Document Detail

Conduction and morphological changes in wrist nerves immediately after bilateral sanding exercises in hemiparetic subjects.
MedLine Citation:
PMID:  22024325     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To investigate the immediate effects of bilateral upper-extremity sanding exercises on conduction and morphologic characteristics of the median and ulnar nerves at the wrist in hemiparetic subjects and control subjects.
DESIGN: Case control study using a pretest-post-test design.
SETTING: Inpatient rehabilitation department affiliated with a teaching hospital.
PATIENTS (OR PARTICIPANTS): Thirty hemiparetic subjects and 21 matched control subjects who met our inclusion criteria and had no history of diseases that may have predisposed them to peripheral neuropathies were recruited for this study.
METHODS: Bilateral nerve conduction tests and ultrasonographic evaluations were performed on each subject before and immediately after a 30-minute bilateral sanding exercise with a frequency of 5 repetitions per minute.
MAIN OUTCOME MEASUREMENTS: The effects of exercises on bilateral median and ulnar wrist nerves were assessed with the use of sensory and motor nerve conduction velocity tests and by width/thickness ratios in ultrasonographic evaluations.
RESULTS: In the hemiparesis group, the pre-exercise amplitude of the motor component for the median and ulnar nerves were respectively lower than the corresponding values in the control group (P < .05), whereas the pre-exercise amplitude and velocity of the sensory component were lower than the corresponding values in the control group (P < .01). After the exercise, the assessments for the affected side showed reductions in the conduction velocity of the sensory component and an increase in the width/thickness ratio for the median nerve (P < .05).
CONCLUSIONS: The median and ulnar nerves at the wrist in hemiparetic subjects before sanding exercises showed different conduction characteristics compared with control subjects. Their affected side also demonstrated significant conduction and morphologic changes after the exercises. These subclinical findings may be attributed to different mechanisms such as overuse, spasticity, and demyelinating changes. Prevention of these subclinical changes is recommended to enhance exercise safety in hemiparetic patients.
Yung-Cheng Huang; Lin-Chien Lee; Fu-Kong Lieu; Min-Yi Fu; Chein-Wei Chang; Hsing-Kuo Wang
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  PM & R : the journal of injury, function, and rehabilitation     Volume:  3     ISSN:  1934-1563     ISO Abbreviation:  PM R     Publication Date:  2011 Oct 
Date Detail:
Created Date:  2011-10-25     Completed Date:  2012-02-28     Revised Date:  2014-11-13    
Medline Journal Info:
Nlm Unique ID:  101491319     Medline TA:  PM R     Country:  United States    
Other Details:
Languages:  eng     Pagination:  933-9     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 American Academy of Physical Medicine and Rehabilitation. Published by Elsevier Inc. All rights reserved.
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MeSH Terms
Exercise Therapy / methods*
Follow-Up Studies
Median Nerve / physiopathology*
Middle Aged
Muscle Contraction
Muscle, Skeletal / innervation,  physiopathology,  ultrasonography
Neural Conduction / physiology
Paresis / complications,  physiopathology*,  rehabilitation
Peripheral Nervous System Diseases / etiology,  physiopathology*,  rehabilitation
Retrospective Studies
Treatment Outcome
Ulnar Nerve / physiopathology*
Wrist / innervation*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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