TY - JOUR
T1 - Functional dissociation in right inferior frontal cortex during performance of go/no-go task
AU - Chikazoe, Junichi
AU - Jimura, Koji
AU - Asari, Tomoki
AU - Yamashita, Ken Ichiro
AU - Morimoto, Hiroki
AU - Hirose, Satoshi
AU - Miyashita, Yasushi
AU - Konishi, Seiki
N1 - Funding Information:
Grant-in-Aid for Specially Promoted Research (19002010) to Y.M.; and a Grant-in-Aid for Scientific Research C (17500203) to S.K. from the Ministry of Education, Culture, Sports, Science and Technology, Japan.
PY - 2009/1
Y1 - 2009/1
N2 - The contribution of the right inferior frontal cortex to response inhibition has been demonstrated by previous studies of neuropsychology, electrophysiology, and neuroimaging. The inferior frontal cortex is also known to be activated during processing of infrequent stimuli such as stimulus-driven attention. Response inhibition has most often been investigated using the go/no-go task, and the no-go trials are usually given infrequently to enhance prepotent response tendency. Thus, it has not been clarified whether the inferior frontal activation during the go/no-go task is associated with response inhibition or processing of infrequent stimuli. In the present functional magnetic resonance imaging study, we employed not only frequent-go trials but also infrequent-go trials that were presented as infrequently as the no-go trials. The imaging results demonstrated that the posterior inferior frontal gyrus (pIFG) was activated during response inhibition as revealed by the no-go vs. infrequent-go trials, whereas the inferior frontal junction (IFJ) region was activated primarily during processing of infrequent stimuli as revealed by the infrequent-go versus frequent-go trials. These results indicate that the pIFG and IFJ within the inferior frontal cortex are spatially close but are associated with different cognitive control processes in the go/no-go paradigm.
AB - The contribution of the right inferior frontal cortex to response inhibition has been demonstrated by previous studies of neuropsychology, electrophysiology, and neuroimaging. The inferior frontal cortex is also known to be activated during processing of infrequent stimuli such as stimulus-driven attention. Response inhibition has most often been investigated using the go/no-go task, and the no-go trials are usually given infrequently to enhance prepotent response tendency. Thus, it has not been clarified whether the inferior frontal activation during the go/no-go task is associated with response inhibition or processing of infrequent stimuli. In the present functional magnetic resonance imaging study, we employed not only frequent-go trials but also infrequent-go trials that were presented as infrequently as the no-go trials. The imaging results demonstrated that the posterior inferior frontal gyrus (pIFG) was activated during response inhibition as revealed by the no-go vs. infrequent-go trials, whereas the inferior frontal junction (IFJ) region was activated primarily during processing of infrequent stimuli as revealed by the infrequent-go versus frequent-go trials. These results indicate that the pIFG and IFJ within the inferior frontal cortex are spatially close but are associated with different cognitive control processes in the go/no-go paradigm.
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U2 - 10.1093/cercor/bhn065
DO - 10.1093/cercor/bhn065
M3 - Article
C2 - 18445602
AN - SCOPUS:57749199330
SN - 1047-3211
VL - 19
SP - 146
EP - 152
JO - Cerebral Cortex
JF - Cerebral Cortex
IS - 1
ER -