IEEE CMES2027

Keynote Talk: Using Gamma Waves to understand Ageing, Mental Disorders, Meditation and Brain Stimulation

Abstract: Visual stimuli induce “narrowband” gamma oscillations (30-70 Hz) are generated due to excitation-inhibition interactions and are linked to high-level cognition such as attention and meditation. I will discuss our research on gamma waves which shows that these oscillations attenuate with aging and neurodegeneration, potentially indicating declining inhibitory function. In contrast, stimulus-induced gamma is stronger in meditators. Interestingly, non-invasive brain stimulation also enhances these stimulus-induced gamma oscillations for about ~1.5 hours. Finally, I will discuss our modelling efforts to link changes in gamma characteristics with specific changes in the underlying circuitry.

Prof. Supratim Ray

Centre for Neuroscience

Indian Institute of Science, Bengaluru

Dr. Supratim Ray is a Professor of Neuroscience at the Indian Institute of Science (IISc). He received a B.Tech in Electrical Engineering from the Indian Institute of Technology (IIT) Kanpur and a Ph.D. in Biomedical Engineering from the Johns Hopkins University. His postdoctoral training was in the department of Neurobiology at Harvard Medical School. He joined the Center for Neuroscience at IISc in June 2011. His lab studies the neural basis of high-level cognition such as selective attention and meditation, with a focus on a brain rhythm called “gamma” (30-80 Hz), which is thought to be associated with high-level cognitive processes.

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