Correlation of potential and fiber type in extraocular muscle.

Abstract

EMG potentials were recorded simultaneously with spontaneous intracellular multifocus slow potentials in the rabbit superior rectus under general anesthesia. Those EMG potentials which were synchronous with such intracellular potentials, are essentially monophasic and at least 4 msec in duration, clearly different from spike potentials. It was verified, that the fibers which produce such spontaneous intracellular multifocus slow potentials are indeed multiply innervated. The study of such slow potential activity in human extraocular muscles may be profitable.