Motor units in cat soleus muscle: physiological, histochemical and morphological characteristics
نویسندگان
چکیده
منابع مشابه
Summation of forces from multiple motor units in the cat soleus muscle.
Nearly all muscle models and most motor control concepts assume that forces from individual muscle fibers and motor units sum in an additive manner once effects of in-series tendon compliance are taken into account. Due to the numerous mechanical linkages between individual fibers, though, it is unclear whether this assumption is warranted. This work examined motor unit force summation over a w...
متن کاملProperties of Motor Units in a Homogeneous Red Muscle (soleus) of the Cat.
THE INFORMATION WHICH IS AVAILABLE on the properties of motor units in skeletal muscles is chiefly of an indirect nature, having been inferred from observations on whole muscles. Although a muscle is no more than an assembly of motor units, the collective properties of the whole do not convey much information about its parts. The innervation ratios, contraction times, and tensions of motor unit...
متن کاملMuscle architecture and force-velocity characteristics of cat soleus and medial gastrocnemius: implications for motor control.
1. Isometric and isotonic contractile parameters of the soleus (SOL) and medial gastrocnemius (MG) muscles of seven adult cats were studied. In addition, architectural characteristics of six contralateral pairs of these ankle extensors were determined. 2. The in situ peak isometric tetanic tension developed by the MG at the Achilles tendon is nearly 5 times (9,846 vs 2,125 g) that of the SOL mu...
متن کاملDevelopment of homogeneous fast and slow motor units in the neonatal mouse soleus muscle.
We studied the fiber type composition and contractile properties of mouse soleus motor units at 2 days, 5 days and 2 weeks of age. We used Lucifer Yellow injection to mark muscle fibers belonging to the same motor unit in the two youngest age groups, and the traditional method of glycogen depletion in the oldest. The age groups were chosen because 2 days is at the end of muscle fiber production...
متن کاملSynchronization of motor units in human soleus muscle during standing postural tasks.
During standing posture, the soleus muscles acts to control sway in the anteroposterior (AP) direction. The soleus muscles bilaterally share a common function during standing tasks. We sought to determine whether common descending inputs, as evidenced by the synchronization of bilateral motor unit pairs, were employed as a strategy to control this common function. Single motor units were record...
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ژورنال
عنوان ژورنال: The Journal of Physiology
سال: 1974
ISSN: 0022-3751
DOI: 10.1113/jphysiol.1974.sp010540