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Cortical reorganization of hand motor function to primary sensory cortex in hemiparetic patients with a primary motor cortex infarct.

Abstract：

OBJECTIVE:To show cortical reorganization in hemiparetic patients with a primary motor cortex (M1) infarct including the precentral knob by using functional magnetic resonance imaging (fMRI). DESIGN:Case-control. SETTING:Outpatient clinics in the rehabilitation department of a university hospital. PARTICIPANTS:Two stroke patients and 20 control subjects. INTERVENTIONS:By using fMRI, we evaluated the hand motor function of 2 hemiparetic stroke patients, who had made some recovery from complete paralysis of the affected hand, and 20 control subjects. MAIN OUTCOME MEASURES:fMRI was performed by using the blood oxygen level-dependent technique at 1.5 T with a standard head coil. The motor task paradigm consisted of hand grasp-release movements. RESULTS:The contralateral primary sensorimotor cortex was activated by the hand movements of the control subjects and of the unaffected side of the 2 patients. Only the contralateral (infarct side) primary sensory cortex (S1) was activated by the movements of the affected hand of the 2 patients, a result that was not observed in the control subjects or with the unaffected hand in the stroke patients. CONCLUSIONS:The hand motor function associated with the infarcted M1 in our patients was reorganized into the S1. These results suggest cortical reorganization in patients with an M1 infarct.

journal_name

Arch Phys Med Rehabil

journal_title

Archives of physical medicine and rehabilitation

authors

Jang SH,Ahn SH,Yang DS,Lee DK,Kim DK,Son SM

doi

10.1016/j.apmr.2004.11.043

subject

Has Abstract

pub_date

2005-08-01 00:00:00

pages

1706-8

issue

8

eissn

0003-9993

issn

1532-821X

pii

S0003-9993(05)00182-6

journal_volume

86

pub_type

杂志文章

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