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| Research article summary (published 30 Oct 2002): |
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The role of rostral Brodmann area 6 in mental-operation tasks: an integrative neuroimaging approach.
Full Abstract
Recent evidence indicates that classical 'motor' areas may also have cognitive functions. We performed three neuroimaging experiments to investigate the functional neuroanatomy underlying three types of nonmotor mental-operation tasks:
numerical, verbal, and spatial. (i) Positron emission tomography showed that parts of the posterior frontal cortex, which are consistent with the pre-supplementary motor area (pre-SMA) and the rostral part of the dorsolateral premotor cortex (PMdr), were active during all three tasks. We also observed activity in the posterior parietal cortex and cerebellar hemispheres during all three tasks. Electrophysiological monitoring confirmed that there were no skeletomotor, oculomotor or articulatory movements during task performance. (ii) Functional magnetic resonance imaging (fMRI) showed that PMdr activity during the mental-operation tasks was localized in the depths of the superior precentral sulcus, which substantially overlapped the region active during complex finger movements and was located dorsomedial to the presumptive frontal eye fields. (iii) Single-trial fMRI showed a transient increase in activity time-locked to the performance of mental operations in the pre-SMA and PMdr. The results of the present study suggest that the PMdr is important in the rule-based association of symbolic cues and responses in both motor and nonmotor behaviors.
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Author information
Author/s: Hanakawa, Takashi (T); Honda, Manabu (M); Sawamoto, Nobukatsu (N); Okada, Tomohisa (T); Yonekura, Yoshiharu (Y); Fukuyama, Hidena (H); Shibasaki, Hiroshi (H);
Affiliation: Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto, Japan.
Journal and publication information
Publication Type: Journal Article; Research Support, Non-U.S. Gov't
Journal: Cerebral cortex (New York, N.Y. : 1991) (Cereb Cortex), published in United States. (Language: eng)
Reference: 2002-Nov; vol 12 (issue 11) : pp 1157-70
Dates: Created 2002/10/15; Completed 2002/11/26; Revised 2006/11/15;
PMID: 12379604, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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