Document Detail


Relevance of hand dominance to the bilateral deficit phenomenon.
MedLine Citation:
PMID:  22532257     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
During maximal voluntary contractions, the sum of forces exerted by homonymous muscles when activated unilaterally (UL) is, typically, larger than the sum of forces when activated bilaterally (BL). This phenomenon is known as the bilateral deficit (BLD). Our purpose was to determine if the dominant limb would be inhibited to a greater degree in the BL condition, thereby reducing any disparity in force output between the limbs. Maximum voluntary handgrip strength was measured in 40 left-handed and 40 right-handed individuals under both BL and UL conditions. The right-handers displayed 10.4 % greater right hand strength in both conditions; the left-handers exhibited 5.5 % greater left hand strength in the UL and 4.3 % in the BL condition. A BLD (-1.30 %) was present in the left-handed group only but a reduction in the force disparity between the hands was not evident. It was observed, however, that seven individuals from each group exhibited greater UL force with their non-dominant hand. Accordingly, we re-analyzed the data after rearranging the groups based on unilateral hand grip strength dominance. A significant reduction in force disparity between the hands occurred for the left-handed group only, the result of a significant inhibition of the stronger left hand. A trend towards a similar reduction occurred for the right-handers because of a significant force reduction of the stronger right hand. Consequently, it appears that for maximum handgrip contractions, the BLD may be related to preferential inhibition of the stronger hand, especially for individuals who are left-hand-strength-dominant in terms of unilateral force output.
Authors:
Andrew Cornwell; Nazareth Khodiguian; Eun Jung Yoo
Related Documents :
7708177 - Clinical case report: opiate antagonist and event-related desynchronization in 2 autist...
1187297 - Determinants of visual attention in real-wound scenes.
12901397 - Stronger suboptimal than optimal affective priming?
18704797 - Where is the effect of frequency in word production? insights from aphasic picture-nami...
16481567 - Nocturnal colour vision--not as rare as we might think.
24601567 - Case-encapsulated triboelectric nanogenerator for harvesting energy from reciprocating ...
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-4-25
Journal Detail:
Title:  European journal of applied physiology     Volume:  -     ISSN:  1439-6327     ISO Abbreviation:  -     Publication Date:  2012 Apr 
Date Detail:
Created Date:  2012-4-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100954790     Medline TA:  Eur J Appl Physiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
School of Kinesiology and Nutritional Science, California State University, Los Angeles, 5151 State University Drive, Los Angeles, CA, 90032, USA, acornwe@calstatela.edu.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

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


Previous Document:  Supratrigonal cystectomy with hautmann pouch as treatment for neurogenic bladder in spinal cord inju...
Next Document:  Pseudoaneurysm of the superior thyroid artery following revision tracheostomy.