14VestibularSystem

14VestibularSystem - Vestibular System Functions of the...

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Unformatted text preview: Vestibular System Functions of the Vestibular System Perceive self-motion, head position and spatial orientation relative to gravity Helps stabilize gaze, head and posture Vestibular Labyrinth Bony labyrinth houses membranous labyrinth contains perilymph similar in composition to CSF Membranous Labyrinth contains endolymph comprises otolith organs and semicircular canals Otolith Organs Determine linear acceleration and static position Housed within vestibule of bony labyrinth Utricle Sacculus Vestibules contain hair cells in spots referred to as maculae Semicircular Canals Determine rotational acceleration Hair cells in ampullar cristae The labyrinth and its innervation Vestibular Hair Cells Structure like auditory hair cells, except retain kinocilium This makes another sensory receptor thats ciliated. Orientation in ampullae, hair cells are uniformly oriented in utricle and sacculus, maculae are divided by striola (see figure) Figure 14.2 The morphological polarization of vestibular hair cells and polarization maps of the vestibular organs (Part 1) Figure 14.2 The morphological polarization of vestibular hair cells and polarization maps of the vestibular organs (Part 2) Figure 14.2 Figure 14....
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This note was uploaded on 11/09/2011 for the course CHEM 2341 taught by Professor Staff during the Fall '11 term at Texas State.

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14VestibularSystem - Vestibular System Functions of the...

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