NSCI 201 Lecture Notes - Lecture 6: Bony Labyrinth, Semicircular Canals, Vestibular System
10 Apr 2019
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Document Summary
The vestibular system, located in the ears, is one of the main systems for balance and movement detection in the human body: peripheral vestibular system. And gives important information for motor responses that stabilize: gaze, head, posture. Consists of the vestibular labyrinth (continuous with cochlea) Detects head movements via the effects of gravity on the fluid and the membranes of the. Structure: 3 interlinked semicircular canals oriented along x, y and z axes. Horizontal semicircular canal: otolith ear rock organs. Uses the same sensory cells hair cells" as the cochlea and same endolymph and perilymph: ampullae at the bases of the semicircular canals, canal reuniens unites with the cochlea, present in: Transduce small displacements into receptor potentials the same way as the hair. Ampullae: similar to cochlear hair cells: cells in the cochlea do, different to cochlear hair cells: These ones do not lose their kinocilia. All hair cells are polarized in the same directions.
