Source:http://linkedlifedata.com/resource/pubmed/id/16992308
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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
1
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| pubmed:dateCreated |
2010-6-29
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| pubmed:abstractText |
1. A method is described for resolving isometric tetanic tension developed by fast-twitch and slow-graded components of heterogeneous toad muscles. This makes use of the difference in threshold for excitation of low threshold nerve fibres which normally innervate the fast-twitch muscle fibres and high threshold nerve fibres which innervate slow-graded muscle fibres.2. The sartorius muscle contains only fast-twitch muscle fibres whereas the posterior semitendinosus (PST) contains both fast-twitch and slow-graded muscle fibres, the latter contributing 10-15% of the maximum isometric tetanic tension.3. Following surgical cross-union of nerve to sartorius and PST muscles, both the fast-twitch and slow-graded muscle fibre components of the PST are reinnervated by low threshold nerves originally innervating sartorius fast-twitch fibres, and sartorius fast-twitch muscle fibres are reinnervated by both low threshold and high threshold nerves formerly supplying the fast-twitch and slow-graded muscle fibre components of the PST.4. The characteristic mechanical responses of fast-twitch muscle fibres and slow-graded muscle fibres were not transformed up to 134 and 200 days respectively following nerve cross-union.5. PST nerve partially innervated the sartorius muscle whereas sartorius nerves completely innervated the PST muscle. Isometric tetanic tension declined markedly during repetitive indirect stimulation of cross-innervated sartorius muscles, whereas the tetanic contractions of cross-innervated PST showed a plateau of tension and resembled the response of normal muscles.6. Normal, cross-innervated and self-innervated PST muscles gave sustained contractures in the presence of acetylcholine whereas PST muscles denervated for 120 days gave phasic contractures similar to those of normal, cross-innervated and self-innervated sartorius muscles.
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| pubmed:commentsCorrections |
http://linkedlifedata.com/resource/pubmed/commentcorrection/16992308-13085337,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16992308-13431865,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16992308-13514717,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16992308-13713901,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16992308-13770626,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16992308-13805874,
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http://linkedlifedata.com/resource/pubmed/commentcorrection/16992308-13872154,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16992308-14286768,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16992308-14298123,
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http://linkedlifedata.com/resource/pubmed/commentcorrection/16992308-16992291,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16992308-17105015,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16992308-17105070,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16992308-17820987,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16992308-5840137,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16992308-5861726,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16992308-5922136,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16992308-6047792,
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http://linkedlifedata.com/resource/pubmed/commentcorrection/16992308-6065880
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| pubmed:language |
eng
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| pubmed:journal | |
| pubmed:status |
PubMed-not-MEDLINE
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| pubmed:month |
Sep
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| pubmed:issn |
0022-3751
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| pubmed:author | |
| pubmed:issnType |
Print
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| pubmed:volume |
198
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| pubmed:owner |
NLM
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| pubmed:authorsComplete |
Y
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| pubmed:pagination |
103-25
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| pubmed:dateRevised |
2010-9-15
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| pubmed:year |
1968
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| pubmed:articleTitle |
Effects of nerve cross-union on fast-twitch and slow-graded muscle fibres in the toad.
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| pubmed:publicationType |
Journal Article
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