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rdf:type | |
lifeskim:mentions | |
pubmed:dateCreated |
1993-6-10
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pubmed:abstractText |
1. The skeleto-fusimotor or beta innervation was compared in cat peroneus brevis and peroneus tertius muscles, which differ in their composition of fatigue-resistant motor units; the slow (S) units predominate in brevis and the fast units (FR) in tertius. 2. In four brevis muscles, of thirty-four beta-axons (from a total of 114 axons supplying extrafusal muscle fibres) twenty-nine were dynamic (beta D) and only five static (beta S). In contrast, in three tertius muscles, of twenty-five beta-axons (from a total of 82 axons) twelve were static and thirteen dynamic. 3. In a population of thirty-five brevis and thirty tertius spindles, the proportion of beta D-innervated spindles was greater in the brevis (68.5%) than in the tertius (50%) whereas that of beta S-innervated spindles was greater in the tertius (40%) than in the brevis (17.1%). In a population of thirty-two brevis and twenty-seven tertius spindles in which the presence of bag1 fibres was deduced from the existence of a dynamic innervation, the proportion of spindles innervated by beta D-axons was 80% in the brevis and 62% in the tertius. 4. In both muscles, the number of beta D effects was greater than that of beta S effects. beta S-axons were rarely found to supply more than one spindle whereas beta D-axons supplying more than one spindle (up to four) were common. Spindles were often coinnervated by beta D- and beta S-axons.(ABSTRACT TRUNCATED AT 250 WORDS)
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pubmed:commentsCorrections |
http://linkedlifedata.com/resource/pubmed/commentcorrection/1302277-130468,
http://linkedlifedata.com/resource/pubmed/commentcorrection/1302277-140933,
http://linkedlifedata.com/resource/pubmed/commentcorrection/1302277-142128,
http://linkedlifedata.com/resource/pubmed/commentcorrection/1302277-142145,
http://linkedlifedata.com/resource/pubmed/commentcorrection/1302277-154938,
http://linkedlifedata.com/resource/pubmed/commentcorrection/1302277-1798039,
http://linkedlifedata.com/resource/pubmed/commentcorrection/1302277-2299381,
http://linkedlifedata.com/resource/pubmed/commentcorrection/1302277-2958438,
http://linkedlifedata.com/resource/pubmed/commentcorrection/1302277-3198800,
http://linkedlifedata.com/resource/pubmed/commentcorrection/1302277-3418525,
http://linkedlifedata.com/resource/pubmed/commentcorrection/1302277-4148752,
http://linkedlifedata.com/resource/pubmed/commentcorrection/1302277-4219341,
http://linkedlifedata.com/resource/pubmed/commentcorrection/1302277-5499818,
http://linkedlifedata.com/resource/pubmed/commentcorrection/1302277-6213764,
http://linkedlifedata.com/resource/pubmed/commentcorrection/1302277-6704739,
http://linkedlifedata.com/resource/pubmed/commentcorrection/1302277-726924
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pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:status |
MEDLINE
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pubmed:month |
Dec
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pubmed:issn |
0022-3751
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:volume |
458
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
519-25
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pubmed:dateRevised |
2010-9-7
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pubmed:meshHeading |
pubmed-meshheading:1302277-Action Potentials,
pubmed-meshheading:1302277-Animals,
pubmed-meshheading:1302277-Axons,
pubmed-meshheading:1302277-Cats,
pubmed-meshheading:1302277-Hindlimb,
pubmed-meshheading:1302277-Motor Neurons, Gamma,
pubmed-meshheading:1302277-Muscles,
pubmed-meshheading:1302277-Neural Conduction
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pubmed:year |
1992
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pubmed:articleTitle |
Comparison of skeleto-fusimotor innervation in cat peroneus brevis and peroneus tertius muscles.
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pubmed:affiliation |
Laboratoire de Neurophysiologie, Collège de France, Paris.
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pubmed:publicationType |
Journal Article,
Comparative Study,
Research Support, Non-U.S. Gov't
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