Attentional suppression of activity in the human visual cortex

Smith, A. T., Singh, Krish Devi ORCID: https://orcid.org/0000-0002-3094-2475 and Greenlee, M. W. 2000. Attentional suppression of activity in the human visual cortex. Neuroreport 11 (2) , pp. 271-277.

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Abstract

We have used fMRI to examine the nature of the changes that occur in the human visual cortex when an observer attends to a particular location in the visual image. Previous studies have shown that the magnitude of the response to a visual stimulus is increased when the observer attends to the stimulus. We show that, in addition, attention to a particular location results in a widespread suppression of activity levels at all other locations. This suggests that a key mechanism of attentional modulation may be that spontaneous (baseline) levels of neural activity are adjusted in a position-dependent manner across the entire visual field.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Psychology Neuroscience and Mental Health Research Institute (NMHRI)
Subjects:	B Philosophy. Psychology. Religion > BF Psychology R Medicine > RC Internal medicine > RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry
Uncontrolled Keywords:	Attentional modulation, fMRI, Visual cortex
Publisher:	Lippincott, Williams & Wilkins
ISSN:	0959-4965
Last Modified:	20 Oct 2022 10:02
URI:	https://orca.cardiff.ac.uk/id/eprint/33916

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