MCAT Behavioral Sciences-Ear Anatomy Diagram | Quizlet

TERM

Pinna (auricle)

DEFINITION

Outer part of the ear

TERM

Tympanic membrane (eardrum)

DEFINITION

Divides the outer ear from the middle ear

TERM

Malleus

DEFINITION

First ossicle (from ear drum to cochlea)

TERM

Incus

DEFINITION

Second (middle) ossicle

TERM

Stapes

DEFINITION

Third ossicle (from ear drum to cochlea)

TERM

Cochlea

DEFINITION

Detects sound

TERM

Semicircular canals

DEFINITION

Detect rotational acceleration

TERM

Auditory (Eustachian) tube

DEFINITION

Connects the middle ear to the nasal cavity; helps equalize pressure between the middle ear and the environment

TERM

Vestibulocochlear nerve

DEFINITION

Bring information from inner ear to the brain; responsible for sound and balance

Vestibule

Includes the utricle and saccule; detects linear acceleration

TERM

Round window

DEFINITION

Membrane covered hole in the cochlea that permits the perilymph to move within the cochlea

Perilymph

Simultaneously transmits vibrations from the outside world and cushions the inner ear structures

TERM

External auditory canal

DEFINITION

Tube running from outer inner to middle ear

Auditory pathway

cochlea->vestibulocochlear nerve->medial geniculate nucleus (MGN) of thalamus->auditory cortex