Face, temporal and infratemporal fossa Flashcards Preview

202: Theme 2, Sensory inputs and motor outputs > Face, temporal and infratemporal fossa > Flashcards

Flashcards in Face, temporal and infratemporal fossa Deck (33)
1

Occipitofrontalis

Muscle of the face
- Elevates the eyebrows

2

Orbicularis oris

Muscle of the face
- Closes the mouth

3

Zygomaticus major

Muscle of the face that elevates the labial commissure
[corner of the mouth]

4

Orbicularis oculi

Muscle of the face that closes the eyelids.

5

Platysma

Muscle that depresses the mandible against resistance

- Also tenses the fascia of the neck

6

Buccinator

Muscle of the face
- Compresses the cheek
- Keeps bolus in the mouth

7

Innervation of facial expression muscles

Facial nerve [CN 7]
- General motor

8

Innervation of the face of the skin

Trigeminal nerve [CN 5]

9

Motor branches of the facial nerve [6]
[To Zanzibar, by pink motor car]

Posterior auricular

Buccal

Temporal

Zygomatic

Marginal mandibular

Cervical

10

Arterial supply to the face [4]

Branches of the external carotid artery:
- Lingual
- Facial
- Maxillary
- Superficial temporal

11

Parasympathetic branches of the facial nerve

Branches to pterygopalatine ganglion

12

Sensory innervation of CN 7
- Special
- General

Special afferent---> Taste [Anterior 2/3 of tongue]
- Chorda tympani
- Lingual nerve carries chorda tympani fibres

General sensory
- Skin over external auditory meatus

13

Exit of facial nerve

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

14

CN 5
- Name
- Branches + their exit

Trigeminal nerve

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

- Maxillary [V2] ----> Foramen rotundum

- Mandibular [V3] ----> Foramen ovale

15

Venous drainage of the face

Most of the face:
- Facial vein---> internal jugular
- Starts near the eye

Superficial temporal---> External jugular

16

Muscles of mastication + their innervation

Tara and Mara Massaged Lana

Temporalis

Masseter

Medial pterygoid

Lateral pterygoid

All innervated by Mandibular nerve [ CN V3 ]

17

Temporalis
- Innervation
- Action

Muscle of mastication, supplied by mandibular nerve

Action:
- Elevation and retraction

18

Masseter
- Innervation
- Action

Muscle of mastication, supplied by mandibular nerve

Action:
- Elevation

19

Medial pterygoid
- Innervation
- Action

Muscle of mastication, supplied by mandibular nerve

Action:
- Elevation
- Side to side

20

Lateral pterygoid
- Innervation
- Action

Muscle of mastication, supplied by mandibular nerve

Action:
- Protrusion
- Depression

21

Temporal fossa
- Shape
- Contents

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

Contents:
- Temporalis muscle [mastication]
- Maxillary nerve branches [CN V2]

22

Infra temporal fossa
- Contents [6]

Inferior to the temporal fossa

Medial and lateral pterygoid muscles

Mandibular nerve

Maxillary artery

Facial nerve branches

Glossopharyngeal nerve

Pterygoid plexus of veins

23

Vessels that run through the parotid gland

Retromandibular vein

External carotid artery

24

Path of the parotid duct

Leaves the gland at the anterior edge---->

Corner of the mouth ---->

Buccinator---->

Enters oral cavity at the upper second molar tooth.

25

Ophthalmic nerve
- Type + innervation [5]

V1 branch of trigeminal nerve

SENSORY innervation
- Skin
- Conjunctiva
- Front of the head
- Nose
- Mucous membrane

26

Parotid gland

Superficial to the muscles of the face

Largest of the three salivary glands in the head

Role
- Aids digestion by secreting saliva.

27

Branches of the ophthalmic nerve [3 main]

Frontal- Supraorbital + supratrochlear

Lacrimal---> rides with facial nerve to lacrimal gland [parasympathetic]

Nasocillary
- Anterior and posterior ethmoidal
- Infra-trochlear

28

Branches of the Maxillary nerve [2 main]

Infraorbital

Zygomatic
- Zygomaticofacial
- Zygomaticotemporal

29

Sensory branches of the mandibular nerve [4]

Auriculotemporal

Buccal

Lingual----> [Facial nerve to tongue]

Inferior alveolar

30

Motor branches of the mandibular nerve [5]

Name after muscles supplied:

- Mylohyoid
- Medial and lateral pterygoid
- Temporalis
- Masseter

31

Parasympathetic branches of the mandibular nerve [5]

Supplies salivary glands

32

Maxillary nerve
- Type
- Innervation

Sensory nerve
- Dura
- Nasal
- Upper cheek
- Lip
- Teeth

Parasympathetic
- Enters pterygopalatine ganglion to give off fibres.

33

Mandibular nerve
- Type
- Innervation

Type: mixed nerve

Motor
- Muscles of mastication

Sensory
- Lower face
- Lip
- Teeth

Parasympathetic
- Salivary glands