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Ocular Stabilization During Oscillatory Head MovementsVestibular System Dysfunction and the Relation Between Head and Eye Velocities
Adam Atkin, MS;
Morris B. Bender, MD
Arch Neurol. 1968;19(6):559-566.
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| Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings. |
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EVEN during steady visual fixation of some object of interest, the eye makes continual small movements—called "physiological nystagmus"—which seem to aid in the maintenance of visual contrast.1 The fluctuations in image position which are produced by these eye movements are on the order of seconds or minutes of arc; however, visual acuity declines markedly whenever extensive image movements occur,2 and vertebrates show a variety of mechanisms which control postural and ocular stability in a manner that tends to minimize such movements during intervals of visual fixation.3,4
The vestibular apparatus plays an important role in this ocular stabilization.3,5 The semicircular canals—which are primarily affected by rotational movements of the head—have commonly been viewed as acceleration sensors,6-8 and under steady-state conditions the position of the cupula does depend directly upon angular acceleration.9 However, head rotations are generally brief, and therefore analysis in terms of
. . . [Full Text PDF of this Article]
Author Affiliations
New York
From the Department of Neurology, Mt. Sinai Hospital and Mt. Sinai School of Medicine of the City University of New York.
Footnotes
Submitted for publication Jan 20, 1968; accepted June 18.
Read in part before the 19th Annual Meeting of the American Physiological Society, Howard University College of Medicine, Washington, DC, August 1967.
Reprint requests to Department of Neurology, The Mt. Sinai Hospital, New York 10029 (Mr. Atkin).
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