Last 4 Cranial Nerves

1. LAST 4 CRANIAL
NERVES
(Page 92)
Dr. Sherif Fahmy

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

3. Medulla
oblongata
Pons
Midbrain
Inferior
view of the
Brain
Dr. Sherif Fahmy

4. 9th
& 10th
CN
11th
CN 12th
CN
Medulla oblongata
Dr. Sherif Fahmy

5. Parotid gland
Carotid sheath
Lower 4 cranial ns
Styloid
process
Dr. Sherif Fahmy

6. Stylopharyngeus m.
Glossopharyngeal
nerve
Dr. Sherif Fahmy

7. Glossopharyngeal n.
Hyoglossus m.
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

9. Spinal
accessory n.
Dr. Sherif Fahmy

10. Glosso-pharyngeal nerve
(9th
C.N.)
(Page 92)
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

13. Vagus Nerve
(10th
CN)
(Page 94)
Dr. Sherif Fahmy

14. Medulla
Vagus
Sup. ganglion
Inf. ganglion
Carotid sheath
Styloid pr.
Post. Belly of
digastric m.
subclavian
art. Int. carotid
art.
Int. jugular
vein
Course
Dr. Sherif Fahmy

15. Branches
1- Meningeal
br. 2- Auricular br.
3- Pharyngeal
br.
4- Superior
laryngeal br.
Internal
laryngeal
br.
External
laryngeal
br.
5- Superior
cardiac
6-Inferior
cardiac
7- Recurrent
laryngeal n. Dr. Sherif Fahmy

16. Dr. Sherif Fahmy

17. Accessory Nerve
(11th
CN)
(Page 96)
Dr. Sherif Fahmy

18. Posterior belly of digastric
m.
Sterno-
mastoid m.
Spinal
accessor
y n.
Internal jugular vein
Dr. Sherif Fahmy

19. Spinal
accessory n.
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

21. Spinal accessory
n.
Sternomastoid
m.
Trapezius m.
Dr. Sherif Fahmy

22. Hypoglossal Nerve
(12th
CN)
(Page 98)
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