Perception, Attention, Decision-making

Visuospatial attention may facilitate neural processing of the selected stimulus through two mechanisms: either by influencing perceptual sensitivity or by altering decisional bias. We seek to study the putative causal contributions of areas in the prefrontal cortex, and the posterior parietal cortex to sensitivity and bias modulation during spatial attention. We will apply non-invasive Transcranial magnetic stimulation (TMS) to focally interfere with the activity in these regions.

The results will provide important insights into the mechanisms by which these key regions in the frontoparietal cortex, and their associated brain rhythms, contribute to visuospatial selective attention.

Similarly, we will be using transcranial alternating current stimulation (tACS) to entrain brain oscillations and understand neural correlates between frontoparietal cortex and selective visual attention.

PI : Dr.Sridharan Devarajan (Webpage)