School of Medicine


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  • Daniel Alves Neiva Barbosa

    Daniel Alves Neiva Barbosa

    Postdoctoral Research Fellow, Neurosurgery

    Bio Daniel A. N. Barbosa, M.D., is a Postdoctoral Scholar sponsored by Dr. Casey H. Halpern (Assistant Professor of Neurosurgery) and co-sponsored by Dr. Jennifer McNab (Assistant Professor of Radiology). He received his medical degree from the Federal University of the State of Rio de Janeiro in 2018. During his clinical education, Dr. Barbosa followed several renowned neurosurgeons and neurologists, and had a large experience with neurological and psychiatric patients. He developed great interest for the investigations of neurosurgical techniques to improve brain function. Now, he is working on multimodal imaging techniques to improve stereotactic targeting in on-demand, responsive neuromodulation (RNS) of the nucleus accumbens for pathological impulsivity, a pervasive symptom in a wide range of neurological and neuropsychiatric disorders. After a couple of years working on research, Dr. Barbosa plans to start his residency in Neurological Surgery and ultimately pursue his career in Stereotactic and Functional Neurosurgery.

  • Mahendra Bhati

    Mahendra Bhati

    Clinical Associate Professor, Psychiatry and Behavioral Sciences

    Bio Dr. Bhati is a board certified neuropsychiatrist with expertise in psychiatric diagnosis, psychopharmacology, and neuromodulation. He completed postdoctoral research studying transcranial magnetic stimulation (TMS) evoked potentials in schizophrenia and was a principle investigator for the DSM-5 academic field trials. His research experience included roles as an investigator in the first controlled clinical trials of deep brain stimulation and low field synchronized TMS for treatment of depression. His current interests include studying TMS-evoked potentials as biomarkers for neuropsychiatric disorders, augmented-reality TMS, closed-loop responsive neurostimulation for treatment of impulse and fear-related disorders, and magnetic resonance guided focused ultrasound for treatment-resistant obsessive compulsive disorder and depression.

  • Mark G Bigder

    Mark G Bigder

    Clinical Instructor, Neurosurgery

    Bio Dr Bigder was born and raised in Thunder Bay, Canada where he completed Bachelor of Arts in Psychology and Honours Bachelor of Kinesiology degrees through Lakehead University. He subsequently completed medical school and neurosurgical residency in Winnipeg at the University of Manitoba. During his residency, Dr Bigder completed a Master of Public Health degree in epidemiology at Harvard TH Chan School of Public Health. He has published research articles on Gamma Knife radiosurgery, microvascular decompression and various public health topics, and has presented his work at international conferences including the International Stereotactic Radiosurgery Society Congress, Congress of Neurological Surgeons and European Public Health Conference among others.

    Dr Bigder has been involved in several leadership roles including serving as the Canadian Neurosurgical Society National Resident Representative, member of the Canadian Neurological Sciences Federation Scientific Planning Committee and member of the Canadian Neurosurgical Research Collaborative.

    Dr Bigder, along with his wife Sara, together enjoy running, hiking and spending time in the outdoors with their daughter and two dogs. His love for travel and adventure has taken him on journeys to a number of destinations worldwide including the summits of Mt Batur, Cotopaxi, Kilimanjaro and Kala Patthar.

  • Nikolas┬áBlevins, MD

    Nikolas Blevins, MD

    Larry and Sharon Malcolmson Professor in the School of Medicine and Professor, by courtesy, of Neurosurgery at the Stanford University Medical Center

    Current Research and Scholarly Interests Inner ear microendoscopy -- Developing techniques for minimally-invasive imaging of inner ear microanatomy and neural pysiology. Applications include improved cochlear implant development, inner ear regenerative techniques, inner ear surgery, and auditory physiology.

    Microsurgical robotics -- Developing scalable microsurgical instrumentation and robotic techniques for use in head and neck surgery.

    Surgical Simulation -- Immersive environment for temporal bone surgical simulation.