Distinguishing the functional roles of multiple regions in distributed neural systems for visual working memory

James V. Haxby, Laurent Petit, Leslie G. Ungerleider, Susan M. Courtney

Research output: Contribution to journalArticlepeer-review

Abstract

We have investigated the human neural systems for visual working memory using functional magnetic resonance imaging to distinguish sustained activity during memory delays from transient responses related to perceptual and motor operations. These studies have identified six distinct frontal regions that demonstrate sustained activity during memory delays. These regions could be distinguished from brain regions in extrastriate cortex that participate more in perception and from brain regions in medial and lateral frontal cortex that participate more in motor control. Moreover, the working memory regions could be distinguished from each other based on the relative strength of their participation in spatial and face working memory and on the relative strength of sustained activity during memory delays versus transient activity related to stimulus presentation. These results demonstrate that visual working memory performance involves the concerted activity of multiple regions in a widely distributed system. Distinctions between functions, such as perception versus memory maintenance, or spatial versus face working memory, are a matter of the degree of participation of different regions, not the discrete parcellation of different functions to different modules. (C) 2000 Academic Press.

Original languageEnglish (US)
Pages (from-to)380-391
Number of pages12
JournalNeuroImage
Volume11
Issue number5 I
DOIs
StatePublished - May 2000

ASJC Scopus subject areas

  • Neurology
  • Cognitive Neuroscience

Fingerprint Dive into the research topics of 'Distinguishing the functional roles of multiple regions in distributed neural systems for visual working memory'. Together they form a unique fingerprint.

Cite this