Hodgson J A
J Physiol. 1983 Apr;337:553-62. doi: 10.1113/jphysiol.1983.sp014641.
Force and electromyogram (e.m.g.) data were recorded from medial gastrocnemius and soleus muscles of conscious cats using chronically implanted devices. A digital computer was used to take simultaneous samples of the data from both muscles and construct two-dimensional frequency distributions relating the activities in the two muscles. The results show that posture is the only activity where soleus may be active without corresponding activity in the medial gastrocnemius muscle. In locomotion the ratio between soleus and medial gastrocnemius muscle activities changed with treadmill speed, although peak soleus force remained constant at approximately 80% of the isometric tetanic tension measured in terminal experiments. A hypothesis is put forward, associating these findings with the activities of slow and fast motor units and emphasizing the influence of neural activity in the determination of motor unit recruitment.
使用长期植入装置，从清醒猫的腓肠肌内侧头和比目鱼肌记录力和肌电图（e.m.g.）数据。一台数字计算机用于同时采集来自两块肌肉的数据样本，并构建与两块肌肉活动相关的二维频率分布。结果表明，姿势是比目鱼肌可能活跃而腓肠肌内侧头没有相应活动的唯一活动。在运动过程中，比目鱼肌和腓肠肌内侧头的肌肉活动比率随跑步机速度而变化，尽管比目鱼肌的峰值力在终末实验中测量的等长强直张力的约80%处保持恒定。提出了一个假设，将这些发现与慢运动单位和快运动单位的活动联系起来，并强调神经活动在运动单位募集决定中的影响。
