Pharyngeal Plexus

Efferent fibers Afferent fibers Parasympathetic fibers

Tympanic nerve (Jacobson)

Tympanic cavity and plexus

Stylomastoid foramen

Caroticotympanic nerve (from internal carotid plexus)

Greater petrosal nerve

Deep petrosal nerve

Nerve (vidian) of pterygoid canal

Lesser petrosal nerve

Pterygopalatine ganglion

Mandibular nerve (V3)

Otic ganglion

Auriculotemporal nerve

Parotid gland

Tubal branch of tympanic plexus

Pharyngotympanic (auditory) tube and pharyngeal opening

Stylopharyngeus muscle (and branch from glossopharyngeal nerve)

Spinal tract and spinal nucleus of trigeminal nerve Solitary tract nucleus Nucleus ambiguus

Jugular foramen

Tympanic nerve (Jacobson)

Tympanic cavity and plexus

Stylomastoid foramen

Caroticotympanic nerve (from internal carotid plexus)

Greater petrosal nerve

Deep petrosal nerve

Nerve (vidian) of pterygoid canal

Lesser petrosal nerve

Pterygopalatine ganglion

Mandibular nerve (V3)

Otic ganglion

Auriculotemporal nerve

Parotid gland

Pharyngotympanic (auditory) tube and pharyngeal opening

Glossopharyngeal Nerve Cervical Plexus

Glossopharyngeal nerve (IX)

Jugular foramen

Pharyngeal plexus

Pharyngeal, tonsillar and lingual branches of glossopharyngeal nerve

Pharyngeal branch of vagus nerve

External carotid artery

Vagus nerve (X)

Superior cervical sympathetic ganglion

Sympathetic trunk

Carotid branch of glossopharyngeal nerve

Internal carotid artery

Carotid sinus

Carotid body

Glossopharyngeal nerve (IX)

Pharyngeal plexus

Pharyngeal, tonsillar and lingual branches of glossopharyngeal nerve

Pharyngeal branch of vagus nerve

External carotid artery

Communication to auricular branch of vagus nerve

Superior and Inferior ganglia of Glossopharyngeal nerve

Communication to facial nerve (VII)

Vagus nerve (X)

Superior cervical sympathetic ganglion

Sympathetic trunk

Carotid branch of glossopharyngeal nerve

Internal carotid artery

Carotid sinus

Carotid body

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