Non-human primates exhibit disconjugate ocular counterroll to head roll tilts
نویسندگان
چکیده
منابع مشابه
Non-human primates exhibit disconjugate ocular counterroll to head roll tilts
To investigate the effect of head roll tilt on the binocular coordination of ocular counterroll in non-human primates, we measured binocular ocular counterroll in two rhesus monkeys fixating a straight ahead target, while adopting different head roll tilt positions. We used two infrared cameras to take snapshots of the left and the right eye in order to measure the resulting ocular counterroll ...
متن کاملConvergence reduces ocular counterroll (OCR) during static roll-tilt
When humans are roll-tilted around the naso-occipital axis, both eyes roll or tort in the opposite direction to roll-tilt, a phenomenon known as ocular counterroll (OCR). While the magnitude of OCR is primarily determined by vestibular, somatosensory, and proprioceptive input, direction of gaze also plays a major role. The aim of this study was to measure the interaction between some of these f...
متن کاملStability of ocular counterrolling and Listing's plane during static roll-tilts.
PURPOSE To investigate whether habituation occurs in ocular counterrolling (OCR), how stable shifted Listing's plane is, and what effects visual stimulation and alertness exert on the OCR and on Listing's plane. METHODS Two monkeys (Macaca fuscata) were engaged in this experiment. A dual scleral search coil method was used for recording three-dimensional eye movements. Spontaneous eye movemen...
متن کاملModulation of saccade curvature by ocular counterroll.
PURPOSE On close inspection, it can be seen that most saccadic trajectories are not straight but curve slightly; in other words, they are not single-axis ocular rotations. The authors asked whether saccade curvatures are systematically influenced by static ocular counterroll (OCR). METHODS OCR was elicited by static whole-body roll position. Eight healthy human subjects performed horizontal a...
متن کاملStatic ocular counterroll reflex in skew deviation.
OBJECTIVE The static ocular counterroll (OCR) reflex generates partially compensatory torsional eye movements during head roll. It is mediated by the utricle in the inner ear. Skew deviation is a vertical strabismus thought to be caused by imbalance in the utriculo-ocular pathway. We hypothesized that if skew deviation is indeed caused by damage to this reflex pathway, patients with skew deviat...
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ژورنال
عنوان ژورنال: Vision Research
سال: 2011
ISSN: 0042-6989
DOI: 10.1016/j.visres.2011.07.013