非洲爪蟾小足部肌肉运动单位的特性
Properties of motor units in a small foot muscle of Xenopus laevis.
作者信息
Ridge R M, Thomson A M
出版信息
J Physiol. 1980 Sep;306:17-27. doi: 10.1113/jphysiol.1980.sp013382.
Abstract
- Extensor digitorum longus IV muscle (EDL IV) of Xenopus laevis was isolated together with its nerve and the 8th and 9th spinal roots. Motor units were functionally isolated and their properties investigated. 2. The motor unit isometric twitch and tetanic tensions, contraction time and axon conduction time and distance were measured. Axon conduction velocity and twitch:tetanus ratio were calculated. 3. The distributions of motor unit properties were continuous and showed no tendency to separate into types. 4. Axon conduction velocity was directly related to unit tetanic tension (expressed as a percentage of whole muscle tetanic tension and to twitch:tetanus ratio and inversely related to contraction time. Unit tetanic tension was directly related to twitch:tetanus ratio and inversely related to contraction time. Contraction time was inversely related to twitch: tetanus ratio. Possible explanations for these relationships are discussed. 5. The units of EDL IV show a greater resistance to fatigue than fast units of other amphibian muscles. There was no separation of units into fatiguable and fatigue resistant types.
摘要
- 非洲爪蟾的第四趾长伸肌（EDL IV）与其神经以及第8和第9脊髓神经根一同被分离出来。对运动单位进行功能分离并研究其特性。2. 测量运动单位的等长收缩抽搐和强直张力、收缩时间、轴突传导时间及距离。计算轴突传导速度和抽搐：强直比率。3. 运动单位特性的分布是连续的，没有分成不同类型的趋势。4. 轴突传导速度与单位强直张力直接相关（以占全肌强直张力的百分比表示），与抽搐：强直比率直接相关，与收缩时间呈负相关。单位强直张力与抽搐：强直比率直接相关，与收缩时间呈负相关。收缩时间与抽搐：强直比率呈负相关。对这些关系的可能解释进行了讨论。5. EDL IV的运动单位比其他两栖类肌肉的快运动单位更抗疲劳。运动单位没有分成易疲劳型和抗疲劳型。
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1
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J Neurophysiol. 1965 Jan;28:71-84. doi: 10.1152/jn.1965.28.1.71.
2
[Relation between the conduction rate of motor nerve fibers and the contraction time of their motor units].运动神经纤维传导速度与其运动单位收缩时间之间的关系
C R Hebd Seances Acad Sci. 1963 Jun 24;256:5625-7.
3
The effect of internal and external potassium concentration on the membrane potential of frog muscle.细胞内外钾离子浓度对蛙肌膜电位的影响。
J Physiol. 1956 Sep 27;133(3):631-58. doi: 10.1113/jphysiol.1956.sp005615.
4
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5
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