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Related to Vestibulo-ocular reflex: Oculocephalic reflex, doll's eye maneuver, Doll's eye reflex
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During slow passive head turning (0,5 Hz) two systems enable sharp target at retina: smooth pursuit and vestibulo-ocular reflex. As both systems are affected in patient with CANVAS, VVOR test is positive: saccadic eye movements compensate for non functioning smooth pursuit and VOR [2].
Repeated measures of VOR gain and GA values for the affected PSSC in the BPPV group (n=24) Before After maneuver 3rd day maneuver VOR gain 0.92[+ or -]0.18 1[+ or -]0.13 0.98[+ or -]0.14 GA 3[+ or -]1.79 2.77[+ or -]1.86 2.81[+ or -]1.9 7th day 1th month p VOR gain 1.01[+ or -]0.17 0.92[+ or -]0.21 0.101 GA 3[+ or -]2.01 2.81[+ or -]1.95 0.498 GA: gain asymmetry; VOR: vestibulo-ocular reflex; PSSC: posterior semicircular canal; BPPV: benign paroxysmal positional vertigo Table 3.
Halmagyi, "Head impulse test in unilateral vestibular loss: vestibulo-ocular reflex and catch-up saccades," Neurology, vol.
Comparison of head thrust test with head autorotation test reveals that the vestibulo-ocular reflex is enhanced during voluntary head movements.
Shelhamer, "Incremental angular vestibulo-ocular reflex adaptation to active head rotation," Experimental Brain Research, vol.
In their mouse model, disabling the vestibulo-ocular reflex increases the optokinetic reflex.
Head Thrust Test (the Head Impulse Test of Halmagyi and Curthoys) allows the examination of the horizontal vestibulo-ocular reflex (VOR) which is very useful for detecting imbalance in a labyrinth function although central compensation has occurred.
(1995) Learning and memory in the vestibulo-ocular reflex. Annu.
Lisberger, "Plasticity in the vestibulo-ocular reflex: a new hypothesis, " Annual Review of Neuroscience, vol.
Characterizing high-velocity angular vestibulo-ocular reflex function in service members post-blast exposure.
This process, known as the vestibulo-ocular reflex, is affected by the directions sensed by the canals and the pull directions of the eye muscles.
These are assessed by performing a horizontal head impulse test (a test of vestibulo-ocular reflex function), a test for direction-changing nystagmus, and an alternating cover test to test for skew deviation.