A KINEMATIC ANALYSIS OF REACHING AND GRASPING MOVEMENTS IN A PATIENT RECOVERING FROM OPTIC ATAXIA

L S JAKOBSON, Y M ARCHIBALD, David Peter Matthew Carey, M A GOODALE

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Abstract

A detailed, kinematic analysis revealed subtle deficits in midline pointing and prehension in a patient showing good clinical signs of recovery from optic ataxia associated with bilateral parieto-occipital damage. Relative to control subjects, the patient tended to misreach to the left with her right hand, and to the right with her left hand on a pointing task. While reach kinematics were otherwise normal in the pointing task, they were markedly disturbed in a prehension task, in which reaching and grasping movements must be integrated. In addition, difficulties in making fine postural adjustments to the hands were still evident 17 months post-injury. These findings suggest an important role for the posterior parietal lobes in programming goal-directed manual movements, and have implications for current theories of motor control and visual perception.

Original languageEnglish
Pages (from-to)803
Number of pages0
JournalNeuropsychologia
Volume29
Issue number8
Publication statusPublished - 1991

Keywords

  • PARIETAL LOBE
  • VISUOMOTOR
  • PREHENSION

Cite this

JAKOBSON, L. S., ARCHIBALD, Y. M., Carey, D. P. M., & GOODALE, M. A. (1991). A KINEMATIC ANALYSIS OF REACHING AND GRASPING MOVEMENTS IN A PATIENT RECOVERING FROM OPTIC ATAXIA. Neuropsychologia, 29(8), 803.