High-Speed Cinematography of Muscle Contraction

Science  13 Jul 1962:
Vol. 137, Issue 3524, pp. 132
DOI: 10.1126/science.137.3524.132


Motion pictures of the "twitch" of an excised frog gastrocnemius muscle taken at rates of 6000 frames per second provide a means of very accurately timing the phases. The extreme "slow motion" reveals surface phenomena not observable by other techniques. Evidence of "active relaxation" is suggested by results of frame-by-frame analysis.