face temporal and infratemporal fossa

Question 1

occipito frontalis

Answer 1

elevates eyebrow

Question 2

orbicularis oris

Answer 2

closes eyelids

Question 3

orbicularis oculi

Answer 3

closes mouth

Question 4

zygomaticus major

Answer 4

• elevates labial commissure

Question 5

platysma

Answer 5

depresses mandible against resistance, tenses facia of neck

Question 6

buccinator

Answer 6

compresses cheek

Question 7

Innervation:

cutaneous
muscular

Answer 7

cutaneous: trigeminal nerve 5
muscular: facial nerve 7

Question 8

Cn7

Answer 8

facial

type: sensory (taste), motor and visceral motor
exit: internal acoustic meatus, facial canal, stylomastoid foramen

motor- eg temporal
parasympathetic- eg branches to pterygopalatine ganglion
taste- anterior 2/3 tongue
sensory- skin over external auditory meatus

Question 9

3 salivary glands

Answer 9

parotid, submandibular, sublingual

parotid gland:

• superficial to muscles
• sits on corner of jawline
• parotid duct goes under buccinator
• opens into molar cavity at second upper molar
• facial nerve passes through parotid gland

Question 10

temporalis

Answer 10

elevation, retraction

Question 11

masseter

Answer 11

elevation

Question 12

medial pterygoid

Answer 12

elevation, side to side

Question 13

lateral pterygoid

Answer 13

protrusion and depression

Question 14

all muscles of mastication innervation

Answer 14

motor branch of V3 (trigeminal)

Question 15

cn5

Answer 15

trigeminal

type: somatic (general sensory) and somatic motor

3 divisions:
- ophthalmic, maxillary, mandibular (V123

exit through
superior orbital fissure v1
foramen rotundum v2
foramen ovale v3

ophthalmic- sensory skin, mucous membranes, front of head and nose
»> frontal, lacrimal, nasocillary

maxillary- sensory dura, nasal, upper cheek, lip, teeth
» infraorbital, zygomaticofacial, zygomaticotemporal

mandibular- sensory, lower face. lip, teeth
»>sensory- buccal, mental, lingual
»>motor- temporalis, masseter, medial
parasympathetic to salivary glands

Question 16

temporal and infratemporal fossa

Answer 16

temporal- fan shaped, located on surface of skull
- contains temporalis muscle, branches v2

infratemporal- inferor to temporal
- contains medial and lateral pterygoids, maxillary artery, v3, facial nerve branches, glossopharyngeal nerve, pterygoid plexus

Question 17

arteries to face

Answer 17

• from external carotid

lingual, facial, maxillary, superficial temporal

Question 18

venous drainage of face

Answer 18

• facial veins drains majority
• this goes into internal jugular

superficial temporal vein drains into external jugular