Sounds are vibrations
Ear
Outer ear directs sound waves
Moves sound to tympanic membrane
Middle ear transfers vibrations
Inner Ear
Hair cells that respond to tones and pitch
Basilar Membrane
Where sound waves push and pull
Basilar membrane moves as waves go by
Hair cells is where transduction occurs
Stereocilia
Hair cells that can bend back and forth on the basilar membrane
Gets pushed in different directions as sound waves go by
Forward bend depolarization (mechanically gated potassium channels to open)
Backward is hyperpolarize
Spiral ganglion cells-
Form the auditory nerve going up to the brain
Inner hair cells have a bigger impact
Hair cells respond to different frequencies depending where on the basilar membrane
Stream of Auditory Cortex
Posterior-Where
Anterior-What
Deafness
Conductive Deafness-
Damage to middle ear
Nerve Deafness-
Damage to cochlea
Cochlear Implant-
Sound like a robot to the patient
Helps convert electrical impulses to sound in inner ear to go to the brain
Cochlea is the inner ear
Ear
Outer ear directs sound waves
Moves sound to tympanic membrane
Middle ear transfers vibrations
Inner Ear
Hair cells that respond to tones and pitch
Basilar Membrane
Where sound waves push and pull
Basilar membrane moves as waves go by
Hair cells is where transduction occurs
Stereocilia
Hair cells that can bend back and forth on the basilar membrane
Gets pushed in different directions as sound waves go by
Forward bend depolarization (mechanically gated potassium channels to open)
Backward is hyperpolarize
Spiral ganglion cells-
Form the auditory nerve going up to the brain
Inner hair cells have a bigger impact
Hair cells respond to different frequencies depending where on the basilar membrane
Stream of Auditory Cortex
Posterior-Where
Anterior-What
Deafness
Conductive Deafness-
Damage to middle ear
Nerve Deafness-
Damage to cochlea
Cochlear Implant-
Sound like a robot to the patient
Helps convert electrical impulses to sound in inner ear to go to the brain
Cochlea is the inner ear
