Arm-use dependent lateralization of gamma and beta oscillations in primate medial motor areas

Ryosuke Hosaka, Toshi Nakajima, Kazuyuki Aihara, Yoko Yamaguchi, Hajime Mushiake

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


The neurons in the motor cortex show lateralization depending on the arm to use. To investigate if local field potential (LFP) oscillations change with contralateral and ipsilateral arm use, we analyzed the power of LFP in supplementary motor areas (SMA) and pre-SMA while animals performed a delayed-response arm use task under visual guidance and memory-based. LFP power changed with the laterality of the arm use, but it was frequency dependent. Specifically, power in the gamma range increased during contralateral arm use, while beta power increased with ipsilateral arm use. Subsequently, we confirmed that the frequency-dependent laterality was true also for the memory-driven movements. Our data therefore suggest that gamma oscillation is linked to the local neuronal activities in the contralateral hemisphere, and beta oscillation is related to withholding undesired arm movements by suppression of the local neuronal activities of the ipsilateral hemisphere.

Original languageEnglish
Pages (from-to)62-66
Number of pages5
JournalNeural Networks
Publication statusPublished - 2015 Feb 1
Externally publishedYes


  • Local field potential
  • Supplementary motor area

ASJC Scopus subject areas

  • Cognitive Neuroscience
  • Artificial Intelligence


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