Michael C. Schubert, PT, PhD, Americo A. Migliaccio, PhD, Richard A

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Presentation transcript:

Mechanism of Dynamic Visual Acuity Recovery With Vestibular Rehabilitation Michael C. Schubert, PT, PhD, Americo A. Migliaccio, PhD, Richard A. Clendaniel, PT, PhD, Amir Allak, BS, John P. Carey, MD Archives of Physical Medicine and Rehabilitation Volume 89, Issue 3, Pages 500-507 (March 2008) DOI: 10.1016/j.apmr.2007.11.010 Copyright © 2008 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

Fig 1 aVOR gain during passive horizontal head thrust testing in a healthy control subject and subject with left UVH. Left and right refer to direction of passive horizontal head thrust rotation. (A) Data from both eyes in a subject with normal VOR function. (B) Data from left eye only in a subject with left UVH. Head and/or eye velocity plots have been inverted for ease of comparison. Note that the quick phases in the bottom left panel are in the same direction as the slow-phase eye velocity, illustrating the compensatory saccades. Archives of Physical Medicine and Rehabilitation 2008 89, 500-507DOI: (10.1016/j.apmr.2007.11.010) Copyright © 2008 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

Fig 2 (A) Patients with UVH and partial recovery; (B) patients with UVHc; and (C) patients with BVH. Improvement of aVOR gain during DVA testing. Eye velocity plots have been inverted for ease of comparison. Eye velocities are from left eye only. For head rotation in the contralesional direction, compensatory saccades occur with much less frequency, suggesting that compensatory saccades recruitment is dependent on subjects’ intent for gaze stability. NOTE. The compensatory saccades (CS) ratio is the number of compensatory saccades/total number of head rotations. Archives of Physical Medicine and Rehabilitation 2008 89, 500-507DOI: (10.1016/j.apmr.2007.11.010) Copyright © 2008 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions