[Mechanism of the contractile function of masseter muscles in experimental rat botulism].
Injection of the sublethal dose of botulinic toxin into one of the masseter muscles produces muscle weakness and impaired occlusion. The membrane polarization rate and action potential decrease primarily in high polarized muscle fibers of the injured muscle. Meanwhile the function of low polarized fibers does not undergo any significant changes.
D000818:Animals; D001906:Botulism / Q000503:physiopathology*; D004195:Disease Models, Animal; D008406:Masseter Muscle / Q000503:physiopathology*; D008410:Masticatory Muscles / Q000503:physiopathology*; D009119:Muscle Contraction; D051381:Rats
K mekhanizmu narusheniĭ sokratitle'noĭ funktsii zhevatel'noĭ muskulatyrl v eksperimental'nom botulizme y krys.