1. Cranial Nerves

2. Cranial Nerve 1: Olfactory Nerve

3. Cranial Nerve II: Optic Nerve

4. Cranial Nerves III, IV, VI: Oculomotor, Trochlear, Abducens
Nucleus in midbrain
Innervates 4 extraocular muscles and functions in most eye movements
Contains parasympathetic which innervates pupillary constrictor muscles
and ciliary muscle of lens.
Trochlear
Nerve exits dorsal surface and crosses over
Moves eye medially and downward
Abducens
Nucleus in pons
Moves eye laterally

5. Oculomotor (III) Nerve9

6. Oculomotor (III) Nerve

7. 8

8. Trochlear (IV)
Nerve

9. Abducent (VI)
Nerve

10. Cranial Nerve V: Trigeminal Nerve
Trigeminal ganglion
Ophthalmic, maxillary and mandibular divisions
Sensory: Touch, pain, temp, proprioception for face, oral and nasal cavities.
Motor: Muscles for mastication.

11. Cranial Nerve V: Trigeminal Nerve
V1. Ophthalmic
Exits with eye muscle group (superior orbital fissure, through orbit to superior orbital notch/foramina)
Sensory to forehead, nasal cavity
V2. Maxillary
Exits foramen rotundum through wall of maxillary sinus to inferior orbital foramina)
Sensory to cheek, upper lip, teeth, nasal cavity
V3. Mandibular
Exits foramen ovale to mandibular foramen to mental foramen
Motor to jaw muscles-Masseter, temporalis, pterygoids, digastric
Sensory to chin
Taste Sensory to tongue (from facial N.) 16

12. Ophthalmic (V1)
Nerve

13. Ophthalmic (V1)
Nerve

14. Ophthalmic (V2) (nasal, palatine)
Nerve

15. Ophthalmic (V2) (palatine)

16. Ophthalmic (V2) (sup. Alveolar)

17. Ophthalmic (V2) (inf. orbital)

18. Ophthalmic (V3)

19. Ophthalmic (V3)

20. Cranial Nerve VII: Facial Nerve
Motor function: muscles of facial expression.
Parasympathetic function: innervation to lacrimal glands and some salivary gland.
Visceral sensory function: taste from anterior 2/3 of tongue

21. Cranial Nerve VII: Facial Nerve15

22. Cranial Nerve VIII: Vestibulocochlear Nerve
Auditory and vestibular sensation
Travels with facial nerve
Branches go to cochlea, vestibule

23. Vestibular and Cochlear Sensory Organs

24. Cranial Nerve X: Vagus Nerve
Motor function: pharyngeal muscles & laryngeal muscles
Parasympathetic function: heart, lungs, most if digestive tract.
Somatic sensation function: sensation from pharynx, meninges, external auditory meatus

25. Cranial Nerve IX: Glossopharyngeal Nerve
Motor function: stylopharyngeus muscle which elevates pharynx during
talking and swallowing.
Parasympathetic function: innervation of parotid salivary gland.

26. Cranial Nerve XI: Spinal Accessory Nerve

27. Cranial Nerve XII: Hypoglossal Nerve10