Relationship between muscle tension and hardness in isolated frog muscle with electrical stimulation

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Muscle hardness increases as the contractile level increases. This increase is caused by changes in structure of the muscle fiber and blood flow; however, the mechanism of increasing hardness has not been clearly demonstrated. The objective of this study was to investigate the relationship between isolated frog muscle tension and hardness. Gastrocnemius muscles were mounted horizontally in a chamber. The femur was fixed, and the Achilles tendon was attached to a stretching device. The muscle tension and hardness were measured during various muscle stretches and with and without electrical stimulation. We applied two protocols. In the first, the muscle was stimulated and then stretched, whereas, in the second, it was stretched and then stimulated. The muscle hardness was proportional to the muscle tension at each amount of stretching in both protocols. There were no significant differences between protocols 1 and 2, although the stretch enhancement of the muscle force was expected in protocol 1. In our experiments, the muscle length corresponds to the ascending limb of the length-tension curves of a sarcomere. The results of this study suggest that the relationship between muscle tension and hardness was not affected by the stretch enhancement in the ascending limb of the length-tension curve. The slope of the regression line between the muscle tension and hardness decreased as the amount of the stretch increased. The decrease of the slope might be caused by structural changes in the filaments.

Original languageEnglish
Title of host publicationAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
Pages4818-4821
Number of pages4
DOIs
Publication statusPublished - 2007
Event29th Annual International Conference of IEEE-EMBS, Engineering in Medicine and Biology Society, EMBC'07 - Lyon, France
Duration: 2007 Aug 232007 Aug 26

Other

Other29th Annual International Conference of IEEE-EMBS, Engineering in Medicine and Biology Society, EMBC'07
CountryFrance
CityLyon
Period07/8/2307/8/26

Fingerprint

Muscle
Hardness
Stretching
Tendons
Blood
Fibers

ASJC Scopus subject areas

  • Biomedical Engineering

Cite this

Uchiyama, T., Kato, R., & Murayama, M. (2007). Relationship between muscle tension and hardness in isolated frog muscle with electrical stimulation. In Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings (pp. 4818-4821). [4353418] https://doi.org/10.1109/IEMBS.2007.4353418

Relationship between muscle tension and hardness in isolated frog muscle with electrical stimulation. / Uchiyama, Takanori; Kato, Ryoko; Murayama, Mitsuyoshi.

Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings. 2007. p. 4818-4821 4353418.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Uchiyama, T, Kato, R & Murayama, M 2007, Relationship between muscle tension and hardness in isolated frog muscle with electrical stimulation. in Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings., 4353418, pp. 4818-4821, 29th Annual International Conference of IEEE-EMBS, Engineering in Medicine and Biology Society, EMBC'07, Lyon, France, 07/8/23. https://doi.org/10.1109/IEMBS.2007.4353418
Uchiyama T, Kato R, Murayama M. Relationship between muscle tension and hardness in isolated frog muscle with electrical stimulation. In Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings. 2007. p. 4818-4821. 4353418 https://doi.org/10.1109/IEMBS.2007.4353418
Uchiyama, Takanori ; Kato, Ryoko ; Murayama, Mitsuyoshi. / Relationship between muscle tension and hardness in isolated frog muscle with electrical stimulation. Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings. 2007. pp. 4818-4821
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