KNES462_d7 copy

Semicircular ducts serve predominantly to control eye

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: embedded in gelatinous mass are deflected by the inertia (relative flow) of endolymph in the duct. • Semicircular ducts serve predominantly to control eye movements, and to coordinate head & eye movements. 34 Bi-directionality of cupula cells • Bi-directional responses from the hair cells: – Recording from the same set of hair cells shows increase of neural firing rate during acceleration, and decrease during deceleration. 35 3 KNES 462 Vestibular Reflexes neck reflexes-vestibulo colic refrlexes---they counter act head reflexes. Vestibular reflexes align head and body with respect to gravity. • act on the neck (‘vestibulocollic’) and on the limbs (‘vestibulospinal’); • are evoked by changes in head position sensory input by otolith organs. 36 KNES 462 ©FK ‘08 Vestibular Projections 8th vestibulo nerv---innnervates the vestibular nucleus • Vestibular system inputs to the vestibular nuclei in the medulla. • From there, pathways descend to the spinal cord, either laterl--distal pathways run ipsilateralerallt – To proxima...
View Full Document

This document was uploaded on 03/19/2014 for the course KNES 462 at Maryland.

Ask a homework question - tutors are online