TY - GEN
T1 - Decreased brain activation along with increased interstimulus interval in the Posner task
AU - Li, Yujie
AU - Li, Chunlin
AU - Kawata, Yuya
AU - Wu, Jinglong
AU - Kurata, Tomoko
AU - Ohno, Seiichiro
AU - Kanazawa, Susumu
AU - Abe, Koji
PY - 2013
Y1 - 2013
N2 - 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.
AB - 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.
KW - Functional magnetic resonance imaging (fMRI)
KW - Posner task
KW - Posterior cingulate cortex (PCC)
KW - Visual-spatial attention
KW - Visual-spatial bias
UR - http://www.scopus.com/inward/record.url?scp=84881489129&partnerID=8YFLogxK
U2 - 10.1109/ICCME.2013.6548231
DO - 10.1109/ICCME.2013.6548231
M3 - Conference contribution
AN - SCOPUS:84881489129
SN - 9781467329699
T3 - 2013 ICME International Conference on Complex Medical Engineering, CME 2013
SP - 160
EP - 164
BT - 2013 ICME International Conference on Complex Medical Engineering, CME 2013
T2 - 2013 7th ICME International Conference on Complex Medical Engineering, CME 2013
Y2 - 25 May 2013 through 28 May 2013
ER -