Altered Length-force Characteristics and Epimuscular Myofascial Force Transmission in Spastic Rat Calf Muscles
نویسندگان
چکیده
The aims of the present study were to investigate the effects of spasticity (1) on muscle tendon unit (MTU) length-force characteristics of rat m. gastrocnemius (GAS), m. soleus (SOL) and m. plantaris (PL), and (2) on epimuscular myofascial force transmission between synergistic GAS, SOL and PL, as well as between the calf muscles and antagonistic m. tibialis anterior (TA). The effects of spasticity on rat calf muscles were found to be muscle specific. Length-active force characteristics of spastic GAS and PL muscles were narrower with a reduced maximal active force, whereas maximal active force of spastic SOL was nearly twice as high as from the control SOL. The main difference in length-passive force characteristics were related to the shorter MTU in the spastic calf muscles. The distribution of myofascial force transmission between spastic GAS and SOL seems to be different, but not greater, than in the controls. No sign of antagonistic epimuscular myofascial force transmission between the calf muscles and TA was found in neither spastic nor control rats.
منابع مشابه
Substantial effects of epimuscular myofascial force transmission on muscular mechanics have major implications on spastic muscle and remedial surgery.
The specific aim of this paper is to review the effects of epimuscular myofascial force transmission on muscular mechanics and present some new results on finite element modeling of non-isolated aponeurotomized muscle in order to discuss the dependency of mechanics of spastic muscle, as well as surgery for restoration of function on such force transmission. The etiology of the effects of spasti...
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