NDLI: Energetics of muscle contraction: further trials

Content Provider	Springer Nature Link
Author	Yamada, Kazuhiro
Copyright Year	2016
Abstract	Knowledge accumulated in the field of energetics of muscle contraction has been reviewed in this article. Active muscle converts chemical energy into heat and work. Therefore, measurements of heat production and mechanical work provide the framework for understanding the process of energy conversion in contraction. In the 1970s, precise comparison between energy output and the associated chemical reactions was performed. It has been found that the two do not match in several situations, resulting in an energy balance discrepancy. More recently, efforts in resolving these discrepancies in the energy balance have been made involving chemical analysis, phosphorus nuclear magnetic resonance spectroscopy, and microcalorimetry. Through reviewing the evidence from these studies, the energy balance discrepancy developed early during isometric contraction has become well understood on a quantitative basis. In this situation energy balance is established when we take into account the binding of Ca to sarcoplasmic proteins such as troponin and parvalbumin, and also the shift of cross-bridge states. On the other hand, the energy balance discrepancy observed during rapid shortening still remains to be clarified. The problem may be related to the essential mechanism of cross-bridge action.
Starting Page	19
Ending Page	43
Page Count	25
File Format	PDF
ISSN	18806546
Journal	The Journal of Physiological Sciences
Volume Number	67
Issue Number	1
e-ISSN	18806562
Language	English
Publisher	Springer Japan
Publisher Date	2016-07-13
Publisher Place	Tokyo
Access Restriction	Subscribed
Subject Keyword	Muscle heat production Energy balance $^{31}$P NMR MRS Calorimetry Calcium binding proteins Actomyosin Human Physiology Neurosciences Animal Biochemistry Animal Physiology Cell Physiology Neurobiology
Content Type	Text
Resource Type	Article
Subject	Physiology

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