CranialandCervicalNerves

1

VestibulocochlearNerve(VIII):Schema

Plate125



Afferent fibers

Geniculum (geniculate

ganglion) of facial nerve

Facial canal

Greater petrosal nerve

from intermediate nerve

Cochlear (spiral) ganglion

Vestibular nerve

Cochlear nerve*

Tympanic cavity

Chorda tympani nerve

from intermediate nerve

Motor root of facial nerve

and intermediate nerve

Vestibulocochlear

nerve (VIII)

Medulla oblongata

(cross section)

Internal

acoustic

meatus

Medial

Superior

Inferior

Lateral

Vestibular

nuclei

(diagrammatic)

Anterior

Posterior

Cochlear

nuclei

Inferior cerebellar

peduncle (to cerebellum)

Vestibular ganglion

*Note: The cochlear nerve also contains efferent fibers to the sensory epithelium.

These fibers are derived from the vestibular nerve while in the internal auditory meatus.

Inferior division

Superior division

Saccule

Ampulla of posterior

semicircular duct

Utricle

Ampulla of superior

semicircular duct

Ampulla of lateral

semicircular duct

of vestibular nerve

Head of malleus

Incus