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EYE MOVEMENTS

EYE MOVEMENTS. NBIO 401 Monday, November 22, 2010 Ric Robinson. Objectives: Be able to describe the neural pathway of the VOR, i.e., the pathway through which vestibular information contracts eye muscles. (labyrinth - vestibular nuclei -oculomotor neurons.)

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EYE MOVEMENTS

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  1. EYE MOVEMENTS NBIO 401 Monday, November 22, 2010 Ric Robinson

  2. Objectives: • Be able to describe the neural pathway of the VOR, i.e., the pathway through • which vestibular information contracts eye muscles. (labyrinth - vestibular nuclei -oculomotor neurons.) • Be able to explain why the VOR is important to clear vision. • Be able to explain how putting cool or warm water into the ear elicits eye movements. • Be able to explain how optokinetic nystagmus aids the VOR. • Be able to describe the characteristics of the 6 types of eye movements we make (counting fixation as an “eye movement”). • Be able to characterize the changes in accommodation that always accompany vergence and what purpose combined vergence and accommodation serve. • Be able to describe the neural pathways underlying each of the 6 types of eye movements. • Be able to characterize the map of visual and motor space on the surface of the superior colliculus (SC). • Be able to describe the spatial to temporal transformation in saccade processing. • - Be able to explain the reciprocal relationship between the activity in the substantia nigra pars reticulata and the SC. What is the caudate doing during a saccade?

  3. Opsoclonus - young baby

  4. Caloric Testing

  5. Smooth Pursuit Pathways

  6. Saccade Example

  7. Saccade Pathways

  8. Pre Motor Network for Horizontal Saccades Pre Motor Network for Vertical Saccades

  9. Abducens Nucleus

  10. SNr and Superior Colliculus Activity During a Saccade

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