4.7 Article

Motor cortex activation during treatment may predict therapeutic gains in paretic hand function after stroke

期刊

STROKE
卷 37, 期 6, 页码 1552-1555

出版社

LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1161/01.STR.0000221281.69373.4e

关键词

magnetic resonance imaging; rehabilitation

资金

  1. NCRR NIH HHS [RR12169, RR08655, RR13642] Funding Source: Medline
  2. NICHD NIH HHS [R24 HD 39629] Funding Source: Medline
  3. NINDS NIH HHS [R01 NS045485, NS 45485] Funding Source: Medline

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Background and Purpose - Functional brain imaging after stroke offers insight into motor network adaptations. This exploratory study examined whether motor cortical activation captured during arm-focused therapy can predict paretic hand functional gains. Methods - Eight hemiparetic patients had serial functional MRI (fMRI) while performing a pinch task before, midway, and after 2 weeks of constraint-induced therapy. The Wolf Motor Function Test (WMFT) was performed before and after intervention. Results - There was a linear reduction in ipsilateral (contralesional) primary motor (M1) activation (voxel counts) across time. The midpoint M1 Laterality Index anticipated post-therapeutic change in time to perform the WMFT. The change in ipsilateral M1 voxel count (pre- to mid-) correlated with the change in mean WMFT time (pre- to post-). Conclusions - The relationship between brain activation during treatment and functional gains suggests a use for serial fMRI in predicting the success and optimal duration for a focused therapeutic intervention.

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