Face, temporal and infratemporal fossa

Question 1

Occipitofrontalis

Answer 1

Muscle of the face

- Elevates the eyebrows

Question 2

Orbicularis oris

Answer 2

Muscle of the face

- Closes the mouth

Question 3

Zygomaticus major

Answer 3

Muscle of the face that elevates the labial commissure

[corner of the mouth]

Question 4

Orbicularis oculi

Answer 4

Muscle of the face that closes the eyelids.

Question 5

Platysma

Answer 5

Muscle that depresses the mandible against resistance

• Also tenses the fascia of the neck

Question 6

Buccinator

Answer 6

Muscle of the face

• Compresses the cheek
• Keeps bolus in the mouth

Question 7

Innervation of facial expression muscles

Answer 7

Facial nerve [CN 7]

- General motor

Question 8

Innervation of the face of the skin

Answer 8

Trigeminal nerve [CN 5]

Question 9

Motor branches of the facial nerve [6]

[To Zanzibar, by pink motor car]

Answer 9

Posterior auricular

Buccal

Temporal

Zygomatic

Marginal mandibular

Cervical

Question 10

Arterial supply to the face [4]

Answer 10

Branches of the external carotid artery:

• Lingual
• Facial
• Maxillary
• Superficial temporal

Question 11

Parasympathetic branches of the facial nerve

Answer 11

Branches to pterygopalatine ganglion

Question 12

Sensory innervation of CN 7

• Special
• General

Answer 12

Special afferent—> Taste [Anterior 2/3 of tongue]

• Chorda tympani
• Lingual nerve carries chorda tympani fibres

General sensory
- Skin over external auditory meatus

Question 13

Exit of facial nerve

Answer 13

Internal acoustic meatus—-> Facial canal—-> Stylomastoid foramen

Question 14

CN 5

• Name
• Branches + their exit

Answer 14

Trigeminal nerve

Branches:
- Ophthalmic [V1]—-> Superior orbital fissure

• Maxillary [V2] —-> Foramen rotundum
• Mandibular [V3] —-> Foramen ovale

Question 15

Venous drainage of the face

Answer 15

Most of the face:

• Facial vein—> internal jugular
• Starts near the eye

Superficial temporal—> External jugular

Question 16

Muscles of mastication + their innervation

Tara and Mara Massaged Lana

Answer 16

Temporalis

Masseter

Medial pterygoid

Lateral pterygoid

All innervated by Mandibular nerve [ CN V3 ]

Question 17

Temporalis

• Innervation
• Action

Answer 17

Muscle of mastication, supplied by mandibular nerve

Action:
- Elevation and retraction

Question 18

Masseter

• Innervation
• Action

Answer 18

Muscle of mastication, supplied by mandibular nerve

Action:
- Elevation

Question 19

Medial pterygoid

• Innervation
• Action

Answer 19

Muscle of mastication, supplied by mandibular nerve

Action:

• Elevation
• Side to side

Question 20

Lateral pterygoid

• Innervation
• Action

Answer 20

Muscle of mastication, supplied by mandibular nerve

Action:

• Protrusion
• Depression

Question 21

Temporal fossa

• Shape
• Contents

Answer 21

Fan shaped fossa at the side of the head [temporal bone]

Contents:

• Temporalis muscle [mastication]
• Maxillary nerve branches [CN V2]

Question 22

Infra temporal fossa

- Contents [6]

Answer 22

Inferior to the temporal fossa

Medial and lateral pterygoid muscles

Mandibular nerve

Maxillary artery

Facial nerve branches

Glossopharyngeal nerve

Pterygoid plexus of veins

Question 23

Vessels that run through the parotid gland

Answer 23

Retromandibular vein

External carotid artery

Question 24

Path of the parotid duct

Answer 24

Leaves the gland at the anterior edge—->

Corner of the mouth —->

Buccinator—->

Enters oral cavity at the upper second molar tooth.

Question 25

Ophthalmic nerve | - Type + innervation [5]

Answer 25

V1 branch of trigeminal nerve SENSORY innervation - Skin - Conjunctiva - Front of the head - Nose - Mucous membrane

Question 26

Parotid gland

Answer 26

Superficial to the muscles of the face Largest of the three salivary glands in the head Role - Aids digestion by secreting saliva.

Question 27

Branches of the ophthalmic nerve [3 main]

Answer 27

Frontal- Supraorbital + supratrochlear Lacrimal---> rides with facial nerve to lacrimal gland [parasympathetic] Nasocillary - Anterior and posterior ethmoidal - Infra-trochlear

Question 28

Branches of the Maxillary nerve [2 main]

Answer 28

Infraorbital Zygomatic - Zygomaticofacial - Zygomaticotemporal

Question 29

Sensory branches of the mandibular nerve [4]

Answer 29

Auriculotemporal Buccal Lingual----> [Facial nerve to tongue] Inferior alveolar

Question 30

Motor branches of the mandibular nerve [5]

Answer 30

Name after muscles supplied: - Mylohyoid - Medial and lateral pterygoid - Temporalis - Masseter

Question 31

Parasympathetic branches of the mandibular nerve [5]

Answer 31

Supplies salivary glands

Question 32

Maxillary nerve - Type - Innervation

Answer 32

Sensory nerve - Dura - Nasal - Upper cheek - Lip - Teeth Parasympathetic - Enters pterygopalatine ganglion to give off fibres.

Question 33

Mandibular nerve - Type - Innervation

Answer 33

Type: mixed nerve Motor - Muscles of mastication Sensory - Lower face - Lip - Teeth Parasympathetic - Salivary glands