Linked Life Data

7787115

Source:http://linkedlifedata.com/resource/pubmed/id/7787115

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4 Suppl
pubmed:dateCreated
1995-7-27
pubmed:abstractText
Changes in the x-ray diffraction patterns produced by 100-microseconds-length steps imposed during tetanic stimulation were recorded from single intact fibers of frog tibialis anterior muscle. For shortening steps, a staircase length change was applied, with a 20-ms interval between steps. For stretches, each 20-ms cycle started with a stretch, followed after 4 ms by shortening to the original length. Each shortening step in the staircase and each stretch in the stretch/shortening protocol produced a response similar to that of a single step from the isometric steady state. The intensity of the 14.5-nm x-ray reflection arising from the axial repeat of the myosin heads along their filaments decreased after both shortening and stretch; this decrease was not accompanied by broadening along or across the meridian. The relationship between the intensity after the length step and step amplitude was approximately linear for both stretches and shortening steps, extrapolating to zero intensity for 11-nm stretches and 13-nm shortening steps, but there was no significant intensity change for the first approximately 2 nm of shortening. These results are broadly consistent with conventional models of muscle contraction in which myosin heads move through about 10 nm during the working stroke in the shortening direction, but an additional distortion of the myosin heads may be produced by a stretch.
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/7787115-1501149, http://linkedlifedata.com/resource/pubmed/commentcorrection/7787115-1538750, http://linkedlifedata.com/resource/pubmed/commentcorrection/7787115-1579164, http://linkedlifedata.com/resource/pubmed/commentcorrection/7787115-2100305, http://linkedlifedata.com/resource/pubmed/commentcorrection/7787115-302333, http://linkedlifedata.com/resource/pubmed/commentcorrection/7787115-4181952, http://linkedlifedata.com/resource/pubmed/commentcorrection/7787115-4391323, http://linkedlifedata.com/resource/pubmed/commentcorrection/7787115-4939977, http://linkedlifedata.com/resource/pubmed/commentcorrection/7787115-5884645, http://linkedlifedata.com/resource/pubmed/commentcorrection/7787115-6604821, http://linkedlifedata.com/resource/pubmed/commentcorrection/7787115-8316857, http://linkedlifedata.com/resource/pubmed/commentcorrection/7787115-8316858, http://linkedlifedata.com/resource/pubmed/commentcorrection/7787115-949387
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0006-3495
pubmed:author
pubmed:issnType
Print
pubmed:volume
68
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
92S-96S; discussion 96S-98S
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed:year
1995
pubmed:articleTitle
Changes in the x-ray diffraction pattern from single, intact muscle fibers produced by rapid shortening and stretch.
pubmed:affiliation
Dipartimento di Scienze Fisiologiche, Università degli Studi di Firenze, Italy.
pubmed:publicationType
Journal Article, In Vitro, Research Support, Non-U.S. Gov't