Electrophysiological characteristics of the external eye muscles of frogs]

With the aid of a microelectrophysiological method data were obtained on the difference of the fibers of the inferior rectus muscle of a frog by the type of electrical activity. The greater part of the fibers displayed a continuous tonic activity in the form of polymorphous postsynaptic potentials. Individual fibers responded by a series of action potentials to depolarization created by the introduction of a microelectrode; such reaction was characteristic of the skeletal transitional fibers. The rest of the fibers were inactive, at least some of them with a high membrane potential could be referred to the phasic system.