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Definition
| eye has not rotated along any major axis |
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Definition
| movement away from the midline |
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Definition
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Definition
| purely vertical or horizontal movement |
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Definition
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Definition
| displace visual axis of both eyes in same direction |
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Definition
| electrodes placed on eye detect movements |
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Term
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Definition
| movment of eyes towards each other or away from each other |
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Term
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Definition
| contact lens bearing a small mirror - light beam projected onto eye, and eye movements make the angle of indcidence and reflection change (light lever) |
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Term
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Definition
| coil of fine wire attatched to eye, patient's head in a field coil which is an alternating magnetic field that makes a current run |
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Definition
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Definition
| depresses, intorts, and adducts. passes through trochlea |
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Term
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Definition
| extorts, elevates, and abducts |
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Term
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Definition
| lateral rectus. also called VIth nerve |
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Term
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Definition
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Term
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Definition
| superior, inferior, medial recti and inferior oblique (III) |
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Term
| medial longitudinal fasciculus |
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Definition
| large myelinated tract in the brainstem. provvides low-level coordinating cicuitry. |
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Term
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Definition
| displace image from one part of the retina to another |
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Definition
| prevent an image from moving on the retina |
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Term
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Definition
| eyes track a target in a smooth, conjugate, deviation |
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Term
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Definition
| automatically produces slow eye movement to counteract the motion of the retinal image due to head movement |
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Term
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Definition
| angular eye velocity/angular head velocity |
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Term
| optokinetic eye movements |
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Definition
| usually occur in response to movements of the head that move entire visual scene when eye is open. stabilizes image of entire background |
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Term
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Definition
| jerking movement of eyes, slow then quick |
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Term
| vestibular and optokinetic nystagmus |
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Definition
| nystagmus that occurs because of the VOR and the optokinetic eye movements |
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Term
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Definition
| continuous small movements of the eye |
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Term
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Definition
| the movement of an image across the retina expressed as a velocity |
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Definition
| static displacement of the image from the fovea |
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Definition
| = eye velocity + retinal slip |
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Term
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Definition
| cerebellar reigon most involved in smooth persuit |
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Definition
| separation of an image from the fovea |
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Definition
| = target position relative to head - current eye position |
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Term
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Definition
| produce intense burst of action potentials during a saccade |
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Term
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Definition
| paramedian pontine reticular formation |
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Definition
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Term
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Definition
| broadmann's area 8 - activation of them causes conjugate saccades to the oppposite side. cells in this area discharge prior to saccades to visual targets, but not before "spontaneous" saccades |
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