Neuroanatomy Draw It To Know It

Vestibular and Auditory Systems 239

EXTERNAL EAR CANAL

Anterior

Posterior Lateral Medial

Vestibule

COCHLEA

SEMICIRCULAR CANALS

OSSICLES

Outer ear

Oval window

Round window

Eustachian tube

Cochlear duct

Tympanic duct

Vestibular duct Tymp mbrn

Utricle Saccule Apex

MIDDLE EAR CANAL INNER EAR CANAL

Malleus Incus

Stapes

Posterior canal

Anterior canal

Horizontal canal

VESTIBULOCOCHLEAR NERVE Vestibular segment Cochlear segment

Superior

Inferior

Left Anterior Right

Posterior

CORONAL, OBSERVER PERSPECTIVE - SLOW PHASE EYE MOVEMENTS Anterior canals

Posterior canals

Left canals

Right canals

Internal acoustic meatus

DRAWING 14-2 Th e Ear — Complete