Imagining the impossibleintact motor representations in hemiplegics
作者:
Scott Johnson,
期刊:
NeuroReport
(OVID Available online 2000)
卷期:
Volume 11,
issue 4
页码: 729-732
ISSN:0959-4965
年代: 2000
出版商: OVID
关键词: Hemiparesis;Hemiplegia;Motor imagery;Motor planning;Stroke rehabilitation
数据来源: OVID
摘要:
Motor imagery is known to involve brain regions vital to the performance of motor skills including primary motor cortex. The present results show that, following cerebral vascular accidents (CVAs) affecting a variety of these regions, many adults with left or right upper-limb paralysis (i.e. hemiparesis/hemiplegia) retain the ability to accurately represent prehensile movements involving the impaired limb. This suggests that during the acute phase of recovery many CVA patients can use motor imagery to activate partially damaged motor networks;a process that may facilitate functional reorganization. This ability was, however, compromised in cases with right posterior parietal or left frontal lesions. This pattern is consistent with the hypothesis that imagined prehension, like actual reaching and grasping, involves a network of highly interconnected areas distributed throughout parietal and frontal cortices.
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