Tass Lab Team

Peter A. Tass, MD, PhD
Professor of Neurosurgery

Dr. Peter Tass investigates and develops neuromodulation techniques for understanding and treating neurologic conditions such as Parkinson’s disease, epilepsy, dysfunction following stroke and tinnitus. He creates invasive and non-invasive therapeutic procedures by means of comprehensive computational neuroscience studies and advanced data analysis techniques. The computational neuroscience studies guide experiments that use clinical electrophysiology measures, such as high density EEG recordings and MRI imaging, and various outcome measures. He has pioneered a neuromodulation approach based on thorough computational modelling that employs dynamic self-organization, plasticity and other neuromodulation principles to produce sustained effects after stimulation. To investigate stimulation effects and disease-related brain activity, he focuses on the development of stimulation methods that cause a sustained neural desynchronization by an unlearning of abnormal synaptic interactions. He also performs and contributes to pre-clinical and clinical research in related areas.

Research Scholars

Ali Khaledi-Nasab, PhD

Ali is a postdoctoral fellow, working in the fields of stimulation-induced modulation of structural plasticity, propagation of desynchronizing effects, and control of stimulation with machine learning. Trained as a theoretical and computational physicist, Ali has expertise in the fields of computational neuroscience, nonlinear dynamics, stochastic processes, and network sciences. For his PhD in Physics, Ali worked with Prof. Alexander Neiman at Ohio University, where he studied the collective dynamics of excitable tree networks, which is relevant to some sensory neurons such as gentle touch receptors, muscle spindles, and some electroreceptors. Ali's goal is to use his skills to develop brain stimulation techniques for the treatment of neurological disorders such as Parkinson's disease.


Justus Kromer, PhD

Justus Kromer's research is devoted to improving deep brain stimulation techniques causing long-lasting symptom relief in patients suffering from neurological disorders, e.g. Parkinson's disease. Being a theoretical physicist in the group of Peter Tass, Justus Kromer performs computer simulations in order to understand stimulation-induced rewiring of synaptic connectivity in symptom-related brain regions.

During his PhD studies at Humboldt University in Berlin, Germany, he gained expertise in the fields of stochastic processes, nonlinear dynamics, and computational neurosciences. He was trained in both, computational studies and theoretical modelling. His general research is devoted to understanding and manipulating noisy nonlinear systems with application to biology such as neuronal networks and signal processing systems, e.g. sensory neurons and chemotactic agents.


Tina Munjal, MD

Tina is a resident physician and postdoctoral fellow in the Stanford Department of Otolaryngology - Head & Neck Surgery. She received her undergraduate degree in Biochemistry & Cell Biology from Rice University and her medical degree from the Johns Hopkins University School of Medicine. She also completed a research fellowship at the National Institute on Deafness and Other Communication Disorders at the National Institutes of Health. Prior to joining the Tass lab, her research involved the cellular mechanisms of synaptic plasticity, the molecular genetics of inherited hearing loss, and the optimization of music listening for cochlear implant users. She is now investigating acoustic coordinated reset neuromodulation and other neuromodulation techniques for the treatment of subjective tinnitus. 


Clinical Research Coordinator and EEG Lab Manager

Kristina Pfeifer, BA, MA

Kristina received her Bachelors and Masters in psychology with an emphasis in psycho-physiological research from San Francisco State University. She focuses on analysis of high-density electroencephalography (EEG) data and studies the role of neuromodulation and its effects on abnormal brain activity in Parkinson’s, stroke and epileptic patients. She also performs high-density EEGs and transcranial magnetic stimulation (TMS) in other clinically associated areas.

Clinical Research Coordinator and EEG Technologist

Alexander Cook, BS, MA

Alexander is a clinical research coordinator associate working with high-density electroencephalography (EEG) to develop non-invasive neuromodulation and neurofeedback for patients with neurological disorders such as Parkinson’s disease. He received his Bachelor of Science from the Evergreen State College with an emphasis in biology and his Masters in experimental psychology from San Francisco State University. His goal is to take the knowledge and skills he obtains from the lab to a PhD program in neuroscience.

Stanford Collaborators

External Collaborators