This document summarizes the 12 cranial nerves: - Cranial Nerves I, II, and III are olfactory, optic, and oculomotor nerves involved in smell, vision, and eye movement. - Cranial Nerves V, VII, and IX include the trigeminal, facial, and glossopharyngeal nerves responsible for sensation in the face and head and motor functions like facial expressions. - The remaining cranial nerves IV, VI, VIII, X, XI, and XII are trochlear, abducent, vestibulocochlear, vagus, accessory, and hypoglossal nerves with roles like eye movement and functions in the ear, throat, and

1. By: Dr. Pamela Josefina T. Fabie

3. Cranial Nerve I

4.  Component: Sensory
 Function: Smell
 Origin: Olfactory receptor nerve cells
 Opening to the Skull: Openings in
cribriform plate of ethmoid

6. Cranial Nerve II

7.  Component: Sensory
 Function: Vision
 Origin: Back of the eyeball
 Opening to the Skull: Optic Canal

9. Cranial Nerve III

10.  Component: Motor
 Function:
 Raises upper eyelid
 Turns eyeball upward, downward and
medially
 Constricts pupil
 Accommodates the eye
 Origin: Anterior surface of the midbrain
 Opening to the Skull: Superior orbital fissure

12. Cranial Nerve IV

13.  Component: Motor
 Function: Assisting in turning eyeball
downward and laterally
 Origin: Posterior surface of the midbrain
 Opening to the Skull: Superior orbital fissure

15. Cranial Nerve V

16. V. Trigeminal Nerve

17.  Component: Sensory
 Function:
 Cornea
 Skin of forehead
 Scalp
 Eyelids and nose
 Mucuos membranes of paranasal
sinuses and nasal cavity
 Origin: Anterior aspect of the pons
 Opening to the Skull: Superior orbital fissure

18. Infratrochlear

19. V1. Ophthalmic Nerve

20. o Component: Sensory
o Function:
o Skin of the face over maxilla
o Teeth of the upper jaw
o Mucous membrane of the nose, the
maxillary sinus and palate
o Origin: Anterior aspect of the pons
o Opening to the Skull: Foramen ovale

21. V2. Maxillary Nerve

22. o Component: a. Motor
o Function:
o Muscles of mastication
o Mylohyoid
o Anterior belly of digastric
o Tensor veli palatine
o Tensor tympani
o Origin: Anterior aspect of the pons
o Opening to the Skull: Foramen Rotundum

23. • Component: b. Sensory
• Function:
• Skin of cheek
• Skin over mandible and side of head
• Teeth of lower jaw and TMJ
• Mucous membrane of mouth and anterior
part of tongue
• Origin: Anterior aspect of the pons
• Opening to the Skull: Foramen Rotundum

24. V3. Mandibular Nerve

25. Cranial Nerve VI

26.  Component: Motor
 Function: Lateral rectus muscle turns eyeball
laterally
 Origin: Anterior Surface of hindbrain
between pons and medulla
 Opening to the Skull: Superior orbital fissure

27. VI. Abducent Nerve