[Dependence of skeletal muscle fatigue on the membrane polarization of the different types of muscle fibers in tourniquet shock].

Fatigue, polarization level and excitability of striated muscle fibers from ischemia zone were studied on experimental rats under the tourniquet shock. It was established that violation-mediated contraction and fatigue of skeletal muscle was associated with a decrease in a number of muscle fibers with high level of MPP. The article discussed the mechanisms of fatigue and depolarization of muscle fibres in tourniquet shock.

[Electrical properties of membranes of motor neurons innervating the masseter muscle in rats].

Membrane resting and action potentials evoked by antidromic and direct stimulation were studied in neurons of the rat trigeminal motor nuclei. It is shown that in the given motor nuclei there are cell populations both with low and high membrane potentials. Motoneurons with high resting potentials were characterized by shorter latent period of antidromic activation, longer duration of spike and after depolarization and lower input resistance.