1. By
Dr Gejo johns B.DS, MDS
GLOSSOPHARYNGEAL
NERVE
Gloss pharyngeal nerve by Dr Gejo Johns
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2. Introduction
Gloss pharyngeal nerve is the ninth
cranial nerve.
It is the nerve of the third brachial
arch.
It is motor to the stylopharyngeus .It is
secreto motor to the parotid gland and
gustatory to the posterior one third of the
tongue including circumvallate papilla
Gloss pharyngeal nerve by Dr Gejo Johns
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3. Functional components
Special visceral efferent fibers arise in nucleus
ambiguus and supply the stylopharyngeus
muscle .
General visceral efferent fibers (preganglionic)
arises in inferior salivatory nucleus and travel to
the otic ganglion , post ganglionic fibers arising in
the ganglion to supply the parotid gland
General visceral afferent fibers carry general
sensation from the pharynx, carotid body, and
carotid sinus to the ganglion
Gloss pharyngeal nerve by Dr Gejo Johns
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4. Special visceral afferent fibers carry
sensation of taste from the posterior one third
of the tongue including circumvallate papillae
to the ganglion.
General somatic afferent fibers carry
general sensation such as pain ,touch,
temperature from posterior one third of the
tongue and tonsil.
Gloss pharyngeal nerve by Dr Gejo Johns
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5. Intra cranial course and relation
o Pass forwards and laterally between olive and cerebellar
peduncle
Gloss
pharyngeal
nerve
Gloss pharyngeal nerve by Dr Gejo Johns
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6. Unite and form single trunk and passes forwards
and laterally towards jugular foramen
Grooves the jugular tubercle and occipital bone
Gloss pharyngeal nerve by Dr Gejo Johns
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7. Leaves the skull through middle part of jugular foramen
anterior to vagus and accessory nerve.
Has separate Dura matter
Gloss pharyngeal nerve by Dr Gejo Johns
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8. Extra cranial course
B/W Int. Jugular vien and Int.
Carotid artery deep to the styloid
process
Turns forward and wind round
lateral aspect of
stylopharyngeus
passes between Int. and Ext.
Carotid artery
Reaches side of pharynx and
gives pharyngeal branches
Passes deep to hyoglossus and
enters submandibular region
giving off tonsillar and lingual
branches Gloss pharyngeal nerve by Dr Gejo Johns
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10. o Tympanic branch
o Carotid branch
o Pharyngeal branch
o Muscular branch
o Tonsillar branch
o Lingual branches
Gloss pharyngeal nerve by Dr Gejo Johns
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11. Inferior
ganglion of
glossophary
ngeal nerve
Tympan
ic nerve
Middle
ear
Tympani
c
canaliculus
Tympanic
plexus
Lesser
petrosal
Pre
ganglionic
secretomotor
fibers to Otic
ganglion
parotid
Tympanic
branch
Gloss pharyngeal nerve by Dr Gejo Johns
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12. Tympanic nerve
Tympanic nerve is a branch of inferior ganglion of
gloss pharyngeal nerve.
It enters the middle ear through the tympanic
canaliculus take part in the formation of the
tympanic plexus in the middle ear and distributes
its fibers to middle ear the auditory tube ,the
mastoid antrum and air cells.
One branch of the plexus is the lesser petrosal
nerve which contain preganglionic secretomotir
fibers for the parotid gland and relays in otic
ganglion. Gloss pharyngeal nerve by Dr Gejo Johns
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13. Carotid branch
The carotid branch descend on the internal
carotid artery and supplies the carotid sinus
and carotid body.
Gloss pharyngeal nerve by Dr Gejo Johns
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14. Pharyngeal branch
The pharyngeal branch takes part in the formation of
the pharyngeal plexus , along with vagus and
sympathetic fibers.
The gloss pharyngeal fibers are distributed to the
mucous membrane of the pharynx.
Gloss pharyngeal nerve by Dr Gejo Johns
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15. Muscular branch
The muscular branch supplies the
stylopharyngeus.
Gloss pharyngeal nerve by Dr Gejo Johns
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16. Tonsilar branch
The tonsilar branch supply the tonsil and join
the lesser palatine nerve to form plexus from
which fibers distributed to soft plate and
palatoglossal arches.
Gloss pharyngeal nerve by Dr Gejo Johns
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17. Lingual branches
The lingual branches carry taste sensation and
general sensation from the posterior one third of
the tongue including circumvallate papillae.
Gloss pharyngeal nerve by Dr Gejo Johns
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18. Applied anatomy
Any damage happen to gloss pharyngeal nerve
causes.
Difficulty in swallowing
Loss of general sensation around posterior one
third of the tongue, palate, and pharynx
Loss of taste sensation over the posterior one
third of the tongue and palate
Dysfunction of the parotid gland due to damage
to preganglionic secretomotour fibers
Loss of gag reflex
Gloss pharyngeal nerve by Dr Gejo Johns
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19. • Gloss pharyngeal nerve is tested clinically
• On tickling the posterior wall of pharynx there is a reflex contraction
of pharyngeal muscles
• Taste sensibility on the post. 1/3 of tongue can be tested
• Pharyngitis may cause referred pain to ear as both are supplied by IX.
Gloss pharyngeal nerve by Dr Gejo Johns
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20. Gloss pharyngeal Neuralagia
Gloss pharyngeal nerve by Dr Gejo Johns
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Gloss pharyngeal neuralgia is an irritation of
the ninth cranial nerve causing extreme pain
in the back of the throat, tongue and ear.
Attacks of intense, electric shock-like pain can
occur without warning or can be triggered by
swallowing.
21. References
Cunningham’s Textbook of Anatomy – 12th
Edition
Last’s Textbook of Head and Neck Anatomy
Textbook of Head and Neck Anatomy by B.K.B
Berkovitz,B.J. Moxham
Frank H Netter MD – Atlas of Human Anatomy 4
th Edition
Gloss pharyngeal nerve by Dr Gejo Johns
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