Document Detail

Effects of paraspinal fatigue on lower extremity motoneuron excitability in individuals with a history of low back pain.
MedLine Citation:
PMID:  21388827     Owner:  NLM     Status:  Publisher    
Individuals with low back pain (LBP) have been shown to demonstrate decreased quadriceps activation following lumbar paraspinal fatigue. The response of other lower extremity muscles is unknown. The purpose of this study was to determine changes in motoneuron pool excitability of the vastus medialis, fibularis longus, and soleus following lumbar paraspinal fatigue in individuals with and without a history of LBP. A controlled laboratory study was used to compare motoneuron pool excitability before and after a lumbar paraspinal fatiguing exercise. Twenty individuals (10 with history of LBP) performed isometric lumbar paraspinal exercise until a 25% shift in paraspinal muscle surface electromyography median frequency occurred. Motoneuron pool excitability, using H/M ratios of the vastus medialis, fibularis longus, and soleus before and immediately after a lumbar paraspinal fatiguing exercise. There was a significant (P=.03) increase of 15% in soleus H/M ratio in both groups following lumbar paraspinal fatigue. Neither group demonstrated changes in vastus medialis (P=.80) or fibularis longus (P=.86). Soleus motoneuron pool excitability increased following lumbar paraspinal fatigue independent of group allocation and occurred in the absence of changes in vastus medialis or fibularis longus muscles. Increased soleus motoneuron pool excitability may be a postural response to preserve lower extremity function.
Elizabeth A Bunn; Terry L Grindstaff; Joseph M Hart; Jay Hertel; Christopher D Ingersoll
Related Documents :
2691817 - Exercise training produces changes in free and conjugated catecholamines.
426097 - Plasma volume and electrolyte shifts with heavy exercise in sitting and supine positions.
18978607 - Plasma ammonia concentrations and the slow component of oxygen uptake kinetics during c...
18614887 - Practical management of exercise-associated hyponatremic encephalopathy: the sodium par...
18821267 - Influence of recovery intensity on time spent at maximal oxygen uptake during an interm...
18065147 - Barriers and facilitators to exercise among stroke survivors.
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-3-7
Journal Detail:
Title:  Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology     Volume:  -     ISSN:  1873-5711     ISO Abbreviation:  -     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-3-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9109125     Medline TA:  J Electromyogr Kinesiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011 Elsevier Ltd. All rights reserved.
College of Physical Activity and Sport Sciences, West Virginia University, Morgantown, WV, United States.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

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

Previous Document:  Cloning, expression, and immunogenicity of novel fusion protein of Mycobacterium tuberculosis based ...
Next Document:  Quality of Life after Ischemic Stroke Varies in Western Countries: Data from the Tinzaparin in Acute...