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[Motor impersistence]

S Hirai1, Y Sakai

  • 1Department of Neurology, Gunma University School of Medicine.

Rinsho Shinkeigaku = Clinical Neurology
|December 1, 1993
PubMed
Summary

Motor impersistence (MI), the inability to sustain voluntary acts like keeping eyes closed, is linked to right hemisphere damage when defined as difficulty performing multiple acts simultaneously. This finding helps localize the responsible brain lesion.

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Area of Science:

  • Neurology
  • Neuroscience
  • Cognitive Science

Context:

  • Motor impersistence (MI) is defined as the inability to sustain simple voluntary acts.
  • Previous research has debated its association with nondominant hemisphere damage.
  • Discrepancies may stem from differing definitions of MI.

Purpose:

  • To clarify the relationship between specific features of motor impersistence and hemispheric lateralization.
  • To investigate the neurological basis of MI, particularly the inability to perform multiple acts concurrently.

Summary:

  • This study defines motor impersistence (MI) as the inability to protrude the tongue with eyes closed.
  • This specific definition strongly correlates with damage to the right hemisphere.
  • Lesions in area 6 or 8 within the right middle cerebral artery territory are implicated.

Impact:

  • Provides a refined understanding of motor impersistence and its neurological underpinnings.
  • Contributes to the localization of brain lesions associated with specific neurological deficits.
  • Enhances diagnostic capabilities for conditions involving motor control and hemispheric function.

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