ACB 334 Lecture Notes - Lecture 19: Lateral Vestibulospinal Tract, Intermediate Nerve, Vestibulospinal Tract

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

Document Summary

Regulation of posture most part it is unconscious. *as you get older, the vesti(cid:271)ula(cid:396) syste(cid:373) does(cid:374)"t (cid:449)o(cid:396)k (cid:395)uite as (cid:449)ell. Overtime, you get ossification in your vestibular system = less input. 2)describe the location of the vestibular apparatus and its primary anatomical components. The vestibular apparatus is located in the petrous portion of the temporal bone (inner ear) Superior to (above) and posterior to (behind) the cochlear apparatus. Dynamic labyrinth = located within the membranous portion of the semicircular ducts: movement of head (angular acceleration) Static labyrinth = located within the membranous portion of the vestibule (utricle and saccule: position/tilt of head (linear acceleration) Located within the membranous portion of the semicircular ducts the vestibule (utricle and saccule) Contains of the sensory hair cells of the. Ridge of sensory hair cells utricle (wall: up/down) and saccule (floor) Gelatinous cupula = runs the length of the ampula: displaces endolymph (in. Gravity moves the otoliths moves gelatinous layer moves hair cells.