The right posterior parietal cortex mediates spatial reorienting of attentional choice bias

Sengupta, A and Banerjee, S and Ganesh, S and Grover, S and Sridharan, D (2024) The right posterior parietal cortex mediates spatial reorienting of attentional choice bias. In: Nature Communications, 15 (1).

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Abstract

Attention facilitates behavior by enhancing perceptual sensitivity (sensory processing) and choice bias (decisional weighting) for attended information. Whether distinct neural substrates mediate these distinct components of attention remains unknown. We investigate the causal role of key nodes of the right posterior parietal cortex (rPPC) in the forebrain attention network in sensitivity versus bias control. Two groups of participants performed a cued attention task while we applied either inhibitory, repetitive transcranial magnetic stimulation (n = 28) or 40 Hz transcranial alternating current stimulation (n = 26) to the dorsal rPPC. We show that rPPC stimulation � with either modality � impairs task performance by selectively altering attentional modulation of bias but not sensitivity. Specifically, participants� bias toward the uncued, but not the cued, location reduced significantly following rPPC stimulation � an effect that was consistent across both neurostimulation cohorts. In sum, the dorsal rPPC causally mediates the reorienting of choice bias, one particular component of visual spatial attention. © The Author(s) 2024.

Item Type:	Journal Article
Publication:	Nature Communications
Publisher:	Nature Research
Additional Information:	The copyright for this article belongs to authors.
Keywords:	biostimulation; brain; inhibitor; neurology; sensitivity analysis; sensory system, adult; article; attention; attention network; controlled study; diagnosis; female; forebrain; human; human experiment; male; nerve stimulation; posterior parietal cortex; repetitive transcranial magnetic stimulation; spatial attention; surgery; task performance; transcranial alternating current stimulation; association; attention; attentional bias; decision making; depth perception; parietal lobe; physiology; transcranial direct current stimulation; transcranial magnetic stimulation; young adult, Adult; Attention; Attentional Bias; Choice Behavior; Cues; Female; Humans; Male; Parietal Lobe; Space Perception; Transcranial Direct Current Stimulation; Transcranial Magnetic Stimulation; Young Adult
Department/Centre:	Division of Biological Sciences > Centre for Neuroscience Division of Electrical Sciences > Computer Science & Automation
Date Deposited:	06 Sep 2024 12:10
Last Modified:	06 Sep 2024 12:10
URI:	http://eprints.iisc.ac.in/id/eprint/85955

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