Trigeminal nerve

Question 1

What are the 3 main divisions of the trigeminal nerve?

Answer 1

Ophthalmic (V1)
Maxillary (V2)
Mandibular (V3)

Question 2

The 3 branches of the trigeminal nerve arise from the trigeminal ganglion. Where is the trigeminal ganglion situated?

Answer 2

middle cranial fossa of the skull

Question 3

Where do each of the 3 branches exit the skull?

Answer 3

superior orbital fissure
foreman rotundum
foreman ovale

Question 4

Where do each of the 3 branches of the trigeminal nerve go when the exit the skull?

Answer 4

orbit
pterygopalatine fossa
infratemporal fossa

Question 5

What is the function of the ophthalmic branch?

Answer 5

general sensory information from the upper eyelid, cornea, conjunctiva, forehead, scalp and part of the nasal cavity

Question 6

What is the function of the maxillary division of the trigeminal nerve?

Answer 6

general sensory information from the lower eyelid, cheek, side of nose, part of the nasal cavity, upper lip, hard and soft palate and maxillary teeth and gingivae

Question 7

What is the function of the mandibular branch of the trigeminal nerve?

Answer 7

• general sensory to the anterior 2/3 of tongue, temporoauricular skin, side of nose, lower lip, chin and mandibular teeth and gingivae.
• motor innervation to the muscles of mastication

Question 8

What are the branches of the ophthalmic nerve?

Answer 8

the ophthalmic nerve branches off into the frontal nerve, lacrimal nerve and the nasocillary nerve.

• the frontal nerve branches of to the supraorbital nerve and the supratrochlear nerve
• the lacrimal nerves innervates the lacrimal gland
• the nasocillary nerve branches off into the posterior and anterior ethmoidal nerves, long ciliary nerves and the infratrochlear nerve