MUSCLE SHORTENING HEAT: ENERGY DISSIPATION DUE TO STRUCTURAL DAMPING.
Abstract
The paper presents a study to predict theoretically the main source and effect of structural damping in the contractile component of muscle. The most obvious sources is the coulomb friction effects at the contact sites between the myosin cross-bridges and the actin filaments. The equation derived for the energy dissipated during filament sliding due to the friction at these sites is Energy dissipation = (pPo + qP)x. Since this expression agrees with A. V. Hill's (1964a) equation for heat of shortening, it is concluded that heat of shortening is a structural damping phenomenon. The interface tension theory presented in the preceding paper (Metherell, 1966) is modified to take account of these structural damping effects. The energy relation, when taking account of the strain energy h stored in the series elastic component, is shown to be E = A + alpha x + We + h which is the same as the equation that Hill (1964c) obtained experimentally. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1966
- Accession Number
- AD0644988
Entities
People
- Alexander F. Metherell
Organizations
- Douglas