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Cerebellar control of timing and rhythm: functional MRI studles. Katsuyuki SAKAI 1,2 1Department of Neurology, Division of Neuroscience, Graduate School of Medicine, University of Tokyo Keyword: 小脳後葉 , cerebellar posterior lobe , 小脳前葉 , cerebellar anterior lobe , 機能分化 , functional specialization , モジュール性 , modular organization , 階層構造 , hierarchical structure pp.783-791
Published Date 2000/10/10
DOI https://doi.org/10.11477/mf.1431901189
  • Abstract
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Clinical studies have shown that the cerebellum is involved in both motoric and sensory aspects of timing process. Recent functional MRI studies have demonstrated that the timing process is subserved by a specific module within the cerebellum, the lateral part of the posterior lobe (H VIIa). This process is independent of the motor execution process which is subserved by the anterior lobe of the cerebellum. The process of response selection and that of timing adjustment are carried out in parallel, and then integrated in the premotor cortex to generate a final motor program. In addition, it has been shown that the cerebellum is involved in rhythm processing. Rhythms are processed either hierarchically or serially depending on their interval ratios. The former strategy involves the cerebellar anterior lobe, whereas the latter strategy involves the posterior lobe. The precise mechanism of how our brain processes time information remains open to future studies.


Copyright © 2000, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1243 印刷版ISSN 0001-8724 医学書院

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