Abstract
1. A study has been made of some optical and associated mechanical properties of resting frog's sartorius muscles in isotonic and hypertonic solutions. Tension and transparency changes accompanying small alterations of muscle length (smaller than 1-5%) were recorded simultaneously. 2. The form of the transparency change is complex. It has three phases, two of which occur during the length change and the third (delayed phase) after it is complete. Directional recording of the response reveals both scattering and diffraction components. 3. The change of light scattering is associated with tension changes in the short-range elastic component (SREC) of the muscle. Its magnitude is related to the stiffness of the SREC; both increase when the osmotic strength of the external solution is raised and when muscle length is increased. 4. The change of light scattering is not much affected by the velocity of the applied length change. This is true also of the mechanical stiffness of the SREC. 5. The origin of the diffraction change is not known. 6. It is concluded that the scattering effect is caused by conformational changes in the SREC.
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Selected References
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- BLINKS J. R. INFLUENCE OF OSMOTIC STRENGTH ON CROSS-SECTION AND VOLUME OF ISOLATED SINGLE MUSCLE FIBRES. J Physiol. 1965 Mar;177:42–57. doi: 10.1113/jphysiol.1965.sp007574. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Daemers-Lambert C., Debrun F. M., Dethier G., Manil J. Métabolisme des esters phosphorés dans le sartorius de Rana temporaria traité par une solution de Ringer hypertonique. Arch Int Physiol Biochim. 1966 Jun;74(3):374–396. doi: 10.3109/13813456609059918. [DOI] [PubMed] [Google Scholar]
- Endo M. Stretch-induced increase in activation of skinned muscle fibres by calcium. Nat New Biol. 1972 Jun 14;237(76):211–213. doi: 10.1038/newbio237211a0. [DOI] [PubMed] [Google Scholar]
- HILL D. K. The optical properties of resting striated muscle; the effect of rapid stretch on the scattering and diffraction of light. J Physiol. 1953 Mar;119(4):489–500. doi: 10.1113/jphysiol.1953.sp004861. [DOI] [PMC free article] [PubMed] [Google Scholar]
- HILL D. K. The ultra-violet dichroism of living frog's muscle. J Physiol. 1959 Oct;148:379–392. doi: 10.1113/jphysiol.1959.sp006294. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Hill D. K. Changes in transparency of muscle during a twitch. J Physiol. 1949 May 15;108(3):292–302. [PMC free article] [PubMed] [Google Scholar]
- Hill D. K. Tension due to interaction between the sliding filaments in resting striated muscle. The effect of stimulation. J Physiol. 1968 Dec;199(3):637–684. doi: 10.1113/jphysiol.1968.sp008672. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Huxley A. F., Simmons R. M. A capacitance-gauge tension transducer. J Physiol. 1968 Jul;197(1):12P–12P. [PubMed] [Google Scholar]
- Huxley A. F., Simmons R. M. Proposed mechanism of force generation in striated muscle. Nature. 1971 Oct 22;233(5321):533–538. doi: 10.1038/233533a0. [DOI] [PubMed] [Google Scholar]
- Huxley H. E., Brown W. The low-angle x-ray diagram of vertebrate striated muscle and its behaviour during contraction and rigor. J Mol Biol. 1967 Dec 14;30(2):383–434. doi: 10.1016/s0022-2836(67)80046-9. [DOI] [PubMed] [Google Scholar]
- Isaacson A. Caffeine-induced contractures and related calcium movements of muscle in hypertonic media. Experientia. 1969 Dec 15;25(12):1263–1265. doi: 10.1007/BF01897487. [DOI] [PubMed] [Google Scholar]
- Yamada K. The increase in the rate of heat production of frog's skeletal muscle caused by hypertonic solutions. J Physiol. 1970 May;208(1):49–64. doi: 10.1113/jphysiol.1970.sp009105. [DOI] [PMC free article] [PubMed] [Google Scholar]