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Brodmann area 44, or BA44, is part of the frontal cortex in the human brain. Situated just anterior to premotor cortex (BA6) and on the lateral surface, inferior to BA9. This area is also known as pars opercularis (of the inferior frontal gyrus), and it refers to a subdivision of the cytoarchitecturally defined frontal region of cerebral cortex. In the human it corresponds approximately to the opercular part of inferior frontal gyrus (H). Thus, it is bounded caudally by the inferior precentral sulcus (H) and rostrally by the anterior ascending limb of lateral sulcus (H). It surrounds the diagonal sulcus (H). In the depth of the lateral sulcus it borders on the insula. Cytoarchitectonically it is bounded caudally and dorsally by the agranular frontal area 6, dorsally by the granular frontal area 9 and rostrally by the triangular area 45 (Brodmann-1909). ==Functions== Together with left-hemisphere BA 45, the left hemisphere〔In 95.5% of right-handers and 61.4% of left-handers, therefore about 92% of the clinical population, speech is lateralised in the left hemisphere.〕 BA 44 comprises Broca's area a region involved in semantic tasks. Some data suggest that BA44 is more involved in phonological and syntactic processing. Some recent findings also suggest the implication of this region in music perception. Recent neuroimaging studies show BA44 involvement in selective response suppression in go/no- go tasks and is therefore believed to play an important role in the suppression of response tendencies.〔Forstmann, Birte U.; Van den Wildenberg, Wery P.M. and Ridderinkhof, Richard K (2008). Neural Mechanisms, Temporal Dynamics, and Individual Differences in Interference Control. ''Journal of Cognitive Neuroscience'' 20:10, pp. 1854-65.〕 Neuroimaging studies also demonstrate that area 44 is related to hand movements. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Brodmann area 44」の詳細全文を読む スポンサード リンク
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