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KMID : 0358619920260020151
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Korean Journal of Physiology
1992 Volume.26 No. 2 p.151 ~ p.157
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Reflex Action of the Semicircular Canals on Cervical Extensor and Flexor Muscles in Cats
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Kim Jeh-Hyub
Park Jong-Seong
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Abstract
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In urethane anesthetized cats, each vestibular semicircular canal nerve was electrically stimulated, and reflex responses of the cervical extensor and flexor (the splenius capitis and sternomastoid muscles) were recorded by means of electromyography. Stimulation of a unilateral (anterior, horizontal or posterior) canal nerve elicited excitation of the contralateral cervical muscles and inhibition of the ipsilateral ones; during the canal nerve stimulation, the two muscles in one side of the neck revealed synergistic responses. Based on these experimental results, we formulated a diagram showing the functional connections between the vestibular semicircular canals and the cervical muscles in the vestibulocollic reflex.
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KEYWORD
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Vestibular semicircular canal, Cervical muscle, Vestibulocollic reflex, Axial muscle
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