人类腓肠肌内侧头的运动单位组织

Garnett R A, O'Donovan M J, Stephens J A, Taylor A

J Physiol. 1979 Feb;287:33-43. doi: 10.1113/jphysiol.1979.sp012643.

The properties of fifty-seven motor units in human medial gastrocnemius have been studied using controlled intramuscular microstimulation, glycogen depletion and muscle biopsy. 2. Motor units could be divided into three classes on the basis of their mechanical properties. Type S units were slow, small and fatigue resistant. Type FR units were fast, intermediate in size, and fatigue resistant. Type FF units were fast, large and fatigable. 3. Glycogen depletion of a number of type S and FF units revealed them to be composed of type 1 and type 2b muscle fibres respectively. 4. The results suggest that during slowly increasing voluntary contractions where units are recruited in order of size, type 1 and 2a muscle fibres would be employed at low force levels followed by type 2b muscle fibres in stronger contractions.

利用可控的肌内微刺激、糖原耗竭和肌肉活检技术，对人类腓肠肌内侧57个运动单位的特性进行了研究。2. 根据运动单位的力学特性可将其分为三类。S型运动单位速度慢、体积小且抗疲劳。FR型运动单位速度快、体积中等且抗疲劳。FF型运动单位速度快、体积大且易疲劳。3. 对一些S型和FF型运动单位的糖原耗竭研究表明，它们分别由1型和2b型肌纤维组成。4. 结果表明，在缓慢增加的自主收缩过程中，运动单位按大小顺序被募集，在低力量水平时会动用1型和2a型肌纤维，在更强收缩时则会动用2b型肌纤维。

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核心技术专利：CN118964589B侵权必究

Garnett R A, O'Donovan M J, Stephens J A, Taylor A

J Physiol. 1979 Feb;287:33-43. doi: 10.1113/jphysiol.1979.sp012643.

The properties of fifty-seven motor units in human medial gastrocnemius have been studied using controlled intramuscular microstimulation, glycogen depletion and muscle biopsy. 2. Motor units could be divided into three classes on the basis of their mechanical properties. Type S units were slow, small and fatigue resistant. Type FR units were fast, intermediate in size, and fatigue resistant. Type FF units were fast, large and fatigable. 3. Glycogen depletion of a number of type S and FF units revealed them to be composed of type 1 and type 2b muscle fibres respectively. 4. The results suggest that during slowly increasing voluntary contractions where units are recruited in order of size, type 1 and 2a muscle fibres would be employed at low force levels followed by type 2b muscle fibres in stronger contractions.

利用可控的肌内微刺激、糖原耗竭和肌肉活检技术，对人类腓肠肌内侧57个运动单位的特性进行了研究。2. 根据运动单位的力学特性可将其分为三类。S型运动单位速度慢、体积小且抗疲劳。FR型运动单位速度快、体积中等且抗疲劳。FF型运动单位速度快、体积大且易疲劳。3. 对一些S型和FF型运动单位的糖原耗竭研究表明，它们分别由1型和2b型肌纤维组成。4. 结果表明，在缓慢增加的自主收缩过程中，运动单位按大小顺序被募集，在低力量水平时会动用1型和2a型肌纤维，在更强收缩时则会动用2b型肌纤维。