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Electromyographic study of the sternocleidomastoid muscle in head movements
D Costa1, M Vitti, D De Oliveira Tosello
1Department of Physical and Occupational Therapy, Centro de Ciências Biológicas e da Saúde da Universidade Federal de São Carlos.
Electromyography and Clinical Neurophysiology
|November 1, 1990
Abstract:
The function of the sternocleidomastoid muscle in head movements of 30 young individuals (19-28 years old, both sexes) was studied electromyographically using a TECA TE-4 electromyograph and Beckman surface electrodes. Action potentials were found in the following head movements: free heterolateral rotation; free homolateral inclination; free and counter-resistance protraction; free and counter-resistance flexion and free extension. These movements were performed with the subjects seated and in supine position.