SOME MECHANICAL ASPECTS OF AN INTESTINAL SMOOTH MUSCLE.
SOME MECHANICAL ASPECTS OF AN INTESTINAL SMOOTH MUSCLE.
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肠平滑肌的一些机械方面。
DOI：
10.1111/j.1748-1716.1965.tb04150.x
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发表时间：
1965
期刊：
影响因子：
--
通讯作者：
J. Axelsson
中科院分区：
文献类型：
--
作者：
A. Aberg;J. Axelsson
Aberg A. K. G. and J. Axelsson. Some mechanical aspects of an intestinal smooth muscle. Acta physiol. scand. 1965. 64. 15–27. – Atonic pieces of taenia coli muscle were obtained with the aid of adrenaline which abolishes spontaneous spike discharge. As reference length the in vitro length at 37° C, relaxed with adrenaline, was used. Lo (isometric) is arbitrarily defined as the greatest length of an inactive muscle when the force applied to straigthen it does not exceed 50 dynes. At this length the muscles were found to develop maximum tension. Lo (isotonic) is the preloaded length of a relaxed muscle. These conditions gave results which were repeatable with reasonable statistical accuracy, other conditions gave less reproducible results. Force-velocity curves obeying Hill's equation (P+a) (v + b) = (Po + a) b were obtained. Maximum velocity of shortening of an unloaded muscle was extrapolated to 30 per cent of Lo/sec. Velocity of shortening appeared related to the ratio Po: P. Rate of tension development was related to muscle length and resting tension, with a maximum at 130 to 180 per cent of Lo. The highest rate measured was 2,800 dynes/sec. Maximum physical work was performed with constant load of about 30 per cent of Po. Maximum shortening of the muscles under 100 dynes tension varied from 60–80%. The results are discussed in relation to other types of muscle.
