Mandibular Divison

Question 1

What does V3 or Mandibular Nerve course/contain

Answer 1

located @ inferior angle of trigeminal ganglion, contains initial large GSA, then small SVE (motor comes off lateral aspect of pons)-to- foramen ovale, then unite

Question 2

What are the 2 branches of V3

Answer 2

Undivided (only 2-3mm in length) & Divided Nerve

Question 3

What are the 4 sub-branches of the Undivided Nerve?

Answer 3

Meningeal (sensory), Medial Pterygoid (motor), Nerve to Tensor Veli Palatini (motor), and Nerve to Tensor Tympani (motor)

Question 4

What does the Meningeal Nerve (sensory) course/supply?

Answer 4

turns upward-to- Foramen Spinosum-to reenter brain, supplies sensory to meninges in cranial vault (senses meninges)

Question 5

What does the Medial Pterygoid Nerve (motor) supply?

Answer 5

Supplies medial pterygoid muscle, to elevate mandible

Question 6

What does the Nerve to Tensor Veli Palatini (motor) supply?

Answer 6

Supplies muscles of the soft palate, tenses the soft palate and opens the auditory tube during swallowing

Question 7

What does the Nerve to Tensor Tympani (motor) supply?

Answer 7

Supplies tensor tympani, tenses tympanic membrane or dampens sound

Question 8

What are the 2 sub-divisions of the Divided Nerve?

Answer 8

Anterior Division (smaller) & Posterior Division (larger)

Question 9

What are the 5 sub/sub-divisions of the Anterior Division?

Answer 9

Lateral Pterygoid (motor), Masseter (motor), Anterior Deep Temporal (motor), Posterior Deep Temporal (motor), and Buccal (sensory)

Question 10

What does the Lateral Pterygoid Nerve (motor) supply?

Answer 10

Supplies lateral pterygoid, to protrude the mandible, in class 3 occlusion

Question 11

What does the Masseter Nerve (motor) supply?

Answer 11

Supplies the masseter muscle & TMJ, to elevate the mandible

Question 12

What does the Anterior Deep Temporal Nerve (motor) supply?

Answer 12

Supplies anterior portion of temporalis muscle, elevate the mandible

Question 13

What does the Posterior Deep Temporal Nerve (motor) supply?

Answer 13

Supplies posterior portion of temporalis muscle, retracts the mandible, in class 2 occlusions

Question 14

What 2 does the Buccal Nerve (sensory) supply?

Answer 14

Supplies Facial Gingiva of Mand Molars & Skin of Cheek

Question 15

What are the 3 sub/sub-divisions of the Posterior Division?

Answer 15

Auriculotemporal (sensory), Lingual (sensory), and Inferior Alveolar (Mixed)

Question 16

What does the Auriculotemporal Nerve (sensory/small) supply?

Answer 16

Supplies parotid gland, TMJ, skin of ear, scalp over the temporal region.

Question 17

What does the Lingual Nerve (sensory) supply?

Answer 17

Supplies Lingual Gingiva of Mand Teeth, FOM, and Anterior 2/3 of tongue

Question 18

What does the Inferior Alveolar Nerve (mixed) supply/course through?

Answer 18

descends ramus on M (along buccal/lingual), is lateral to lingual nerve, enters mandibular canal to midline, supplies mandibular molars & 2nd Premolar

Question 19

What are the 3 sub/sub/sub-divisions of the Inferior Alveolar Nerve (mixed)?

Answer 19

Mylohyoid (motor), Mental (sensory), Incisive (sensory)

Question 20

What does the Mylohyoid Nerve (motor) course/supply?

Answer 20

outside mandibular foramen-to mylohyoid groove, supplies Mylohyoid muscle, Anterior Belly of Digastric, depresses the mandible

Question 21

What does the Mental Nerve (sensory) course/supply?

Answer 21

exit canal through mental foramen, continues external to midline, supplies skin of chin, lower lip, facial gingiva of mandibular anterior teeth & 1st premolar

Question 22

What does the Incisive Nerve (sensory) course/supply?

Answer 22

within canal-to midline, supplies mandibular anterior teeth & 1st premolar

Question 23

What are the stats of the mental foramen?

Answer 23

50% people, mental foramen located @ apex b/n 1st/2nd premolar, 25% mental foramen located at apex of 1st