Facial Nerve Vestibulocochlear

Greater petrosal nerve Deep petrosal nerve (from internal carotid plexus) Lesser petrosal nerve Nerve (vidian) of pterygoid canal

Otic ganglion Pterygopalatine ganglion

Facial muscles

Frontal belly (frontalis) of occipitofrontalis

Orbicularis oculi

Facial nerve (VII)

Corrugator supercilii

Zygomaticus major┬╗

Zygomaticus minor

Procerus

Levator labii superioris

Levator labii superioris alaeque nasi

Levator anguli oris

Nasalis

Internal acoustic meatus Intermediate nerve

Motor nucleus of facial nerve Superior salivatory nucleus Solitary tract nucleus

Depressor septi nasi'

Orbicularis oris

Depressor anguli oris -

Mentalis

(Risorius) (not shown)

Buccinator Platysma-

Facial nerve (VII)

Corrugator supercilii

Zygomaticus major┬╗

Zygomaticus minor

Depressor septi nasi'

Orbicularis oris

Depressor anguli oris -

Mentalis

(Risorius) (not shown)

Buccinator Platysma-

Depressor labii inferioris-

Jacobson Nerve

Efferent fibers Afferent fibers

Parasympathetic fibers

----Sympathetic fibers

Occipital belly

(occipitalis) of occipitofrontalis muscle

Branches to auricular muscles

Posterior auricular nerve

Nerve to stapedius muscle

Stylomastoid foramen

Tympanic plexus

Tympanic nerve (Jacobson) (from glossopharyngeal nerve)

Glossopharyngeal nerve (IX)

Digastric muscle (posterior belly)

Stylohyoid muscle

Caroticotympanic nerve (from internal carotid plexus)

Depressor labii inferioris-

Efferent fibers Afferent fibers

Parasympathetic fibers

----Sympathetic fibers

Sublingual gland

Submandibular gland

Submandibular g Lingual nerve (from trigeminal nerve) Chorda tympani nerve

Occipital belly

(occipitalis) of occipitofrontalis muscle

Occipital branch of posterior auricular nerve

Branches to auricular muscles

Posterior auricular nerve

Nerve to stapedius muscle

Stylomastoid foramen

Tympanic plexus

Tympanic nerve (Jacobson) (from glossopharyngeal nerve)

Glossopharyngeal nerve (IX)

Digastric muscle (posterior belly)

Stylohyoid muscle

Caroticotympanic nerve (from internal carotid plexus)

Afferent fibers

Facial canal

Geniculum of facial nerve (site of geniculate ganglion)

Greater petrosal nerve Cochlear (spiral) ganglion Vestibular nerve Cochlear nerve

Tympanic cavity

Chorda tympani nerve Head of malleus Incus

Motor root of facial nerve and intermediate nerve

Vestibulocochlear nerve (VIII)

Medulla oblongata (cross section)

Afferent fibers

Facial canal

Geniculum of facial nerve (site of geniculate ganglion)

Tympanic cavity

Motor root of facial nerve and intermediate nerve

Vestibulocochlear nerve (VIII)

Geniculum Facial Nerve

Ampulla of posterior semicircular duct

Ampulla of lateral semicircular duct

Ampulla of superior semicircular duct of vestibular nerve

Ampulla of lateral semicircular duct

Ampulla of superior semicircular duct

Ampulla of posterior semicircular duct of vestibular nerve

Glossopharyngeal Nerve (IX): Schema

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