Binder M D, Cameron W E, Stuart D G
Am J Phys Med. 1978 Apr;57(2):57-65.
The neuro-mechanical properties and speed-force relations of 81 cat tibialis posterior motor units have been studied. Statistically significant correlations were found between alpha-axonal conduction velocity (CV) and average twitch tension (log10 TwT; r = 0.459, p less than 0.001), between CV and twitch contraction time (CT; r = -0.395, p less than 0.001) and between CT and log10 TwT (r = -0.277, p less than 0.02). The present correlations for the intermediate-sized tibialis posterior are stronger than those previously reported for large muscles such as soleus, medial gastrocnemius, plantaris and flexor hallucis longus. However, they are considerably weaker than those reported for the much smaller lumbrical muscles of the cat's foot. These findings support the contention that the spinal mechanisms governing an orderly recruitment of motor units according to the size of their muscle units must be more complex for large than for small muscles, at least in the cat hindlimb.
对81个猫胫后肌运动单位的神经机械特性和速度-力量关系进行了研究。发现α轴突传导速度（CV）与平均单收缩张力（log10 TwT；r = 0.459，p < 0.001）、CV与单收缩收缩时间（CT；r = -0.395，p < 0.001）以及CT与log10 TwT（r = -0.277，p < 0.02）之间存在统计学上的显著相关性。目前关于中等大小胫后肌的相关性比先前报道的比目鱼肌、内侧腓肠肌、跖肌和拇长屈肌等大肌肉的相关性更强。然而，它们比猫足部小得多的蚓状肌报道的相关性要弱得多。这些发现支持这样的观点，即至少在猫后肢中，根据肌肉单位大小有序募集运动单位的脊髓机制对于大肌肉而言一定比小肌肉更复杂。
