Facial nerves

Question 1

What does the trigeminal nerve split into?

Answer 1

Opthalmic (V1)
maxillary (V2)
mandibular (V3)

Question 2

Which of these branches has a motor function?

Answer 2

Mandibular

- conducts motor neurons to head and neck

Question 3

Branches of the mandibular nerve

Answer 3

lingual nerve- tongue

inferior alveolar nerve- mandible

Question 4

What does the mandibular nerve innervate

Answer 4

Muscles of mastication

• medial and lateral pterygoid
• masseter
• temporalis

Question 5

The facial nerve is which branch

Answer 5

Seventh paired cranial nerve

Question 6

What does the facial nerve split into?

Answer 6

Temporal branch 
Zygomatic branch 
Buccal branch 
Marginal mandibular branch 
Cervical 
*To Zanzibar By Motor Car

Question 7

What is more superifical

Answer 7

trigeminal is more deep

Starts from higher up than the facial

Question 8

Temporal

Answer 8

Frontal branches
cross the zygomatic arch in order to reach the temporal region
Innervates- frontalis, orbicularis oculi, corrugator supercilii

Question 9

Zygomatic branch

Answer 9

transverse the zygomatic bone and reach the lateral angle of the orbit
Innervate- orbicularis oculi

Question 10

Buccal branch

Answer 10

Cheek area, mouth and eyes
joins opthalimic
Innervates- orbicularis oris, quadratus labii superiorius, buccinator, zygomatic major/minor (deep also supply buccinator)

Question 11

Marginal/ mandibular branch

Answer 11

under the anguli oris and platysma and supplies the chin and lower lip
innervates- mentalis

Question 12

Cervical branch

Answer 12

Innervates- platysma

Question 13

What supplies the muscles of mastication?

Answer 13

Maxillary

Question 14

What are the branches of the external Carotid artery

Answer 14

Superior thyroid artery
ascending pharyngeal arter
Lingual artery 
Facial artery 
Occipital artery 
Posterior auricular artery 
Maxillary arter 
Superfical temporal artery 
*Some anatomists like freaking out poor medical students

Question 15

What supplies blood to the masseter?

Answer 15

Branch of maxillary -Inferior alveolar artery

Question 16

Temporalis vascularization

Answer 16

Maxillary artery

Question 17

Lateral and Medial pterygoid

Answer 17

• Middle meningeal artery

- external carotid

Question 18

Buccinator blood supply

Answer 18

Internal carotid

Question 19

Tooth extraction what does the dentist do? and how does the dentist know If this is successful?

Answer 19

the dentist will anaesthetise the inferior alveolar nerve right at the back of the mouth before it enters the mandibular foramen.

Question 20

TMJ joint 3 surfaces

Answer 20

mandibular fossa
articular tubercle
mandibular head

Question 21

What is the mechanism of the joint?

Answer 21

The bone surfaces never come in contact with each other
separated by articular disk
splits the 2 synovial joint cavities
articular surface are covered by fibrocartilage

Question 22

Ligaments of the TMJ

Answer 22

1. lateral ligament- thickens to prevent joint dislocation
2. Sphenomandibular ligament – originates from the sphenoid spine, and attaches to the mandible.
3. Stylomandibular ligament- supports weight of jaw

Question 23

Movements of the jaw

Answer 23

Protrusion- lateral pterygoid
Retraction- temporalis
Elevation- masseter
depression- medial pterygoif

Question 24

Blood supply to the TMJ

Answer 24

external carotid

superficial temporal branch

Question 25

Nerve supply to the TMJ

Answer 25

Mandibular nerve