Face, temporal and infratemporal fossa

Question 1

What does the occipitofrontalis do?

Answer 1

-Elevates eyebrows

Question 2

What does the orbicularis oris do?

Answer 2

• Closes mouth

Question 3

What does the orbicularis oculi do?

Answer 3

• Closes eyelids

Question 4

What does the zygomaticus major do?

Answer 4

-Elevates labial commissure

Question 5

What does the platysma do?

Answer 5

• Depresses mandible agains t resistance, tenses fascia of neck

Question 6

What does the buccinator do?

Answer 6

• Compresses cheek(responsible for keeping a bolus of food inside the mouth while eating)

Question 7

What is the nerve responsible for the cutaneous innervation of the face?

Answer 7

• Cranial nerve V

Question 8

What innervates the muscles responsible for facial expression?

Answer 8

• Cranial nerve VII (facial)

Question 9

What is the type of innervation that the facial nerve provides?

Answer 9

Sensory, taste, general, motor and visceral motor

Question 10

What is the exit for the facial nerve

Answer 10

• Internal acoustic meatus
• Facial canal
• Stylomastoid foramen

Question 11

What are the motor branches of the cranial nerve vII

Answer 11

Posterior auricular, temporal, zygomatic, buccal, marginal mandibular, cervical

Question 12

What are the parasympathetic branches to pterygopalatine ganglion?

Answer 12

Taste - via chorda tympani via lingual nerve from anterior 2/3 of tongue

General sensory - skin over external auditory meatus

Question 13

Describe the location of the parotid gland

Answer 13

• Superficial to muscles
• Parotid duct leaves gland at anterior edge and passes towards the corner of the mouth but turns deep through buccinator
• Parotid duct opens into oral cavity at upper second molar tooth

Question 14

VAN that pass through the parotid gland

Answer 14

• Retromandibular vein
• External carotid artery
• Facial nerve

Question 15

Role of temporalis in mastication

Answer 15

• Elevation

- Retraction

Question 16

Role of masseter in mastication

Answer 16

• Elevation

Question 17

Role of medial pterygoid in mastication

Answer 17

• Elevation, side to side

Question 18

Role of lateral pterygoid in mastication

Answer 18

• Protrusion and depression

Question 19

What is the innervation for the mastication muscles

Answer 19

• Motor branch of V3

Question 20

Type of innervation provided by V1 ophthalmic branch of the trigeminal

Answer 20

• Sensory fibres skin, mucous membranes, conjunctiva, front of head

Question 21

Which pharyngeal arch does the trigeminal originate from

Answer 21

• The first arch

Question 22

What are the three divisions of the trigeminal

Answer 22

• Ophthalmic(sensory)
• Maxillary(sensory)
• Mandibular(mixed)

Question 23

What are the exits for the divisions of the trigeminal

Answer 23

• Superior orbital fissure
• Foramen rotundum
• Foramen ovale

Question 24

What are the branches of V1 ophthalmic

Answer 24

• Lacrimal, nasocillary, frontal

Question 25

What does the frontal nerve branch into

Answer 25

• Supraorbital

- Supratrochlear

Question 26

Where does the lacrimal head to

Answer 26

• Lacrimal head towards lacrimal gland, not just sensory by itself, also has parasymp supply from facial nerve

Question 27

What does the nasocillary divide into

Answer 27

• Anterior athmoidal, posterior ethmoidal and infratrochlea

Question 28

What is the type of innervation provided by the V2 maxillary

Answer 28

• Sensory fibres dura, nasal, upper cheek, lip, teeth

Question 29

Describe the path of the V2 maxillary

Answer 29

Exits via the foramen rotundum

Enters pterygopalatine ganglion, through inferior orbital fissure

Question 30

What does the V2 branch into

Answer 30

• Infraorbital
• Zygomaticofacial
• Zygomaticotemporal

Question 31

What does the V2 eventually give rise to?

Answer 31

• Superior alveolar nerve which supplies the upper teeth

Question 32

What is the type of innervation provided by the V3 mandibular?

Answer 32

• Mixed, sensory, lower face, lip and teeth. motor to muscles of mastication

Question 33

What are the sensory branches of the v3 mandibular

Answer 33

auriculotemporal, buccal, mental, lingual, inferior alveolar

Question 34

what are the motor branches of the v3 mandibular

Answer 34

temporalis, masseter, medial and lateral pterygoids, nerve to mylohyoid

Question 35

What type of innervation does the trigeminal provide to the salivary glands

Answer 35

• Parasympathetic

Question 36

What does the inferior alveolar eventually lead to

Answer 36

Mental nerve

Question 37

Describe the location of the temporal and appearance of the temporal fossa

Answer 37

• Fan shaped space that is located on the lateral surface of the skull

Question 38

What does the temporal fossa contain?

Answer 38

• Temporalis muscle

- Branches of V2

Question 39

Location of the infratemporal fossa with respect to the temporal fossa

Answer 39

• Infratemporal fossa is inferior to the temporal fossa

Question 40

What does the infratemporal fossa contain

Answer 40

• Medial and lateral pterygoids, maxillary artery, V3 branch, chorda tympani(a branch of facial nerve which follows the anatomical course of the lingual nerve), glossopharyngeal nerve and pterygoid plexus of veins

Question 41

Describe the arterial supply to the face

Answer 41

• arterial supply is provided from the external carotid artery

Question 42

What are the key branches of the external carotid artery

Answer 42

Lingual, facial, maxillary and superificial temporal

Question 43

Which vein drains the majority of the face

Answer 43

• Facial vein drains the majority of the face, starting near the eye

Question 44

What is the path of the facial vein

Answer 44

• The vein passes inferiorly and drains into the internal jugular vein

Question 45

Where does the superficial temporal vein drain to?

Answer 45

• External jugular vein