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June 1965

Eye Movements Produced by the Superior Oblique Muscle

Author Affiliations

New York
From the Department of Neurology, the Mount Sinai Hospital.

Arch Ophthalmol. 1965;73(6):851-862. doi:10.1001/archopht.1965.00970030853018

Introduction  The action of the superior oblique muscle has been inferred from anatomical relationships, from oculomotor defects produced by III or IV nerve damage, and from ophthalmotropes. With few exceptions1,2 there is general agreement that when the eye is adducted the superior oblique muscle acts to depress the eyeball and when the eye is abducted, it acts to intort and abduct it.3-8 Nevertheless there have been few experimental studies of superior oblique muscle action in the intact mammal or in humans.1-3,9 This paper presents the results of such a study. It shows that eye movements induced by isolated contraction of the superior oblique muscle fit closely with those predicted from the anatomy of the globe and orbit.

Methods and Materials  Seven cats and one monkey were studied. In each case the trochlear nucleus and/or trochlear nerve roots were electrically stimulated to produce contraction of the contralateral superior

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