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Updated: Sep 3, 2026

Functional Isolation of Single Motor Units of Rat Medial Gastrocnemius Muscle
Published on: December 26, 2020
Impaired regulation of the firing pattern of single motor units
Abstract:
The firing pattern of single motor units from the anterior tibial muscle was studied during constant isometric contraction. Recordings were made with bipolar, fine-wire electrodes from 4 normal subjects and from 10 patients with spasticity. A microcomputer was used to classify the motor unit potentials automatically and to measure the interspike intervals. The patients had reduced firing frequencies and reduced variability between neighbor intervals. Seven patients with spasticity due to supraspinal lesions had positive correlation between neighbor intervals.
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