Sound travels down the external auditory meatus and vibrates
the tympanic membrane. The vibration
passes to the malleus, incus, and then the stapes. The sound then enters the oval window and
travels into the bony labyrinth. It
causes vibrations of the perilymph inside the scala vestibuli. Some sound enters the membranous labyrinth by
vibrating the vestibular membrane. This
causes vibrations of the endolymph, which vibrates the basilar and tectorial
membranes. These membranes clap
together. Between the membranes lies the
organ of corti. The organ of corti
creates graded potentials in response to the vibrations of the basilar and
tectorial membranes via specialized structures known as hair cells. The vibration then can pass through the scala
tympani, through the round window, and into the mouth via the auditory tube.
Saturday, November 5, 2016
Sound Transduction in Human Ears
Sound travels down the external auditory meatus and vibrates
the tympanic membrane. The vibration
passes to the malleus, incus, and then the stapes. The sound then enters the oval window and
travels into the bony labyrinth. It
causes vibrations of the perilymph inside the scala vestibuli. Some sound enters the membranous labyrinth by
vibrating the vestibular membrane. This
causes vibrations of the endolymph, which vibrates the basilar and tectorial
membranes. These membranes clap
together. Between the membranes lies the
organ of corti. The organ of corti
creates graded potentials in response to the vibrations of the basilar and
tectorial membranes via specialized structures known as hair cells. The vibration then can pass through the scala
tympani, through the round window, and into the mouth via the auditory tube.
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