Document Detail

Characterizing coordination of grasp and twist in hand function of healthy and post-stroke subjects.
MedLine Citation:
PMID:  24187217     Owner:  NLM     Status:  In-Data-Review    
The goal of this study was to characterize the coordination of grasp and twist in hand function of normal and post-stroke subjects using a two degree of freedom hand robot. Results of the analysis of data from eight control subjects indicated that normal grip coordination involves the linear modulation of grip force with load torque. Thus, there was a high correlation between grip force and load torque. Also, the force generated by the thumb was highly correlated with the force generated by the index, middle and ring fingers. Finally, the safety margin used to stabilize grasp and avoid slip was consistent across normal subjects. In contrast, results from chronic post-stroke subjects indicated that they generally: (1) exerted excessive grip force to stabilize grasp using their ipsilesional hand; (2) lost the close amplitude coupling between grip force and load torque; and (3) lost the close modulation of the thumb force with finger force. These results suggest that our methods may provide objective, quantitative means of characterizing coordination problems following stroke.
Hamed Kazemi; Robert Kearney; Theodore Milner
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  IEEE ... International Conference on Rehabilitation Robotics : [proceedings]     Volume:  2013     ISSN:  1945-7901     ISO Abbreviation:  IEEE Int Conf Rehabil Robot     Publication Date:  2013 Jun 
Date Detail:
Created Date:  2013-11-04     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101260913     Medline TA:  IEEE Int Conf Rehabil Robot     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1-6     Citation Subset:  IM    
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