Deficits of position sense, unilateral neglect and optokinetic stimulation

Research output: Contribution to journalArticle

Abstract

The effects of optokinetic stimulation on position sense disorders were investigated in a series of 30 patients with unilateral vascular lesions (10 right brain-damaged patients with visuo-spatial hemineglect, 10 right brain-damaged patients without visuo-spatial hemineglect, 10 left brain- damaged patients), and 10 control subjects. The position sense deficit was more severe in right brain- damaged patients with neglect, where both the contralateral and the ipsilateral arm were involved. Optokinetic stimulation was effective only in right brain-damaged patients with neglect: stimulation with a leftward movement (contralateral to the side of the hemispheric lesion) improved the position sense deficit, while stimulation with a rightward (ipsilateral) movement produced a worsening of the performance level. These findings suggest that in right brain-damaged patients with neglect the position sense deficit has a nonsensory component, related to neglect, which may be affected by optokinetic stimulation. The role of the derangement of sensory and perceptual-egocentric representations of the body and of extrapersonal space in producing position sense disorders is discussed.

Original languageEnglish
Pages (from-to)1191-1200
Number of pages10
JournalNeuropsychologia
Volume31
Issue number11
DOIs
Publication statusPublished - 1993

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Proprioception
Somatosensory Disorders
Brain
Body Image
Blood Vessels

ASJC Scopus subject areas

  • Behavioral Neuroscience
  • Neuropsychology and Physiological Psychology

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Deficits of position sense, unilateral neglect and optokinetic stimulation. / Vallar, Giuseppe; Antonucci, Gabriella; Guariglia, Cecilia; Pizzamiglio, Luigi.

In: Neuropsychologia, Vol. 31, No. 11, 1993, p. 1191-1200.

Research output: Contribution to journalArticle

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