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To the Editor:
—My abstract of the report by Carpenter et al, on "Disturbances of Conjugate Horizontal Eye Movements in the Monkey" that appeared in the July issue of the Archives stated a conclusion at variance with those of the authors. The syndrome of paralysis of ipsilateral horizontal conjugate eye movements was indeed produced in monkeys by lesions of the abducens nucleus, but the authors concluded that the anatomical basis was a combination of the destruction of cells in the abducens nucleus and interruption of secondary vestibular fibers passing through the nucleus destined for the contralateral medial longitudinal fasciculus. It was not the author's conclusion that a pontine horizontal gaze center and the abducens nucleus shared a common locus.
Lessell S. DISTURBANCES OF CONJUGATE HORIZONTAL EYE MOVEMENTS. Arch Ophthalmol. 1963;70(4):588. doi:10.1001/archopht.1963.00960050590032