Term
| This is the central conduit to motor nuclei for coordinated and synchronized eye movement. Involved in all classes of eye movements. |
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Definition
| Medial longitudinal fasiculus |
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Term
| This generates quick eye movements for orienting to visual or auditory stimulus. Associated with saccades. |
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Definition
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Term
| This has a major role in generation of VOR and OPK nystagmus. |
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Definition
| Superior and lateral vestibular nuclei |
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Term
| This fixes images with head stable and environment moving. Associated with optokinetic movements. |
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Definition
| Lateral vestibular nucleus |
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Term
| This generates ballistic eye movement. This is also associated with saccades. |
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Definition
| Pontine excitatory burst neurons |
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Term
| This stabilizes images during head movement. Associated with VOR. |
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Definition
| Medial vestibular nucleus. |
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Term
| This holds target on fovea. Associated with MVN horizontal gaze-holding. |
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Definition
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Term
| Ability to move the eyes in a rapid singlel movement to fixate on a target of interest |
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Definition
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Term
| Ability to track the movement of a target of interest while maintaining the image on the fovea with smooth continuous eye movements |
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Definition
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Term
| Development of reflexive eye movements in the form of jerk nystagmus during visualization of moving objects that fill 80% to 90% or greater of the visual field of view. |
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Definition
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Term
| Ability to maintain gaze stable without the generation of other eye movements while looking straight ahead, left, right, up, and down |
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Definition
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Term
Alexander's law:
Nystagmus increases in intensity as the gaze is shifted toward the direction of the ___ component |
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Definition
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Term
| Denotes movement of the eyes without a cognitive, visual, or vestibular stimulus |
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Definition
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Term
5 clinical signs of peripheral nystagmus:
-Nystagmus with fixation present or absent should be ___ fixed in nature and must have a ___ component
-Must follow ___ Law
-___ with fixation removed (primary determiner of peripheral source)
-Nystagmus ___ with head shake test
-A tracing of the nystagmus of the slow component should be ___ |
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Definition
| direction; horizontal; Alexander’s; Enhanced; enhanced; linear (straight line) |
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Term
5 clinical signs of a central nystagmus:
-Could be pure ___ or ___, or direction ___
-Rarely in ___ gaze. Pure ___ or pure ___ can persist in primary gaze.
-___ with fixation
-___ nystagmus post head-shake test
-Horizontal nystagmus trace will show a slow component that is ___ |
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Definition
| up or down; changing (fast component in direction of gaze); primary; vertical; torsional; Enhanced; Vertical; nonlinear |
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