Our senses convey rich and detailed information about the external world, but we can selectively attend to some details while ignoring others. This capacity for selective attention is critical for survival and essential for complex tasks. Our lab studies the mechanisms of selective attention in two species (humans and non-human primates) and at four “levels” of recordings: spikes, local field potential (LFP), electrocorticogram (ECoG) and electroencephalogram (EEG) (see Figure below).
In particular, we focus on a brain rhythm called gamma (30-80 Hz), which is modulated by attentional load and is also highly dependent on the properties of visual stimuli, and can provide useful clues about the network architecture. This cross-scale, cross-species recording setup is also used for brain-computer interfacing applications and for diagnosis of mental disorders.
Different recording scales in humans and non-human primates
In addition, we are also expanding our research to the following areas: (1) building detailed biophysical models to better understand brain signals at various scales, (2) clinical applications using gamma rhythm as a diagnostic tool and (3) brain-machine interfacing applications.
See our poster for the Wellcome-DBT India Alliance end report that has a summary of completed and ongoing projects here.