CEREBELLUM & EYE MOVEMENTS

INDEX

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I ANATOMY                

 

II PHYSIOLOGY OF EYE MOVEMENTS  

III CLINICAL EXAMINATION

IV FIXATION INSTABILITY   

V SUPRANUCLEAR to NUCLEAR  

 VI VESTIBULAR     SYSTEM 

VIII VISUAL FIELDS, PUPIL & THE EYE

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The cerebellum plays a pivotal role in the control of eye movements. Its core function is to optimize ocular motor performance so that images of objects of interest are promptly brought to the fovea – where visual acuity is best – and kept quietly there, so the brain has time to analyze and interpret the visual scene.
The cerebellum has both immediate, on-line functions to make each individual movement accurate, and long-term, adaptive functions to keep ocular motor responses correctly calibrated to the stimuli that drive them1.

Purkinje cells of the cerebellar cortex primarily project to and inhibit cells within the underlying deep cerebellar nuclei.
Purkinje cells in the vestibulocerebellum ((flocculus,paraflocculus,nodulus, and uvula)) project primarily to the ipsilateral brain stem nuclei


The vestibulocerebellum also projects to the vestibular nuclei (some of which can be thought of as “displaced” deep cerebellar nuclei).
The fastigial nuclei decussate within the cerebellum and terminate in the contralateral vestibular or premotor brainstem nuclei while 1.

 

 

 

 

 

References

  1. Kheradmand A, Zee DS. Cerebellum and ocular motor control. Front Neurol. 2011;2:53.