Alpha-band desynchronization in human parietal area during reach planning.

• 文室, 知之

• Matsuhashi, Masao

• Miyazaki, Tomoko

• Inouchi, Morito

• Hitomi, Takefumi

• Matsumoto, Riki

• Takahashi, Ryosuke

• Fukuyama, Hidenao

• 池田, 昭夫

抄録

[Objective]The symptoms with optic ataxia suggest that simple and visually guided hand movements are controlled by 2 different neural substrates. To assess the differential frequency-coded posterior parietal cortex (PPC) role in planning visuo-motor goal-directed tasks, we studied the action specificity of event-related desynchronization (ERD) in this area. [Methods]We investigated cortical activity by electroencephalography, while 16 healthy subjects performed self-paced reaching or wrist extension (control) movements. Time–frequency representations were calculated for each movement during the preparatory period. [ResultsERD dynamics in upper alpha-band indicated that preparing a goal-directed action activates contralateral PPC to the moving hand around 1.2 s before starting the movement, while this activation is later (around 0.7 s) in preparing a not-goal-directed action. The posterior dominant rhythm had peak frequency of lower alpha-band at bilateral parietal. [Conclusions]Posterior parietal cortex encodes goal-directed movement preparation through upper alpha-band activity, whereas general attention is processed via lower alpha-band oscillations. [Significance]Preparing to reach an object engages posterior parietal cortex earlier than a not-goal directed movement.

収録刊行物

• Clinical neurophysiology

  Clinical neurophysiology 126 (4), 756-762, 2015-04

  Elsevier

キーワード

• Alpha-band desynchronization
• Reaching
• Parietal area
• Motor planning
• Adult
• Alpha Rhythm/physiology
• Brain Mapping/methods
• Electroencephalography/methods
• Female
• Hand/physiology
• Humans
• Intention
• Male
• Movement/physiology
• Parietal Lobe/physiology
• Young Adult

詳細情報

• CRID: 1050282810792899072
• NII論文ID: 120005661555
• NII書誌ID: AA11309888
• ISSN: 13882457
• HANDLE: 2433/200243
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • CiNii Articles