Friday, August 12, 2011
Briefly explain the role that each of the following plays in the process of hearing.?
Auditory ossicles, are made up of 3 small bones: malleus, incus, and stapes. As sound waves enter the ear, it vibrates the ear drum, it in turn moves the nearest ossicle, the malleus to which it is attached. The malleus then transmits the vibrations, via the incus, to the stapes, and so ultimately to the membrane of the fenestra ovalis, the opening to the vestibule of the inner ear. The basilar membrane within the cochlea of the inner ear is a stiff structural element that sense vibrations and sends signals to the cochlea nerve. Cochlear nerve → Cochlear nuclei → Superior olivary nuclei → Lateral lemniscus → Inferior colliculi → Medial geniculate nuclei → vestibulococchlear nerve. Primary auditory cortexseparates two liquid filled tubes that run along the coil of the cochlea, the scala media and the semi circular cs of the inner ear. Then neuro transmitters sends signals to the brain and it registers sounds.
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