NSCI 1051 Lecture Notes - Vestibulocochlear Nerve, Planum Temporale, Vestibular Duct
16 Apr 2014
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Document Summary
Planum temporale- non primary auditory cortex; activated when listening to varied frequencies and is involved in the acoustics of speech. Reissner"s membrane- separates the scala vestibuli from the scala media (top and middle) Bony labyrinth: interconnected chambers containing hair cells, detects gravity, tilts and rotations of the head transmits this mechanical energy to hair cells. Stereocilia- about 100 of these extend from the top of each hair cells-involved in movement or transducing sensory information; found on receptors in the auditory and vestibular system. Vestibular-ocular reflex (vor)- important function of the central vestibular system which keeps your eyes pointed in a particular direction; reflex triggered by vestibular input rather than visual input; effectiveness depends on connections with the semicircular canals. Semicircular canals- sensitive to head rotation and sense angular acceleration which is generated by sudden rotational movements and is the primary stimulus for the semicircular canal; hair cells are located within a bulge called the ampulla.
