20189180

Source:http://linkedlifedata.com/resource/pubmed/id/20189180

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Predicate	Object
rdf:type	pubmed:Citation
lifeskim:mentions	umls-concept:C0013879, umls-concept:C0080194, umls-concept:C0242692, umls-concept:C0376706, umls-concept:C0439855, umls-concept:C0870071, umls-concept:C1704412
pubmed:issue	7
pubmed:dateCreated	2010-4-20
pubmed:abstractText	A finite element model was used to investigate the counter-intuitive experimental observation that some regions of the aponeuroses of a loaded and contracting muscle may shorten rather than undergo an expected lengthening. The model confirms the experimental findings and suggests that pennation angle plays a significant role in determining whether regions of the aponeuroses stretch or shorten. A smaller pennation angles (25 degrees ) was accompanied by aponeurosis lengthening whereas a larger pennation angle (47 degrees ) was accompanied by mixed strain effects depending upon location along the length of the aponeurosis. This can be explained by the Poisson effect during muscle contraction and a Mohr's circle analogy. Constant volume constraint requires that fiber cross sectional dimensions increase when a fiber shortens. The opposing influences of these two strains upon the aponeurosis combine in proportion to the pennation angle. Lower pennation angles emphasize the influence of fiber shortening upon the aponeurosis and thus favor aponeurosis compression, whereas higher pennation angles increase the influence of cross sectional changes and therefore favor aponeurosis stretch. The distance separating the aponeuroses was also found to depend upon pennation angle during simulated contractions. Smaller pennation angles favored increased aponeurosis separation larger pennation angles favored decreased separation. These findings caution that measures of the mechanical properties of aponeuroses in intact muscle may be affected by contributions from adjacent muscle fibers and that the influence of muscle fibers on aponeurosis strain will depend upon the fiber pennation angle.
pubmed:grant	http://linkedlifedata.com/resource/pubmed/grant/R01 AR-53343, http://linkedlifedata.com/resource/pubmed/grant/R01 AR053343-04
pubmed:commentsCorrections	http://linkedlifedata.com/resource/pubmed/commentcorrection/20189180-10098710, http://linkedlifedata.com/resource/pubmed/commentcorrection/20189180-10968943, http://linkedlifedata.com/resource/pubmed/commentcorrection/20189180-11744651, http://linkedlifedata.com/resource/pubmed/commentcorrection/20189180-11784540, http://linkedlifedata.com/resource/pubmed/commentcorrection/20189180-12015351, http://linkedlifedata.com/resource/pubmed/commentcorrection/20189180-12163314, http://linkedlifedata.com/resource/pubmed/commentcorrection/20189180-12476981, http://linkedlifedata.com/resource/pubmed/commentcorrection/20189180-12857769, http://linkedlifedata.com/resource/pubmed/commentcorrection/20189180-1517262, http://linkedlifedata.com/resource/pubmed/commentcorrection/20189180-15713285, http://linkedlifedata.com/resource/pubmed/commentcorrection/20189180-15972213, http://linkedlifedata.com/resource/pubmed/commentcorrection/20189180-16085074, http://linkedlifedata.com/resource/pubmed/commentcorrection/20189180-16102996, http://linkedlifedata.com/resource/pubmed/commentcorrection/20189180-16453292, http://linkedlifedata.com/resource/pubmed/commentcorrection/20189180-18703759, http://linkedlifedata.com/resource/pubmed/commentcorrection/20189180-1880137, http://linkedlifedata.com/resource/pubmed/commentcorrection/20189180-18821605, http://linkedlifedata.com/resource/pubmed/commentcorrection/20189180-19550204, http://linkedlifedata.com/resource/pubmed/commentcorrection/20189180-2676342, http://linkedlifedata.com/resource/pubmed/commentcorrection/20189180-5749049, http://linkedlifedata.com/resource/pubmed/commentcorrection/20189180-5921536, http://linkedlifedata.com/resource/pubmed/commentcorrection/20189180-6051170, http://linkedlifedata.com/resource/pubmed/commentcorrection/20189180-722527, http://linkedlifedata.com/resource/pubmed/commentcorrection/20189180-9763648
pubmed:language	eng
pubmed:journal	http://linkedlifedata.com/resource/pubmed/journal/0157375
pubmed:citationSubset	IM
pubmed:status	MEDLINE
pubmed:month	May
pubmed:issn	1873-2380
pubmed:author	pubmed-author:ChenJiun-ShyanJS, pubmed-author:ChiSheng-WeiSW, pubmed-author:HodgsonJohnJ, pubmed-author:Reggie EdgertonVV, pubmed-author:RoizRonald ARA, pubmed-author:ShinDavid DDD, pubmed-author:SinhaShantanuS
pubmed:copyrightInfo	Published by Elsevier Ltd.
pubmed:issnType	Electronic
pubmed:day	7
pubmed:volume	43
pubmed:owner	NLM
pubmed:authorsComplete	Y
pubmed:pagination	1243-50
pubmed:dateRevised	2011-7-28
pubmed:meshHeading	pubmed-meshheading:20189180-Animals, pubmed-meshheading:20189180-Finite Element Analysis, pubmed-meshheading:20189180-Humans, pubmed-meshheading:20189180-Models, Biological, pubmed-meshheading:20189180-Muscle, Skeletal, pubmed-meshheading:20189180-Muscle Contraction
pubmed:year	2010
pubmed:articleTitle	Finite element modeling reveals complex strain mechanics in the aponeuroses of contracting skeletal muscle.
pubmed:affiliation	Department of Civil and Environmental Engineering Department, University of California at Los Angeles(UCLA), 5713 Boelter Hall, Los Angeles, CA 90095-1593, USA.
pubmed:publicationType	Journal Article, Research Support, N.I.H., Extramural