Phase locking of β oscillation in electrocorticography (ECoG) in the monkey motor cortex at the onset of EMGs and 3D reaching movements

Hidenori Watanabe, Kazutaka Takahashi, Tadashi Isa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

β oscillations in local field potentials, electrocorticography (ECoG), and electroencephalograms (EEG) are ubiquitous in the motor cortex of monkeys and humans. However, relations between their dynamical properties and behavior have not been well studied. Here, we used ECoG grids to cover large areas of motor cortex and some somatosensory cortex in monkeys while they performed an unconstrained reaching and a lever pulling task in three dimensional space with or without go cue. We used percentage of phase locking (PPL) as a dynamical property of β oscillations aligned to behaviorally relevant events, reaching onsets (RO), lever onset (LO), and holding onset (HO) as well as multiple peaks of electromyography (EMG) recorded from various upper limb muscles. We showed that relative strength of PPL alinged to RO and LO were reserved with or without the external go cues. Furthermore, among the muscles that we recorded EMGs from, β oscillations were not closely phase locked to any of EMG onsets. Therefore, phase locking of β oscillations is related more to the attentive state and external cues as opposed to detailed muscle activities.

Original languageEnglish
Title of host publication2015 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages55-58
Number of pages4
ISBN (Electronic)9781424492718
DOIs
Publication statusPublished - 2015 Nov 4
Externally publishedYes
Event37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2015 - Milan, Italy
Duration: 2015 Aug 252015 Aug 29

Publication series

NameProceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS
Volume2015-November
ISSN (Print)1557-170X

Other

Other37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2015
CountryItaly
CityMilan
Period15/8/2515/8/29

Keywords

  • Electrocorticography (ECoG)
  • Motor cortex
  • kinetics
  • non-human primates
  • phase locking
  • spatiotemporal dynamics
  • β oscillations

ASJC Scopus subject areas

  • Signal Processing
  • Biomedical Engineering
  • Computer Vision and Pattern Recognition
  • Health Informatics

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