Spectral Power in Marmoset Frontal Motor Cortex during Natural Locomotor Behavior

Banty Tia, Mitsuaki Takemi, Akito Kosugi, Elisa Castagnola, Davide Ricci, Junichi Ushiba, Luciano Fadiga, Atsushi Iriki

Research output: Contribution to journalArticlepeer-review

Abstract

During primate arboreal locomotion, substrate orientation modifies body axis orientation and biomechanical contribution of fore- A nd hindlimbs. To characterize the role of cortical oscillations in integrating these locomotor demands, we recorded electrocorticographic activity from left dorsal premotor, primary motor, and supplementary motor cortices of three common marmosets moving across a branch-like small-diameter pole, fixed horizontally or vertically. Animals displayed behavioral adjustments to the task, namely, the horizontal condition mainly induced quadrupedal walk with pronated/neutral forelimb postures, whereas the vertical condition induced walk and bound gaits with supinated/neutral postures. Examination of cortical activity suggests that β (16-35 Hz) and γ(75-100 Hz) oscillations could reflect different processes in locomotor adjustments. During task, modulation of γERS by substrate orientation (horizontal/vertical) and epoch (preparation/execution) suggests close tuning to movement dynamics and biomechanical demands. β ERD was essentially modulated by gait (walk/bound), which could illustrate contribution to movement sequence and coordination. At rest, modulation of β power by substrate orientation underlines its role in sensorimotor processes for postural maintenance.

Original languageEnglish
Pages (from-to)1077-1089
Number of pages13
JournalCerebral Cortex
Volume31
Issue number2
DOIs
Publication statusPublished - 2021 Feb 1

Keywords

  • body posture
  • gait
  • substrate orientation
  • β desynchronization
  • γsynchronization

ASJC Scopus subject areas

  • Cognitive Neuroscience
  • Cellular and Molecular Neuroscience

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