Comparative Study
doi: 10.1007/BF01682144.
Analysis of the birefringence of the smooth muscle anococcygeus of the rat, at rest and in contraction. I
Affiliations
- PMID: 3392188
- DOI: 10.1007/BF01682144
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Comparative Study
Analysis of the birefringence of the smooth muscle anococcygeus of the rat, at rest and in contraction. I
J Muscle Res Cell Motil.
1988 Feb.
Abstract
The birefringence of the rat anococcygeus muscle was measured at rest and in contraction. A large increase (+30%) of the optical retardation was observed in muscles fully stimulated by Noradrenaline, in isometric conditions. This was associated with a reduction of the muscle thickness (-12%), so that the birefringence increased by 48%. These changes were reversed upon relaxation. The relationship between the birefringence increase and the mechanical response was investigated as a function of time and of Noradrenaline concentration. Possible origins for the birefringence increase are considered: an increased density of birefringent material, mainly filaments, seems the most likely explanation of the results.
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