2. Deep Origin (Nuclei) of Last 4 cranial
nerves
9th
C.N.
10th
C.N. 11th
C.N. 12th
C.N.
Motor -Nucleus Ambiguus Hypo-
glossal
nucleus
Sensory Spinal nucleus of
trigeminal nerve
No No
Taste Nucleus solitarius No No
Para-
sympathetic
Inf. Salivary (9th
)
& dorsal nucleus
(10th
)
No No
-Upper 5
cervical
segments
Dr. Sherif Fahmy
8. Superior belly
of omohyoid m.
Posterior belly of digastric
m.
Sterno-
mastoid m.
Spinal
accessor
y n.
Vagus nerve
Hypoglossa
l n.
Descenden
s
hypoglossi
Nerve to
thyrohyoid m.
Internal jugular vein
Ansa cervicalis
Dr. Sherif Fahmy
11. Medulla
Glosso-
pharyngeal n.
Jugular foramen
Superior
ganglion
Inferior ganglion
Int. jugular vein
Int. carotid art.
Carotid sinus
Ext. carotid art.
Middle constrictor m.
Hyoglossus
m.
Post 1/3
of tongue
Palatine
tonsil
Soft palate
Course
Carotid
sheath
Styloid process
Stylopharyngeus
m.
Dr. Sherif Fahmy
12. Glosso-
pharyngeal n.
Jugular foramen
Inferior ganglion
Carotid sinus
5- sensory
to post. 1/3
of tongue
6- to palatine
tonsil
7- to soft
palate
Branches
1-Tympanic
br.
Lesser superficial
petrosal n.
Stylo-
phayngeus m.
2-N.to stylo-
pharyngeus m.
3- Carotid n.
4- Pharyngeal br. To
pharyngeal plexus
Dr. Sherif Fahmy
20. Cranial root
Spinal root
Vagus nerve
Accessory nerve
Carotid sheath
Styloid
process
Posterior
belly of
digastric m.
Sterno-
mastoid m.
Trapezius m.
Spinal accessory n.
Course & Branches
Jugular foramen
Dr. Sherif Fahmy
23. Superior belly
of omohyoid m.
Posterior belly of digastric
m.
Sterno-
mastoid m.
Hypoglossa
l n.
Descenden
s
hypoglossi
Nerve to
thyrohyoid m.
Internal jugular vein
Ansa cervicalis
Dr. Sherif Fahmy
24. Hypoglossal n.
Br. From
C1 Nerve
Hypoglossal
canal
Carotid sheath
Styloid
process
Posterior
belly of
digastric m
Int. jugular
vein
Descendens cervicalis
Ansa cervicalis
Descendens
hypoglossi
N. To thyro-
hyoid m.
N. To genio-
hyoid m.
To all muscles of
tongue except
palato-glossus
Course & Branches
ICA
Medulla
Dr. Sherif Fahmy
