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Changes in the execution of a complex manual task after ipsilateral ischemic cerebral hemispheric stroke
1Service de Rééducation et de Réadaptation Fonctionnelles, groupe hospitalier Lariboisiére-Fernand Widal-Saint Lazare, Paris, France.
Archives of Physical Medicine and Rehabilitation
|August 1, 1996
Summary
Hemiplegic patients exhibit ipsilateral motor disturbances in complex manual tasks after stroke, regardless of hemisphere damaged. Right hemisphere damage may impair speed control, leading to clumsiness.
Area of Science:
- Neuroscience
- Rehabilitation Medicine
- Motor Control
Background:
- Hemispheric stroke often leads to motor deficits.
- Previous assumptions suggested ipsilateral motor control remains unaffected after stroke.
Purpose of the Study:
- To investigate behavioral adaptation in hemiplegic patients performing a complex manual task.
- To determine if ipsilateral motor disturbances occur after hemispheric stroke, even without time constraints.
Main Methods:
- 36 ischemic stroke patients (18 LHD, 18 RHD) and 86 controls performed two manual tasks: Nine-Hole Peg Test (NHPT) and a novel "Pig-Tail" task.
- Data collected included number of faults and time to complete tasks.
- Performance was compared between patient groups and controls.
Main Results:
- Patients performed worse than controls on the NHPT, irrespective of lesion side.
- Patients made more faults than controls on the "Pig-Tail" task.
- Right hemisphere damage (RHD) patients were clumsy but faster than left hemisphere damage (LHD) patients; LHD patients showed slower task completion times.
Conclusions:
- Ipsilateral motor disturbances are present in complex manual tasks post-hemispheric stroke, irrespective of the damaged hemisphere.
- Speed control may be impaired by right hemisphere damage, contributing to observed clumsiness.
- Further research is needed to explore the role of speed control deficits.