the trigeminal nerve

Question 1

what are the 3 main divisions of the trigeminal nerve?

Answer 1

ophthalmic
maxillary
mandibular

Question 2

what are the modalities of the divisions of the trigeminal nerve?

Answer 2

ophthalmic - motor only
maxillary - motor only
mandibular - motor and sensory

Question 3

explain the course of the mandibular division of the trigeminal nerve

Answer 3

the mandibular division of the trigeminal nerve passes through the foramen ovale and divides into anterior and posterior divisions

Question 4

which division of the mandibular branch of the trigeminal nerve is usually larger?

Answer 4

the posterior division is usually larger than the anterior division

Question 5

what are the branches of the anterior division of the mandibular branch of the trigeminal nerve?

Answer 5

motor:
masseteric nerve (to masseter)
nerve to lateral pterygoid
2x deep temporal nerves (to temporalis)

sensory:
buccal (to the skin of the cheek and mucous membrane of the mouth)

Question 6

what are the branches of the posterior division of the mandibular branch of the trigeminal nerve?

Answer 6

sensory:
auriculotemporal (to scalp, auricle, tympanic membrane, TMJ and external auditory meatus)

lingual (to mucous membrane, floor of mouth and anterior two thirds of the tongue)

sensory and motor:
inferior alveolar (sensory to lower teeth and skin)

mylohyoid nerve (to mylohyoid and anterior belly of digastric)

Question 7

what are the branches of the posterior division of the mandibular branch of the trigeminal nerve?

Answer 7

sensory:
auriculotemporal (to scalp, auricle, tympanic membrane, TMJ and external auditory meatus)

lingual (to mucous membrane, floor of mouth and anterior two thirds of the tongue)

sensory and motor:
inferior alveolar (sensory to lower teeth and skin)

mylohyoid nerve (to mylohyoid and anterior belly of digastric)

Question 8

how does the mandibular branch of the external carotid artery exit the skull?

Answer 8

through the infra temporal fossa