Human Ear Flashcards
auricle (pinna-1)
-collects sound waves and directs them to auditory canal
external ear
-consists of auricle, helix, lobule, external auditory canal and tympanic membrane
external auditory canal (2)
-funnels sound waves to tympanic membrane
tympanic membrane (3)
-transmits sound waves from external to middle ear ossicles
tensor tympani muscle (6)
-mediates the attenuation reflex
malleus (8)
-transmits sound waves from tympanic membrane to oval window
incus (9)
-transmits sound waves from tympanic membrane to oval window
stapes (11)
-transmits sound waves from tympanic membrane to oval window
Eustachian tube (7)
-equalizes pressure between middle ear and external ear
oval window (13)
-transmits sound waves from middle ear to cochlea of inner ear
cochlea (18)
-registers sound waves and transmits them to cochlear nerve
vestibule (12)
-evaluates the position of the head in relation to gravity
semicircular canals
-detects movements of the head in three dimensions
anterior (superior) semicircular canal (16)
-detects movements of the head in three dimensions
posterior semicircular canal (17)
-detects movements of the head in three dimensions
lateral semicircular canal (15)
-detects movements of the head in three dimensions
bony ampullae
-contain the neuromast organs of the semicircular canals
anterior (superior) bony ampullae (16b)
-contain the neuromast organs of the semicircular canals
posterior bony ampullae (17c)
-contain the neuromast organs of the semicircular canals
lateral bony ampullae (15a)
-contain the neuromast organs of the semicircular canals
round window (14)
-dissipates sound energy from cochlea
vestibulocochlear nerve (19)
-transmits auditory and balance info from the ear to the brain
