Our research aims to fill a fundamental gap of knowledge about the timing, location, and causal importance of specific neuronal populations in the brain that work together in the millisecond scale to subserve a given brain function.
We record directly from inside the brain in neurosurgical patients that are implanted with multiple electrodes across different anatomical and functional systems. We also apply direct electrical current to specific populations of neurons to alter their function while testing the effect of such perturbation on the human participant subjective feelings or task performance.
Our research is beneficial to each individual patient who volunteers to participate in our cognitive and behavioral experiments because we map the location of functional units within each patient’s brain and share this information with clinicians to make more precise and safer surgical plans and prevent major cognitive deficits after surgery. We also map the location of pathological activity and use the data to locate the source of seizures and the pathways for their propagation in each individual patient’s brain.
Our work is also relevant to public health and has societal impact. We strive to collect novel information about the functional architecture of the human brain, and improve our understanding of how the brain works. This will be vital for our understanding of the pathophysiology of neurological and psychiatric disorders that affect higher level cognitive functions and cause major problems for afflicted individuals and their families and the society.
We study human brain function at multiple levels of cognitive and behavioral processing. We study brain activity from the very early sensory input to very late decision making in even social or emotional domains. We do not focus on a specific area of the brain or on a narrow field of cognitive neuroscience. As documented by our published work, every level of human cognition, every stage of human brain function, and every regions of the human brain - are of interest to us – as we want to understand how different areas of the brain work together across different experimental tasks. For instance, we have studied the prefrontal cortex (PFC) as we have recorded directly from the human periaqueductal gray (PAG) and we have electrically stimulated the human default network as we have stimulated the human hypothalamus. Our goal is to acquire a universal understanding of the functional architecture of the human brain with millisecond and millimeter precision.