Mandibular Nerve

Question 1

Origin

Answer 1

1. Sensory root (large): trigeminal ganglion
2. Motor root (small): trigeminal nerve (pons)

Question 2

Course and End

Answer 2

Leave skull: through foramen ovale
Unite: just below foramen ovale
Form main trunk: descends 1cm in infratemporal fossa in front of mandible neck
End by dividing into:
1. Anterior division: small mainly motor
2. Posterior division: large mainly sensory

Question 3

Branches: from trunk

Answer 3

Motor:
1. Nerve to medial pterygoid
Sensory:
1.Nerve spinosus

Question 4

Branches: from anterior division

Answer 4

Motor
1. Two deep temporal nerves
2. Nerve to masseter
3. Nerve to lateral pterygoid
Sensory
1. Buccal nerve

Question 5

Branches: from posterior division

Answer 5

1. Auriculotemporal nerve
2. Inferior alveolar nerve
3. Lingual nerve

Question 6

Auriculotemporal nerve branches

Answer 6

1. Parotid
2. Articular
3. Sensory

Question 7

Inferior alveolar nerve branches

Answer 7

1. Nerve to mylohyoid
2. Dental branches
3. Mental nerve

Question 8

Lingual nerve branches

Answer 8

1. General sensory
2. Taste sensory
3. Parasympathetic

Question 9

Nerve to medial pterygoid supply

Answer 9

1. Medial pterygoid
2. Tensor palati
3. Tensor tympani

Question 10

Nervus spinosus course and supply

Answer 10

1. Enters middle cranial fossa through foramen spinosum.
2. Supply Dura.

Question 11

Two deep temporal nerves supply

Answer 11

Temporalis muscle

Question 12

Nerve to masseter muscle course

Answer 12

Pass through mandibular notch

Question 13

Buccal nerve supply

Answer 13

Continuation of anterior division
1. Skin covering buccinator muscle
2. Mucosa lining buccinator muscle

Question 14

Auriculotemporal nerve course

Answer 14

1. Arises by 2 roots around middle meningeal artery
2. Passes backwards deep to mandible neck
3. Ascend within parotid behind TMJ
4. Leaves parotid through its upper end
5. Cross zygomatic arch to reach scalp
6. Divide into branches

Question 15

Parotid nerve supply

Answer 15

1. Sympathetic fibers
2. Parasympathetic fibers (Otic ganglion)
3. Sensory fibers

Question 16

Articular nerve supply

Answer 16

TMJ

Question 17

Sensory nerve supply

Answer 17

1. Skin upper 2/3 lateral surface auricle
2. Posterior 1/2 temple
3. External auditory meatus
4. Ear drum

Question 18

Inferior alveolar nerve course

Answer 18

Largest branch of posterior division
1. Descends on medial pterygoid behind lingual nerve
2. Enters mandibular foramen
3. Runs in mandibular canal
4. Ends in mental foramen
5. Divide into mental and incisive terminal branches

Question 19

Nerve to mylohyoid course and supply

Answer 19

Runs in mylohyoid groove
Supply
1. Mylohyoid
2. Anterior belly of digastric muscle

Question 20

Dental branches course and supply

Answer 20

Arises in mandibular canal
1. Lower molars
2. Premolars (inferior alveolar)
3. Lower incisors
4. Canine (incisive branch)
5. Gum
6. Alveolar bone

Question 21

Mental nerve course and supply

Answer 21

Comes out of mental foramen
1. Skin of chin
2. Lower lip

Question 22

Lingual nerve course deep to mandible ramus

Answer 22

1. Joined by chorda tympani deep to lateral pterygoid
2. Descends on medial pterygoid in front of inferior alveolar nerve

Question 23

Lingual nerve course deep to mandible body

Answer 23

1. Passes forward in faint groove below last molar covered by mucosa

Question 24

Lingual nerve course at tongue side

Answer 24

1. Crosses styloglossus then hyoglossus
2. Suspends submandibular ganglion by 2 roots
3. Hooks around submandibular duct
4. Passes forward deep to sublingual gland to reach tongue

Question 25

General sensory supply

Answer 25

1. Anterior 2/3 tongue 2. Gum 3. Floor of mouth 4. Submandibular gland 5. Sublingual gland

Question 26

Taste sensory supply

Answer 26

From chorda tympani 1. Anterior 2/3 tongue

Question 27

Parasympathetic nerve supply

Answer 27

From chorda tympani Relay in submandibular ganglion 1. Submandibular gland 2. Sublingual gland