NDLI: Constraints imposed by the lower extremity extensor synergy in chronic hemiparetic stroke: Preliminary findings

Content Provider	IEEE Xplore Digital Library
Author	Sanchez, N. Dewald, J.P.A.
Copyright Year	2014
Description	Author affiliation: Depts. of Phys. Therapy & Human Movement Sci., Northwestern Univ., Chicago, IL, USA (Dewald, J.P.A.) \|\| Depts. of Biomed. Eng. & Phys. Therapy & Human Movement Sci., Northwestern Univ., Chicago, IL, USA (Sanchez, N.)
Abstract	In the present manuscript we implemented the MultiLEIT, a lower extremity isometric torque measurement device to quantify spontaneous joint torque coupling during maximal torque generation in the paretic leg of in chronic hemiparetic stroke. We quantified extension/adduction coupling (coincident with the clinical extension synergy) during the generation of hip extension and ankle plantarflexion maximum voluntary torques. Subjects were then instructed to generate torques outside the synergy by combining hip extension+ hip abduction or ankle plantarflexion + hip abduction. During the hip dual task, the paretic hip torques were significantly different from those measured in the non-paretic and control leg (F = 22.9719, p = 0) and resulted in the inability to generate torques outside the extensor synergy patters. During the dual ankle/ hip task, the paretic extremity generated significantly smaller hip abduction torques compared to controls and to the non-paretic extremity (F = 15.861, p = 0). During this task the paretic extremity was capable of neutralizing the spontaneous adduction torque and generate a net albeit small abduction torque. Results may indicate an increased descending drive from brain stem pathways, particularly during hip extension, responsible for constraints in generating hip abduction torques after stroke.
Sponsorship	IEEE Eng. Med. Biol. Soc.
Starting Page	5804
Ending Page	5807
File Size	904140
Page Count	4
File Format	PDF
ISBN	9781424479290
ISSN	1557170X
DOI	10.1109/EMBC.2014.6944947
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-08-26
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Torque Couplings Hip Joints Knee Muscles
Content Type	Text
Resource Type	Article
Subject	Signal Processing Biomedical Engineering Health Informatics Computer Vision and Pattern Recognition

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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