Limb and hemispatial hypometria

Kimford J. Meador, Eugene E. Moore, Roy C. Martin, David W. Loring, David C Hess, Kenneth M. Heilman

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In a previous study, we demonstrated that unilateral cerebral lesions produce hypometric limb movements of the contralateral arm and hemispatial (i.e., directional) hypometria for movements towards contralateral hemispace. In the present study, we investigated 10 patients with right cerebral lesions and 25 healthy controls using a task to uncouple deficits in sensory perceptual systems and motor-action output systems on directional hypometria. This task required participants, with their eyes closed, to reproduce lateral and medial horizontal displacements (15-27 cm) with each arm. Each participant was seated at a waist high table and had their hand placed at an origin point aligned with the axillary fold on the same side. Their hand was moved by the investigator from the origin point to a target point and brought back to the point of origin (input displacement). The participant was then asked to return their hand to either the same target point or to an equidistant target point in the opposite direction. Healthy dextral participants were significantly more hypometric with their right arm, but patients with right cerebral lesions exhibited an opposite pattern with overall left arm hypometria. In addition, patients were significantly more hypometric for movements when output displacements were toward left hemispace. No effect was found for direction of sensory input. The results suggest that the directional hypometria is predominantly produced by hemispatial output deficits.

Original languageEnglish (US)
Pages (from-to)71-75
Number of pages5
JournalJournal of the International Neuropsychological Society
Volume6
Issue number1
DOIs
StatePublished - Jan 1 2000
Externally publishedYes

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Keywords

  • Attention
  • Hypometria
  • Motor
  • Neglect

ASJC Scopus subject areas

  • Neuroscience(all)
  • Clinical Psychology
  • Clinical Neurology
  • Psychiatry and Mental health

Cite this

Meador, K. J., Moore, E. E., Martin, R. C., Loring, D. W., Hess, D. C., & Heilman, K. M. (2000). Limb and hemispatial hypometria. Journal of the International Neuropsychological Society, 6(1), 71-75. https://doi.org/10.1017/S1355617700611086

Limb and hemispatial hypometria. / Meador, Kimford J.; Moore, Eugene E.; Martin, Roy C.; Loring, David W.; Hess, David C; Heilman, Kenneth M.

In: Journal of the International Neuropsychological Society, Vol. 6, No. 1, 01.01.2000, p. 71-75.

Research output: Contribution to journalArticle

Meador, KJ, Moore, EE, Martin, RC, Loring, DW, Hess, DC & Heilman, KM 2000, 'Limb and hemispatial hypometria', Journal of the International Neuropsychological Society, vol. 6, no. 1, pp. 71-75. https://doi.org/10.1017/S1355617700611086
Meador, Kimford J. ; Moore, Eugene E. ; Martin, Roy C. ; Loring, David W. ; Hess, David C ; Heilman, Kenneth M. / Limb and hemispatial hypometria. In: Journal of the International Neuropsychological Society. 2000 ; Vol. 6, No. 1. pp. 71-75.
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