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KMID : 0376219860230020239
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Chonnam Medical Journal
1986 Volume.23 No. 2 p.239 ~ p.245
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Studies on the Oblique Muscle Function in Cats
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Abstract
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In anesthetized cats the ocular oblique muscles were contracted by either direct electrical stimulation or reflex action which was elicited by vestibular canal nerve stimulation. The directions of ocular rotatory responses were observed by means of electrooculographic and electronystagmographic recordings.
In addition to their respective cycloduction, contraction of superior oblique muscle caused elevation of the eye and that of the inferior oblique produced depression in this animal.
The ocular rotatory responses caused by contraction of ocular oblique muscles in the present experiment were compared to the similar observations of previous investigators which were made in the animal with monocular vision. In the animals with monocular and binocular vision, the directions of the ocular rotations caused by the superior oblique muscles were contradictory to each other. Such difference in the rotational direction was ascribed to the marked variations of the origo-insertio relationship of the superior oblique muscle, as well as to the trochleal position in the orbits of these animals.
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