ACB 334 Lecture Notes - Lecture 17: Medial Vestibular Nucleus, Inferior Cerebellar Peduncle, Superior Cerebellar Peduncle

• School: U of S
• Department: Anatomy and Cell Biology
• Course: ACB 334
• Professor: Jen Chlan

Document Summary

Stimulus picked up by left horizontal semicircular canal. Cerebellum relay back info into vestibular nucleui and goes to inferior cerebellar peduncle. Go to medial vestibular nucleus to coordinate movement of the eyes. Keeps the line of sight stable in space while the head is moving. The ability to follow a moving visual target of interest by generating voluntary smooth eye movements. *fovea = only has cones and has 1 layer (smallest amount of distortion) Motor nuclei of cn 3 and 6 (through medial longitudinal fasciculus) Rapid eye movements that fix the eye on a specific target of interest in visual space. Extrageniculate pathway = doesn"t synapse on lgn; synapses on lgn. Ocular dysmetria saccades overshoot/undershoot their target. Nystagmus rhythmic regular oscillation of the eyes; alternating phases of a slow drift in one di(cid:396)ection (cid:449)/ a co(cid:396)(cid:396)ecti(cid:448)e (cid:395)uick (cid:862)je(cid:396)k(cid:863) in the opposite direction. Corticopontocerebellar pathway = info from cortex to stay still and to inform if things went wrong.