CN V-Trigeminal Nerve

Question 1

Characteristics of CN V- Trigeminal nerve

Answer 1

1. Largest cranial nerve
2. Composed of three divisions: ophthalmic (V1), maxillary (V2), and mandibular (V3)
3. Fibers run from the face to the pons via the superior orbital fissure (V1), the foramen rotundum (V2), and the foramen ovale (V3)

Question 2

CN V Pathway

Answer 2

Question 3

Type of Nerve

Answer 3

Mixed nerve (sensory & motor)

V1 & V2 division: General sensation from face, scalp, eye, nasal & oral cavities

V3 division: Motor nerve to several muscles including mastication

Question 4

V1 Division- Opthalamic Nerve

Answer 4

Provide sensory to:

Skin of forehead
Scalp
Eyelids
Nose
Mucous membranes of paranasal sinuses
Nasal cavity

Question 5

V2 Division- Maxillary Nerve

Answer 5

Provide sensory to:

Skin of the face over maxilla
Teeth of the upper jaw
Mucous membrane of the nose
The maxillary sinus
Palate

Question 6

V3 Division- Mandibular Nerve

Answer 6

Provide motor impulses to:

Muscles of mastication
Mylohyoid
Anterior belly of digastric
Tensor tympani

Question 7

Clinical Application

Answer 7

Trigeminal Neuralgia

Cause pain in upper and lower teeth
Headaches
Pain in the gums and jaw
Pain is unilateral

Question 8

2-minute CN V

Answer 8

2-Minute Neuroscience: Trigeminal Nerve (Cranial Nerve V)

Adapted from Neuroscientifically Challenged | YouTube Channel