- Clinical and Biological Risk Factors of Memory Decline in Alcohol Use Disorder, HIV Infection, and HIV Infection with Alcoholism Comorbidity INS Denver meeting, Journal of the International Neuropsychological Society, 26(S1) 2020
Alcohol's Unique Effects on Cognition in Women: A 2020 (Re)view to Envision Future Research and Treatment.
Alcohol research : current reviews
2020; 40 (2): 03
Alcohol use and misuse is increasing among women. Although the prevalence of drinking remains higher in men than women, the gender gap is narrowing. This narrative review focuses on the cognitive sequelae of alcohol consumption in women. Studies of acute alcohol effects on cognition indicate that women typically perform worse than men on tasks requiring divided attention, memory, and decision-making. Beneficial effects of moderate alcohol consumption on cognition have been reported; however, a number of studies have cautioned that other factors may be driving that association. Although chronic heavy drinking affects working memory, visuospatial abilities, balance, emotional processing, and social cognition in women and men, sex differences mark the severity and specific profile of functional deficits. The accelerated or compressed progression of alcohol-related problems and their consequences observed in women relative to men, referred to as "telescoping," highlights sex differences in the pharmacokinetics, pharmacodynamics, cognitive, and psychological consequences of alcohol. Brain volume deficits affecting multiple systems, including frontolimbic and frontocerebellar networks, contribute to impairment. Taken together, sex-related differences highlight the complexity of this chronic disease in women and underscore the relevance of examining the roles of age, drinking patterns, duration of abstinence, medical history, and psychiatric comorbidities in defining and understanding alcohol-related cognitive impairment.
View details for DOI 10.35946/arcr.v40.2.03
View details for PubMedID 32923307
Emotional Processing and Social Cognition in Alcohol Use Disorder
2019; 33 (6): 808?21
To review deficits in emotional processing and social cognition potentially contributing to the dysfunctional emotion regulation and difficulties with interpersonal relationships observed in individuals with alcohol use disorder (AUD) and to provide directions for future research.First is presented a review of emotional and social-cognitive impairments in recently detoxified AUD individuals that include alexithymia, difficulties in decoding others' emotions, and reduced theory of mind and empathy skills. Social cognition disorders in AUD pose different issues discussed, such as whether (1) these deficits are consequences of excessive alcohol consumption or premorbid risk factors for addiction, (2) emotional and social impairments impede positive treatment outcome, (3) recovery of social abilities is possible with sustained abstinence, and (4) AUD patients are unaware of their emotional and social dysfunctions. Finally, current knowledge on structural and functional brain correlates of these deficits in AUD are reviewed.Emotional and social-cognitive functions affected in AUD can potentially compromise efforts to initiate and maintain abstinence by hampering efficacy of clinical treatment. Such dysfunction can obstruct efforts to enable or reinstate higher-order abilities such as emotional self-regulation, motivation to change, success in interpersonal/social interactions, and emotional insight and awareness of social dysfunctions (i.e., accurate metacognition).The present review highlights the need to account for emotional processing and social cognition in the evaluation and rehabilitation of alcohol-related neurocognitive disorders and to consider psychotherapeutic treatment involving remediation of emotional and social skills as implemented in psychiatric and neurological disorders. (PsycINFO Database Record (c) 2019 APA, all rights reserved).
View details for DOI 10.1037/neu0000572
View details for Web of Science ID 000482569400005
View details for PubMedID 31448948
View details for PubMedCentralID PMC6711390
- Cognitive and Motor Impairment Severity Related to Signs of Subclinical Wernicke's Encephalopathy in HIV Infection JAIDS-JOURNAL OF ACQUIRED IMMUNE DEFICIENCY SYNDROMES 2019; 81 (3): 345?54
- Neurological, nutritional and alcohol consumption factors underlie cognitive and motor deficits in chronic alcoholism ADDICTION BIOLOGY 2019; 24 (2): 290?302
- Relations between cognitive and motor deficits and regional brain volumes in individuals with alcoholism BRAIN STRUCTURE AND FUNCTION 2019
- Brain Activation to Cannabis- and Alcohol-related Words in Alcohol Use Disorder PSYCHIATRY RESEARCH: NEUROIMAGING 2019
Brain activation to cannabis- and alcohol-related words in alcohol use disorder.
Psychiatry research. Neuroimaging
2019; 294: 111005
Cannabis abuse commonly co-occurs with alcohol use disorder (AUD). With increased acceptance and accessibility to cannabis in the US, it is imperative to understand the psychological and neural mechanisms of concurrent alcohol and cannabis use. We hypothesized that neural alcohol-cue conditioning may extent to other drug-related stimuli, such as cannabis, and underwrite the loss of control over reward-driven behavior. Task-activated fMRI examined the neural correlates of alcohol- and cannabis-related word cues in 21 abstinent AUD and 18 control subjects. Relative to controls, AUD showed behavioral attentional biases and frontal hypoactivation to both alcohol- and cannabis-related words. This cue-elicited prefrontal hypoactivation was related to higher lifetime alcohol consumption (pcorrected?0.02) and modulated by past cannabis use histories (p???0.001). In particular, frontal hypoactivation to both alcohol and cannabis cues was pronounced in AUD without prior cannabis exposure. Overall, frontal control mechanisms in abstinent AUD were not sufficiently engaged to override automatic alcohol and cannabis-related intrusions, enhancing the risk for relapse and potentially for alcohol and cannabis co-use with the increased social acceptance and accessibility in the US.
View details for DOI 10.1016/j.pscychresns.2019.111005
View details for PubMedID 31715379
Cognitive impairment severity in relation to signs of subclinical Wernicke's encephalopathy in HIV and alcoholism comorbidity.
AIDS (London, England)
The comorbidity of Human Immunodeficiency Virus (HIV) infection and alcoholism (ALC) is prevalent. Wernicke's encephalopathy (WE), a neurological disorder resulting from thiamine depletion, has been generally associated with alcoholism but has also been reported in HIV infection. This study examined whether subclinical WE signs could contribute to the heterogeneity of cognitive and motor deficits observed in individuals with both disease conditions (HIV+ALC).61 HIV+ALC individuals and 59 controls were assessed on attention and working memory, production, immediate and delayed episodic memory, visuospatial abilities, and upper limb motor function.Using Caine criteria (dietary deficiency, oculomotor abnormality, cerebellar dysfunction, and altered mental state), HIV+ALC individuals were classified by subclinical WE risk factors.Signs of subclinical WE were present in 20% of the HIV+ALC participants. For attention/working memory, delayed memory, and upper limb motor function, HIV+ALCCaine 2+ (i.e., meeting two or three criteria) demonstrated the most severe deficits, scoring lower than HIV+ALC Caine 1 (i.e., meeting one criterion), HIV+ALC Caine 0 (i.e., meeting no criteria), and controls.The high prevalence of subclinical signs of WE and relevance to performance indicate that this condition should be considered in assessment of HIV-infected individuals, especially when alcoholism comorbidity is known or suspected. Above and beyond clinical factors such as depression, alcoholism and HIV disease-related variables, AIDS, hepatitis C and drug history known to mediate neuropsychological performance, subclinical WE signs could partly explain the heterogeneity in patterns and severity of cognitive and motor impairments in HIV-infected individuals with alcoholism comorbidity.
View details for DOI 10.1097/QAD.0000000000002428
View details for PubMedID 31725430
- Heterogeneity of Executive Function and Memory Performance Among Alcoholic Individuals Meeting either the Dietary Deficiency or Ataxia Criterion in the Assessment of Preclinical Wernicke?s Encephalopathy. INS meeting New York, Journal of the International Neuropsychological Society, 25(S1). 2019
- Cognitive and Motor Impairment Severity Related to Signs of Subclinical Wernicke?s Encephalopathy in HIV infection. INS meeting New York, Journal of the International Neuropsychological Society, 25(S1). 2019
- Signs of Subclinical Wernicke?s Encephalopathy and Cognitive Impairment severity in Alcoholism with HIV Infection Comorbidity. Research Society on Alcoholism meeting (RSA, Minneapolis), Alcoholism: Clinical and Experimental Research, 43(S1), 187A. 2019
- Frontal correlates of verbal and visual memory in alcoholism: a double dissociation. Society For Neuroscience meeting (SFN, Chicago), Journal of Neuroscience 2019
- Differences in Brain Structure and Performance Scores Associated with Childhood Trauma in Individuals with and without Alcoholism and HIV Infection. Research Society on Alcoholism meeting (RSA, Minneapolis), Alcoholism: Clinical and Experimental Research, 43(S1), 229A. 2019
- Alcohol use disorder: permanent and transient effects on the brain and neuropsychological functions. THE OXFORD HANDBOOK OF ADULT COGNITIVE DISORDERS. Robert A. Stern and Alosco Mickael (Eds.) 2019
Longitudinally consistent estimates of intrinsic functional networks.
Human brain mapping
Increasing numbers of neuroimaging studies are acquiring data to examine changes in brain architecture by investigating intrinsic functional networks (IFN) from longitudinal resting-state functional MRI (rs-fMRI). At the subject level, these IFNs are determined by cross-sectional procedures, which neglect intra-subject dependencies and result in suboptimal estimates of the networks. Here, a novel longitudinal approach simultaneously extracts subject-specific IFNs across multiple visits by explicitly modeling functional brain development as an essential context for seeking change. On data generated by an innovative simulation based on real rs-fMRI, the method was more accurate in estimating subject-specific IFNs than cross-sectional approaches. Furthermore, only group-analysis based on longitudinally consistent estimates identified significant developmental effects within IFNs of 246 adolescents from the National Consortium on Alcohol and NeuroDevelopment in Adolescence (NCANDA) study. The findings were confirmed by the cross-sectional estimates when the corresponding group analysis was confined to the developmental effects. Those effects also converged with current concepts of neurodevelopment.
View details for PubMedID 30806009
- Clinical and Biological Risk Factors for Cognitive Impairment in Alcohol Use Disorder, HIV Infection, and HIV Infection with Alcoholism Comorbidity. Research Society on Alcoholism meeting (RSA, San Diego), Alcoholism: Clinical and Experimental Research, 42(S1), 56A. 2018
- Neural Correlates of Selective Cognitive and Motor Deficits in Alcohol Use Disorder (AUD). INS meeting Washington DC, Journal of the International Neuropsychological Society, 24(S1). 2018
- Health-related Quality of Life and Resilience in HIV Infection With and Without Alcohol Dependence and Early Childhood Trauma. Research Society on Alcoholism meeting (RSA, San Diego), Alcoholism: Clinical and Experimental Research, 42(S1), 248A. 2018
- Attentional Bias to Alcohol and Cannabis Cues in Alcohol Use Disorder: an fMRI Study. Research Society on Alcoholism meeting (RSA, San Diego), Alcoholism: Clinical and Experimental Research, 42(S1), 133A. 2018
- Heterogeneity in Functional Impairment in AUD: Relations to Age, Neuropsychological, Nutritional, and Alcohol-History Factors. Research Society on Alcoholism meeting (RSA, San Diego), Alcoholism: Clinical and Experimental Research, 42(S1), 59A. 2018
Deviant functional activation and connectivity of the right insula are associated with lack of awareness of episodic memory impairment in nonamnesic alcoholism
2017; 95: 15?28
A disorder of metamemory, expressed as unawareness of mnemonic ability, is typically associated with the profound amnesia of Korsakoff's Syndrome (KS). A similar but less severe type of limited awareness can also occur in non-KS alcoholism and is observed as an impairment in generating Feeling-of-Knowing (FOK) predictions about future recognition performance. We previously found that FOK accuracy was selectively related to volumes of the insula in alcoholics involved in the present study. Unknown, however, are the neural substrates of unawareness of memory impairment in alcoholism. A task-activated fMRI paradigm served to identify neural nodes and networks implicated in inaccurate self-estimation of mnemonic ability in sober alcoholics while they made prospective FOK judgments in an episodic memory paradigm. Lower activation in the right insula correlated with greater overestimations of future memory abilities in alcoholics. Weaker connectivity of the right insula with the left dorsal anterior cingulate cortex, a node of the salience network, and stronger connectivity of the right insula with the right ventromedial prefrontal cortex (vmPFC), a node of the default mode network (DMN), co-occurred in alcoholics relative to the controls. Specifically, alcoholics, who failed to desynchronize insula-vmPFC activity, had greater overestimation of their memory predictions and poorer recognition performance. This study provides novel support that deviant functional activation and connectivity involving the right insula, a hub of the salience network, appears to participate in disrupting metamemory functioning in alcoholics. Compromised FOK performance might result from disturbance of the switching mechanism between brain networks serving self-referential processes (i.e., DMN network) and networks serving externally-driven activities like memory monitoring (i.e., fronto-parietal network). Thus, compromise in insular network coupling could be a neural mechanism underlying anosognosia for subtle mnemonic impairment in nonamnesic alcoholism.
View details for PubMedID 28806707
View details for PubMedCentralID PMC5626611
Executive Functions, Memory, and Social Cognitive Deficits and Recovery in Chronic Alcoholism: A Critical Review to Inform Future Research.
Alcoholism, clinical and experimental research
2017; 41 (8): 1432?43
Alcoholism is a complex and dynamic disease, punctuated by periods of abstinence and relapse, and influenced by a multitude of vulnerability factors. Chronic excessive alcohol consumption is associated with cognitive deficits, ranging from mild to severe, in executive functions, memory, and metacognitive abilities, with associated impairment in emotional processes and social cognition. These deficits can compromise efforts in initiating and sustaining abstinence by hampering efficacy of clinical treatment and can obstruct efforts in enabling good decision making success in interpersonal/social interactions, and awareness of cognitive and behavioral dysfunctions. Despite evidence for differences in recovery levels of selective cognitive processes, certain deficits can persist even with prolonged sobriety. Herein is presented a review of alcohol-related cognitive impairments affecting component processes of executive functioning, memory, and the recently investigated cognitive domains of metamemory, social cognition, and emotional processing; also considered are trajectories of cognitive recovery with abstinence. Finally, in the spirit of critical review, limitations of current knowledge are noted and avenues for new research efforts are proposed that focus on (i) the interaction among emotion-cognition processes and identification of vulnerability factors contributing to the development of emotional and social processing deficits and (ii) the time line of cognitive recovery by tracking alcoholism's dynamic course of sobriety and relapse. Knowledge about the heterochronicity of cognitive recovery in alcoholism has the potential of indicating at which points during recovery intervention may be most beneficial.
View details for PubMedID 28618018
- Effects of Childhood Trauma and Alcoholism History on Neuropsychological Performance in Adults with HIV Infection: An Initial Study. Journal of HIV/AIDS & Infectious Diseases 2017
- Differential compromise of prospective and retrospective metamemory monitoring and their dissociable structural brain correlates CORTEX 2016; 81: 192-202
Anosognosia for Memory Impairment in Addiction: Insights from Neuroimaging and Neuropsychological Assessment of Metamemory.
In addiction, notably Alcohol Use Disorder (AUD), patients often have a tendency to fail to acknowledge the reality of the disease and to minimize the physical, psychological, and social difficulties attendant to chronic alcohol consumption. This lack of awareness can reduce the chances of initiating and maintaining sobriety. Presented here is a model focusing on compromised awareness in individuals with AUD of mild to moderate cognitive deficits, in particular, for episodic memory impairment-the ability to learn new information, such as recent personal experiences. Early in abstinence, alcoholics can be unaware of their memory deficits and overestimate their mnemonic capacities, which can be investigated with metamemory paradigms. Relevant neuropsychological and neuroimaging results considered suggest that the alcoholics' impairment of awareness of their attenuated memory function can be a clinical manifestation explained mechanistically by neurobiological factors, including compromise of brain systems that result in a mild form of mnemonic anosognosia. Specifically, unawareness of memory impairment in AUD may result from a lack of personal knowledge updating attributable to damage in brain regions or connections supporting conscious recollection in episodic memory. Likely candidates are posterior parietal and medial frontal regions known to be integral part of the Default Mode Network (DMN) and the insula leading to an impaired switching mechanism between the DMN and the Central-Executive Control (i.e., Lateral Prefronto-Parietal) Network. The cognitive concepts and neural substrates noted for addictive disorders may also be relevant for problems in self-identification of functional impairment resulting from injury following war-related blast, sport-related concussion, and insidiously occurring dementia.
View details for PubMedID 27447979
- Differential Impairment in Prospective and Retrospective Metamemory Monitoring in Nonamnesic Alcoholism: Evidence toward Mnemonic Anosognosia INS meeting Boston, Journal of the International Neuropsychological Society, 22(S1), 246 2016
- Relation between Early Childhood Trauma and Cognitive and Motor Performance in HIV-Infected Adults with and without Alcoholism. Research Society on Alcoholism meeting (RSA, New Orleans), Alcoholism: Clinical and Experimental Research, 40(S1), 185A. 2016
- Compromised Insula Activation and Connectivity Contribute to Anosognosia of Episodic Memory Impairment in Alcohol Use Disorder. Research Society on Alcoholism meeting (RSA, New Orleans), Alcoholism: Clinical and Experimental Research, 40(S1), 184A. 2016
Sensitive biomarkers of alcoholism's effect on brain macrostructure: similarities and differences between France and the United States.
Frontiers in human neuroscience
2015; 9: 354-?
Alcohol consumption patterns and recognition of health outcomes related to hazardous drinking vary widely internationally, raising the question whether these national differences are reflected in brain damage observed in alcoholism. This retrospective analysis assessed variability of alcoholism's effects on brain cerebrospinal fluid (CSF) and white matter volumes between France and the United States (U.S.). MRI data from two French sites (Caen and Orsay) and a U.S. laboratory (SRI/Stanford University) were acquired on 1.5T imaging systems in 287 controls, 165 uncomplicated alcoholics (ALC), and 26 alcoholics with Korsakoff's Syndrome (KS). All data were analyzed at the U.S. site using atlas-based parcellation. Results revealed graded CSF volume enlargement from ALC to KS and white matter volume deficits in KS only. In ALC from France but not the U.S., CSF and white matter volumes correlated with lifetime alcohol consumption, alcoholism duration, and length of sobriety. MRI highlighted CSF volume enlargement in both ALC and KS, serving as a basis for an ex vacuo process to explain correlated gray matter shrinkage. By contrast, MRI provided a sensitive in vivo biomarker of white matter volume shrinkage in KS only, suggesting a specific process sensitive to mechanisms contributing to Wernicke's encephalopathy, the precursor of KS. Identified structural brain abnormalities may provide biomarkers underlying alcoholism's heterogeneity in and among nations and suggest a substrate of gray matter tissue shrinkage. Proposed are hypotheses for national differences in interpreting whether the severity of sequelae observe a graded phenomenon or a continuum from uncomplicated alcoholism to alcoholism complicated by KS.
View details for DOI 10.3389/fnhum.2015.00354
View details for PubMedID 26157376
View details for PubMedCentralID PMC4477159
- Feeling Of Knowing: neural substrates of denial of personal mnemonic compromise in alcohol use disorder Research Society on Alcoholism meeting (RSA, San Antonio), Alcoholism: Clinical and Experimental Research, 39(S1), 30A 2015
- Brain Activation to Cannabis- and Alcohol-related Words in Alcohol Use Disorder Society For Neuroscience meeting (SFN, Chicago), Journal of Neuroscience 2015
Chronic alcohol consumption and its effect on nodes of frontocerebellar and limbic circuitry: Comparison of effects in France and the United States.
Human brain mapping
2014; 35 (9): 4635-4653
Alcohol use disorders present a significant public health problem in France and the United States (U.S.), but whether the untoward effect of alcohol on the brain results in similar damage in both countries remains unknown. Accordingly, we conducted a retrospective collaborative investigation between two French sites (Caen and Orsay) and a U.S. laboratory (SRI/Stanford University) with T1-weighted, structural MRI data collected on a common imaging platform (1.5T, General Electric) on 288 normal controls (NC), 165 uncomplicated alcoholics (ALC), and 26 patients with alcoholic Korsakoff's syndrome (KS) diagnosed at all sites with a common interview instrument. Data from the two countries were pooled, then preprocessed and analyzed together at the U.S. site using atlas-based parcellation. National differences indicated that thalamic volumes were smaller in ALC in France than the U.S. despite similar alcohol consumption levels in both countries. By contrast, volumes of the hippocampus, amygdala, and cerebellar vermis were smaller in KS in the U.S. than France. Estimated amount of alcohol consumed over a lifetime, duration of alcoholism, and length of sobriety were significant predictors of selective regional brain volumes in France and in the U.S. The common analysis of MRI data enabled identification of discrepancies in brain volume deficits in France and the U.S. that may reflect fundamental differences in the consequences of alcoholism on brain structure between the two countries, possibly related to genetic or environmental differences. Hum Brain Mapp 35:4635-4653, 2014. © 2014 Wiley Periodicals, Inc.
View details for DOI 10.1002/hbm.22500
View details for PubMedID 24639416
Brain Structural Substrates of Cognitive Procedural Learning in Alcoholic Patients Early in Abstinence
ALCOHOLISM-CLINICAL AND EXPERIMENTAL RESEARCH
2014; 38 (8): 2208-2216
Procedural learning allows for the acquisition of new behavioral skills. Previous studies have shown that chronic alcoholism is characterized by impaired cognitive procedural learning and brain abnormalities affecting regions that are involved in the automation of new cognitive procedures in healthy individuals. The goal of the present study was to investigate the brain structural substrates of cognitive procedural learning in alcoholic patients (ALs) early in abstinence.Thirty-one ALs and 31 control participants (NCs) performed the Tower of Toronto task (4 daily learning sessions, each comprising 10 trials) to assess cognitive procedural learning. We also assessed episodic and working memory, executive functions, and visuospatial abilities. ALs underwent 1.5T structural magnetic resonance imaging.The initial cognitive phase was longer in the AL group than in the NC group, whereas the autonomous phase was shorter. In ALs, the longer cognitive phase was predicted by poorer planning and visuospatial working memory abilities, and by smaller gray matter (GM) volumes in the angular gyrus and caudate nucleus. ALs' planning abilities correlated with smaller GM volume in the angular gyrus.Cognitive procedural learning was impaired in ALs, with a delayed transition from the cognitive to the autonomous phase. This slowdown in the automation of the cognitive procedure was related to lower planning abilities, which may have hampered the initial generation of the procedure to be learned. In agreement with this neuropsychological finding, a persistent relationship was found between learning performance and the GM volumes of the angular gyrus and caudate nucleus, which are usually regarded as markers of planning and initial learning of the cognitive procedure.
View details for DOI 10.1111/acer.12486
View details for Web of Science ID 000341181900009
View details for PubMedID 25156613
Impaired decision-making and brain shrinkage in alcoholism
2014; 29 (3): 125-133
Alcohol-dependent individuals usually favor instant gratification of alcohol use and ignore its long-term negative consequences, reflecting impaired decision-making. According to the somatic marker hypothesis, decision-making abilities are subtended by an extended brain network. As chronic alcohol consumption is known to be associated with brain shrinkage in this network, the present study investigated relationships between brain shrinkage and decision-making impairments in alcohol-dependent individuals early in abstinence using voxel-based morphometry. Thirty patients performed the Iowa Gambling Task and underwent a magnetic resonance imaging investigation (1.5T). Decision-making performances and brain data were compared with those of age-matched healthy controls. In the alcoholic group, a multiple regression analysis was conducted with two predictors (gray matter [GM] volume and decision-making measure) and two covariates (number of withdrawals and duration of alcoholism). Compared with controls, alcoholics had impaired decision-making and widespread reduced gray matter volume, especially in regions involved in decision-making. The regression analysis revealed links between high GM volume in the ventromedial prefrontal cortex, dorsal anterior cingulate cortex and right hippocampal formation, and high decision-making scores (P<0.001, uncorrected). Decision-making deficits in alcoholism may result from impairment of both emotional and cognitive networks.
View details for DOI 10.1016/j.eurpsy.2012.10.002
View details for Web of Science ID 000332523800002
View details for PubMedID 23182846
Relationship Between Brain Volumetric Changes and Interim Drinking at Six Months in Alcohol-Dependent Patients
ALCOHOLISM-CLINICAL AND EXPERIMENTAL RESEARCH
2014; 38 (3): 739-748
Chronic alcohol consumption results in brain damage potentially reversible with abstinence. It is however difficult to gauge the degree of recovery of brain tissues with abstinence since changes are subtle and a significant portion of patients relapse. State-of-the-art morphometric methods are increasingly used in neuroimaging studies to detect subtle brain changes at a voxel level. Our aim was to use the most refined morphometric methods to observe in alcohol dependence the relationship between volumetric changes and interim drinking over a 6-month follow-up.Overall, 19 patients with alcohol dependence received volumetric T1-weighted magnetic resonance imaging (MRI) after detoxification. A 6-month follow-up study was then conducted, during which 11 of them received a second MRI scan. First, correlations were conducted between gray matter (GM) and white matter (WM) volumes of patients at alcohol treatment entry and the amount of alcohol consumed between treatment entry and follow-up. Second, longitudinal analyses were performed from pairs of MRI scans using tensor-based morphometry in the 11 patients, and correlations were computed between the resultant Jacobian maps of GM and WM and interim drinking.Our preliminary results showed that, among others, alcoholics with smaller thalamus at alcohol treatment entry tended to resume with heavy alcohol consumption (p < 0.005 uncorrected [unc.]). Our longitudinal study revealed an overall inverse relationship between recovery of brain structures like the cerebellum, striatum, and cingulate gyrus, and the amount of alcohol consumed over the 6-month follow-up (p < 0.005 unc.). The recovery could be observed not only with strict abstinence but also in cases of moderate resumption of alcohol consumption, when there had been no drastic relapse into alcohol dependence.Those preliminary findings indicate that the volume of the thalamus at treatment entry may have an influence on subsequent interim drinking. There is recovery of certain brain regions even when patients resume with moderate, but not drastic, alcohol consumption.
View details for DOI 10.1111/acer.12300
View details for Web of Science ID 000332758200018
View details for PubMedID 24483366
- Heterogeneity in alcohol effects on nodes of frontocerebellar and limbic circuitry: evidence from the U.S.-France collaborative study Research Society on Alcoholism meeting (RSA, Seattle), Alcoholism: Clinical and Experimental Research, 38(S1), 319A 2014
Readiness to change and brain damage in patients with chronic alcoholism
2013; 213 (3): 202-209
High motivation to change is a crucial triggering factor to patients' engagement in clinical treatment. This study investigates whether the low readiness to change observed in some alcoholic inpatients at treatment entry could, at least partially, be linked with macrostructural gray matter abnormalities in critical brain regions. Participants comprised 31 alcoholic patients and 27 controls, who underwent 1.5-T magnetic resonance imaging. The Readiness to Change Questionnaire, designed to assess three stages of motivation to change (precontemplation, contemplation and action stages), was completed by all patients, who were then divided into "Action" (i.e., patients in action stage) and "PreAction" (i.e., patients in precontemplation or in contemplation stage) subgroups. The PreAction subgroup, but not the Action subgroup, had gray matter volume deficits compared with controls. Unlike the patients in the Action subgroup, the PreAction patients had gray matter abnormalities in the cerebellum (Crus I), fusiform gyri and frontal cortex. The low level of motivation to modify drinking behavior observed in some alcoholic patients at treatment entry may be related to macrostructural brain abnormalities in regions subtending cognitive, emotional and social abilities. These brain volume deficits may result in impairment of critical abilities such as decision making, executive functions and social cognition skills. Those abilities may be needed to resolve ambivalence toward alcohol addiction and to apply "processes of change", which are essential for activating the desire to change problematic behavior.
View details for DOI 10.1016/j.pscychresns.2013.03.009
View details for Web of Science ID 000323934800004
View details for PubMedID 23838052
- Troubles neuropsychologiques dans l?alcoolo-dépendance : l?origine de la rechute ? Revue de Neuropsychologie 2013
- Decision making in alcoholism, HIV infection, and their comorbidity: Differential contributions of cognitive functions INS meeting Hawaii, Journal of the International Neuropsychological Society, 19(S1), 284 2013
- Cross-sectional and longitudinal investigations of brain volumetric changes and interim drinking at six months in alcohol dependent patients Research Society on Alcoholism meeting (RSA, Orlando), Alcoholism: Clinical and Experimental Research, 37(S2), 212A 2013
- Decision making and brain structural substrates in alcoholism, HIV infection, and their comorbidity Research Society on Alcoholism meeting (RSA, Orlando), Alcoholism: Clinical and Experimental Research, 37(S2), 113A 2013
- Functional Network of Metamemory Performance During an Episodic Feeling-Of-Knowing Judgment INS meeting Seattle, Journal of the International Neuropsychological Society, 20(S1) 2013
Cognitive Barriers to Readiness to Change in Alcohol-Dependent Patients
ALCOHOLISM-CLINICAL AND EXPERIMENTAL RESEARCH
2012; 36 (9): 1542-1549
Patients' personal investment and readiness to change have proved to be a prerequisite for the successful treatment of alcohol addiction. The aim of this study was to determine the contribution of cognitive functions to the motivation process to abandon maladjusted behavior in favor of a healthier lifestyle.An adapted version of the "readiness to change" questionnaire was completed by 31 alcohol-dependent patients after detoxification and at alcohol treatment entry. This tool is designed to assess the 3 main stages of motivation to change regarding alcohol consumption: precontemplation (substance abuse and no intention to stop drinking), contemplation (strong intention to change habits but ambivalent behavior), and action (cessation of excessive alcohol consumption and behavioral changes for healthier habits) stages. Patients and 37 healthy controls also underwent an extensive neuropsychological battery including episodic memory, metamemory, executive functions, and decision-making assessment.When alcohol-dependent patients were considered as a group, the mean score on the action subscale was significantly higher than the precontemplation and contemplation ones. Nevertheless, when the stage of change reached by each patient was considered individually, we found that some alcohol-dependent patients were still in the earlier precontemplation and contemplation stages. Stepwise regression analysis revealed links between impaired memory and executive functions and low motivation, and between good decision-making skills and high motivation.Our results suggest that a set of complementary cognitive abilities is needed to achieve awareness and resolve ambivalence toward alcohol addiction, which is essential for activating the desire to change problematic behavior.
View details for DOI 10.1111/j.1530-0277.2012.01760.x
View details for Web of Science ID 000308435200010
View details for PubMedID 22458335
Macrostructural abnormalities in Korsakoff syndrome compared with uncomplicated alcoholism
2012; 78 (17): 1330-1333
To distinguish, in patients with Korsakoff syndrome (KS), the structural brain abnormalities shared with alcoholic patients without KS (AL), from those specific to KS.MRI data were collected in 11 alcoholic patients with KS, 34 alcoholic patients without KS, and 25 healthy control subjects (CS). Gray and white matter volumes were compared in the 3 groups using a voxel-based approach.A conjunction analysis indicated a large pattern of shared gray and white matter volume deficits in AL and KS. There were graded effects of volume deficits (KS < AL < CS) in the medial portion of the thalami, hypothalamus (mammillary bodies), left insula, and genu of the corpus callosum. Abnormalities in the left thalamic radiation were observed only in KS.Our results indicate considerable similarities in the pattern of gray and white matter damage in AL and KS. This finding confirms the widespread neurotoxic effect of chronic alcohol consumption. Only a few cerebral regions, including the medial thalami, mammillary bodies, and corpus callosum, were more severely damaged in KS than in AL. The continuum of macrostructural damage from AL to KS is therefore restricted to key brain structures. Longitudinal investigations are required to determine whether alcoholic patients with medial thalamic volumes that are comparable to those of patients with KS are at increased risk of developing KS.
View details for DOI 10.1212/WNL.0b013e318251834e
View details for Web of Science ID 000303324100015
View details for PubMedID 22496200
- Cognitive procedural learning in alcoholism and Korsakoff?s syndrome: errorless versus errorful learning Research Society on Alcoholism meeting (RSA, San Francisco), Alcoholism: Clinical and Experimental Research, 36(S1), 234A 2012
Study of Metamemory in Patients With Chronic Alcoholism Using a Feeling-of-Knowing Episodic Memory Task
ALCOHOLISM-CLINICAL AND EXPERIMENTAL RESEARCH
2010; 34 (11): 1888-1898
Alcoholism affects various cognitive processes, including components of memory. Metamemory, though of particular interest for patient treatment, has not yet been extensively investigated.?A feeling-of-knowing (FOK) measure of metamemory was administered to 28 alcoholic patients and 28 healthy controls during an episodic memory task including the learning of 20 pairs of items, followed by a 20-minute delayed recall and a recognition task. Prior to recognition, participants rated their ability to recognize each nonrecalled word among 4 items. This episodic FOK measure served to compare predictions of future recognition performance and actual recognition performance. Furthermore, a subjective measure of metamemory, the Metamemory In Adulthood (MIA) questionnaire, was completed by patients and controls. This assessment of alcoholic patients' metamemory profile was accompanied by an evaluation of episodic memory and executive functioning.FOK results revealed deficits in accuracy, with the alcoholic patients providing overestimations. There were also links between FOK inaccuracy, executive decline, and episodic memory impairment in patients. MIA results showed that although alcoholics did display memory difficulties, they did not differ from controls on questions about memory capacity.Chronic alcoholism affects both episodic memory and metamemory for novel information. Patients were relatively unaware of their memory deficits and believed that their memory was as good as that of the healthy controls. The monitoring measure (FOK) and the subjective measure of metamemory (MIA) showed that patients with chronic alcoholism overestimated their memory capacities. Episodic memory deficit and executive dysfunction would explain metamemory decline in this clinical population.
View details for DOI 10.1111/j.1530-0277.2010.01277.x
View details for Web of Science ID 000283594000008
View details for PubMedID 20735374
- La métamémoire: théorie et Clinique Revue de Neuropsychologie 2009
- Neuroimagerie fonctionnelle des amnésies non-dégénératives. Des amnésies organiques aux amnésies psychogène : Théorie, évaluation et prise en charge. 2008