Lab 37 Ear and Hearing

What test is done to assess possible conduction deafnesss by comparing bone and air conduction?

Rinne Test (tuning fork)

External acoustic meatus

S-shaped tube leading to tympanic membrane

Tympanic cavity

air-filled space containing auditory ossicles within middle ear

Stapes

auditory ossicle attached to oval window

Malleus

auditory ossicle attached to tympanic membrane

Bony labyrinth

bony chambers of inner ear in temporal bone

Membranous labyrinth

chambers containing endolymph within bony labyrinth

Tympanic membrane (eardrum)

cone-shaped, semitransparent membrane attached to malleus

Pharyngotympanic (auditory) tube

connects middle ear and pharynx

Tectorial membrane

contacts hairs of hearing receptors

Sound loudness is measured in

decibels

Scala tympani

extends from apex of cochlea to round window and contains perilymph

Scala vestibuli

leads from oval window to apex of cochlea and contains perilymph

Hearing is interpreted in the

temporal lobe of the cerebrum

Cochlear duct

tube within cochlea containing spiral organ and endolymph

The middle ear bones articulate from tympanic membrane to oval window in what sequence?

malleus, incus, stapes