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Motor impersistence

1985; Lippincott Williams & Wilkins; Volume: 35; Issue: 5 Linguagem: Inglês

10.1212/wnl.35.5.662

1526-632X

Andrew Kertesz, I. Nicholson, Andy E.B Cancelliere, Kimberly Kassa, Sandra E. Black,

Motor Control and Adaptation

We studied motor impersistence with a standardized clinical test of sustained actions, both in patients with acute focal stroke lesions, who were matched for age and size of lesion, and normal controls. Patients with right-sided lesions had significantly more impersistence than did those with left-sided lesions. The most discriminating tests were eye-closure, mouth-opening, tongue-protrusion, and gaze to the left. Right central and frontal lesions seemed to be more responsible for motor impersistence than were posterior or left-sided lesions. Although motor impersistence is sometimes seen with diffise cerebral disease, it is also a sign of right-hemisphere lesions; the phenomenon is probably related to mechanisms of directed attention that are necessary to sustain motor activity.