OCULAR TRACKING MOVEMENTS - ORGANIZATION AND DISTURBANCES IN OCCIPITOPARIETAL LESIONS

  • 1 January 1980
    • journal article
    • research article
    • Vol. 136  (5) , 345-353
Abstract
Disturbances of ipsilateral pursuit movements in unilateral occipitoparietal lesions indicates that each occipitoparietal region controls the ipsilateral slow movement. The study of 7 patients with unilateral occipitoparietal lesions demonstrated that the pursuit (ramp) movement directed towards the lesion is not completely absent; that the tracking is of an extremely fragile nature and overloaded with saccades. Although the disorganization mainly affects the pursuit ipsilateral to the lesion, it also involves the contralateral movement. The concomimitant action of the 2 hemispheres is necessary for smooth pursuit movements to occur, by inhibiting any phasic phenomenon, but each hemisphere is capable of producing pursuit movements in both directions.

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