PSYC 367 Lecture Notes - Lecture 9: Trapezoid Body, Azimuth, Stapedius Muscle
Document Summary
Distinguish among conductive hearing loss, sensorineural hearing loss, and central auditory processing disorder in terms of the location of the damage and the ability to hear air-conducted and bone-conducted sound. Describe otitis media, otosclerosis, retrocochlear dysfunction, and presbycusis; state the type of hearing loss each condition usually produces. Relate loudness recruitment, the acoustic reflex, and tinnitus to learning loss. Give the current means of treating conductive and sensorineural hearing loss, tinnitus and central auditory processing disorder. Describe two types of binaural information that humans can use to locate the position of sound at a certain elevation. Describe the brainstem physiology for processing this information. Describe 2 additional sources of information that allow us to localize sounds with ambiguous intensity and time difference. Conductive loss: disturbance in mechanical transmission of sound through outer/middle ear. Caused by injured eardrum, infections (otitis media), abnormal growth of ossicles (otosclerosis) Sensorineural loss: more common and more serious. Decreased activity or injury of hair cells.
