Trigeminal Nerve (5th Cranial)

Question 1

What are the two roots of the trigeminal nerve?

Answer 1

Arise from pons
1. Sensory root (largest)
2. Motor root (smallest)

Question 2

Sensory root

Answer 2

Has trigeminal ganglion lying in special depression in petrous bone anterior surface near its apex.

Question 3

Sensory root branches

Answer 3

1. Ophthalmic
2. Maxillary
3. Mandibular

Question 4

Sensory root cutaneous supply

Answer 4

1. Skin of scalp
2. Face
3. Anterior 2/3 tongue

Question 5

Motor root fate

Answer 5

Joins mandibular nerve

Question 6

Motor root supply

Answer 6

8 muscles
1. 4 muscles of mastication
2. Tensor Palati
3. Tensor tympani
4. Mylohyoid
5. Anterior belly digastric