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Related Experiment Videos

Changes in motor cortical activity during visuomotor adaptation

S P Wise1, S L Moody, K J Blomstrom

  • 1Section on Neurophysiology, Laboratory of Systems Neuroscience, National Institute of Mental Health, National Institutes of Health, Poolesville, MD 20837, USA. spw@codon.nih.gov

Experimental Brain Research
|September 24, 1998
PubMed
Summary

Researchers studied brain activity in motor areas as a monkey adapted to new visual-motor tasks. Neuronal activity changed significantly in primary motor cortex, supplementary motor cortex, and dorsal premotor cortex during adaptation.

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Area of Science:

  • Neuroscience
  • Motor Control
  • Cognitive Science

Background:

  • Motor adaptation is crucial for learning new skills.
  • Understanding neuronal changes during adaptation informs motor learning theories.
  • Previous research suggests distinct roles for different motor cortical areas.

Purpose of the Study:

  • To investigate neuronal activity in motor cortical areas during adaptation to visuomotor transforms.
  • To compare neuronal changes in primary motor cortex (M1), supplementary motor cortex (M2), and dorsal premotor cortex (PMdc).
  • To determine if M1 and PMdc exhibit different adaptation-related neuronal activity patterns.

Main Methods:

  • Recorded neuronal activity from three rhesus monkey motor cortical areas (M1, M2, PMdc).
  • Monitored neural responses during adaptation to novel visuomotor transformations (e.g., rotations, inversions).

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  • Analyzed changes in task-related neuronal activity magnitude and modulation during adaptation.

    • Main Results:

    • Significant changes in task-related neuronal activity were observed in 209 neurons across M1, M2, and PMdc.
    • Over half of neurons in each area showed altered activity modulation, with increases and decreases balanced.
    • Neuronal activity continued to change even after behavioral performance plateaued, suggesting ongoing memory consolidation.

    Conclusions:

    • Neuronal activity changes occur in M1 during motor adaptation, supporting existing predictions.
    • The study did not find evidence for distinct adaptation roles between M1 and PMdc.
    • Ongoing changes in motor cortex activity post-adaptation may reflect motor memory consolidation for visuomotor skills.