Decreased brain activation along with increased interstimulus interval in the Posner task

Yujie Li, Chunlin Li, Yuya Kawata, Jinglong Wu, Tomoko Kurata, Seiichiro Ohno, Susumu Kanazawa, Koji Abe

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In experimental paradigms, voluntary orienting of visual-spatial attention is conventionally achieved through the Posner task in which predictive central cues are presented to indicate the location of an upcoming peripheral target, followed by varying inter-stimulus interval (ISI). Previous studies have indicated that the effects of ISI on spatial attention can occur. However, to date, brain mechanisms associated with ISI effects remain unclear. We investigated the brain activity changes along with increased ISI. Behaviorally, subjects exhibited no difference in the different ISI conditions. However, neuroimaging data revealed reduced activity in the posterior cingulate cortex (PCC) as ISI becomes longer. We propose that, as time went on, the strength of visual-spatial bias reduced, resulting in decreased PCC activation.

Original languageEnglish
Title of host publication2013 ICME International Conference on Complex Medical Engineering, CME 2013
Pages160-164
Number of pages5
DOIs
Publication statusPublished - 2013
Event2013 7th ICME International Conference on Complex Medical Engineering, CME 2013 - Beijing, China
Duration: May 25 2013May 28 2013

Publication series

Name2013 ICME International Conference on Complex Medical Engineering, CME 2013

Other

Other2013 7th ICME International Conference on Complex Medical Engineering, CME 2013
CountryChina
CityBeijing
Period5/25/135/28/13

Keywords

  • Functional magnetic resonance imaging (fMRI)
  • Posner task
  • Posterior cingulate cortex (PCC)
  • Visual-spatial attention
  • Visual-spatial bias

ASJC Scopus subject areas

  • Biomedical Engineering

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