Motion perception deficits from midline cerebellar lesions in human

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Abstract

Although visual motion processing is commonly thought to be mediated solely by visual cortical areas, this human lesion study suggests that the cerebellum also has a role. We found motion direction discrimination deficits in a group of patients with acute midline cerebellar lesions. Unlike normals and patients with hemispheric cerebellar lesions, these patients with midline lesions were unable to discern a global motion vector in a local stochastic motion display. This resembles the perceptual defect reported following cortical area MT lesions in primates. This motion perception deficit may result from damage to a cerebellar mechanism involved in perceptual stabilization. Disruption of this comparator mechanism is sufficient to produce a severe motion perception deficit even though cortical visual processing mechanisms are still intact.

Original languageEnglish (US)
Pages (from-to)723-731
Number of pages9
JournalVision research
Volume35
Issue number5
DOIs
StatePublished - Mar 1995

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Keywords

  • Brain lesions
  • Cerebellum
  • Cortical circuits
  • Motion perception
  • Subcortical circuits

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems

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