NM3: Vestibular questions and answers

NM3: Vestibular questions and answers functions of vestibular system - answer-1. gaze stabilization = VOR 2. postural control = VSR - provides sensory input regarding position and motion of the head - role in controlling position of body's COM - role in stabilizing and orienting head /c respect to gravity - both a sensory and motor system VOR (vestibulo-ocular reflex) - answer-- gaze stabilization during head motion - compensatory eye mvmts - allows clear accurate vision on a target during head mvmt - head mvmt to left causes equal and opposite eye mvmt to the right (1:1 gain) - extraocular muscles are paired /c semicircular canals output for VOR - answer-- ocular motor nuclei - CN 3,4, and 6 VSR (vestibulospinal reflex) - answer-- postural control - compensatory body mvmts - maintains head and body posture - medial and lateral vestibulospinal tracts - to motor neuron in the cervical and lumbar spinal cord - Cspine muscles and extensors output for VSR - answer-- medial and lateral vestibulospinal tracts 1. medial = cervi