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