Glossopharyngeal nerve Domina Petric MD IX cranial nerve

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Glossopharyngeal nerve Domina Petric, MD

Glossopharyngeal nerve Domina Petric, MD

IX. cranial nerve has 5 functional pieces: • Special visceral afferent fibres for sensation

IX. cranial nerve has 5 functional pieces: • Special visceral afferent fibres for sensation of taste from posterior third of the tongue. • General visceral afferent fibres for general visceral sensation from posterior third of the tongue, pharyngeal isthmus, tonsils, nasopharynx, tympanic cavity and carotid sinus. 12/15/2021 2

IX. cranial nerve has 5 functional pieces: • General somatic afferent fibres for sensation

IX. cranial nerve has 5 functional pieces: • General somatic afferent fibres for sensation from external ear. • Special visceral efferent fibres for innervation of stylopharyngeus muscle. • General visceral efferent parasympathetic fibres for innervation of parotid gland. 12/15/2021 3

Nuclei • nucleus ambiguus (special visceral efferent fibres) • nucleus salivatorius inferior (general visceral

Nuclei • nucleus ambiguus (special visceral efferent fibres) • nucleus salivatorius inferior (general visceral efferent fibres) • nucleus solitarius (general and special visceral afferent fibres) • nucleus spinalis n. trigemini (general somatic afferent fibres) 12/15/2021 4

Foramen jugulare Inside Foramen jugulare • Ganglion superior is inside the jugular foramen: bodies

Foramen jugulare Inside Foramen jugulare • Ganglion superior is inside the jugular foramen: bodies of general somatic afferent neurons of IX. cranial nerve. Foramen jugulare Below Foramen jugulare • Ganglion inferior is just below the jugular foramen: bodies of general and special visceral afferent neurons of IX. cranial nerve. 12/15/2021 5

Teach. Me. Anatomy. com Anatomymcqs. com 12/15/2021 6

Teach. Me. Anatomy. com Anatomymcqs. com 12/15/2021 6

Branches of IX. cranial nerve N. tympanicus forms plexus tympanicus: • tympanic cavity mucosa

Branches of IX. cranial nerve N. tympanicus forms plexus tympanicus: • tympanic cavity mucosa nn. caroticotympanici • mastoid air cells • auditory tube mucosa (r. tubarius) • ganglion tympanicum • communication fibres from facial nerve 12/15/2021 7

Branches of IX. cranial nerve N. petrosus minor is extension of the tympanic nerve

Branches of IX. cranial nerve N. petrosus minor is extension of the tympanic nerve that goes into the ganglion oticum. Transfers general visceral efferent parasympathetic fibres for the innervation of parotid gland. 12/15/2021 8

Branches of IX. cranial nerve R. communicans cum ramo auriculare n. vagi: communication branch

Branches of IX. cranial nerve R. communicans cum ramo auriculare n. vagi: communication branch for vagal nerve. 12/15/2021 9

Branches of IX. cranial nerve R. sinus carotici transfers general visceral afferent fibres from

Branches of IX. cranial nerve R. sinus carotici transfers general visceral afferent fibres from chemoreceptors in carotid body and baroreceptors from carotid sinus. 12/15/2021 10

Branches of IX. cranial nerve • Rr. pharyngei are motoric, sensory and parasympathetic fibres

Branches of IX. cranial nerve • Rr. pharyngei are motoric, sensory and parasympathetic fibres that come from nucleus ambiguus and nucleus salivatorius inferior, and go as afferent fibres into nucleus solitarius. • Pharyngeal branches together with sympathetic fibres and vagal nerve form plexus pharyngeus that innervates pharyngeal muscles, mucosa and glands. 12/15/2021 11

Branches of IX. cranial nerve R. musculi stylopharyngei transfers special visceral efferent fibres from

Branches of IX. cranial nerve R. musculi stylopharyngei transfers special visceral efferent fibres from nucleus ambiguus for the stylopharyngeus muscle. 12/15/2021 12

Branches of IX. cranial nerve Rr. tonsillares are sensory branches that transfer the sensation

Branches of IX. cranial nerve Rr. tonsillares are sensory branches that transfer the sensation from tonsils and soft palate into the nucleus solitarius. 12/15/2021 13

Branches of IX. cranial nerve Rr. linguales transfer the sensation of taste from the

Branches of IX. cranial nerve Rr. linguales transfer the sensation of taste from the basis of tongue. 12/15/2021 14

Literature: • • • Teach. Me. Anatomy. com Anatomymcqs. com Krmpotić-Nemanić J. Marušić A.

Literature: • • • Teach. Me. Anatomy. com Anatomymcqs. com Krmpotić-Nemanić J. Marušić A. Anatomija čovjeka, Medicinska naklada, Zagreb, 2007. 12/15/2021 15

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