Face, temporal and infratemporal fossa Flashcards
Occipitofrontalis
Muscle of the face
- Elevates the eyebrows
Orbicularis oris
Muscle of the face
- Closes the mouth
Zygomaticus major
Muscle of the face that elevates the labial commissure
[corner of the mouth]
Orbicularis oculi
Muscle of the face that closes the eyelids.
Platysma
Muscle that depresses the mandible against resistance
- Also tenses the fascia of the neck
Buccinator
Muscle of the face
- Compresses the cheek
- Keeps bolus in the mouth
Innervation of facial expression muscles
Facial nerve [CN 7]
- General motor
Innervation of the face of the skin
Trigeminal nerve [CN 5]
Motor branches of the facial nerve [6]
[To Zanzibar, by pink motor car]
Posterior auricular
Buccal
Temporal
Zygomatic
Marginal mandibular
Cervical
Arterial supply to the face [4]
Branches of the external carotid artery:
- Lingual
- Facial
- Maxillary
- Superficial temporal
Parasympathetic branches of the facial nerve
Branches to pterygopalatine ganglion
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
Exit of facial nerve
Internal acoustic meatus—-> Facial canal—-> Stylomastoid foramen
CN 5
- Name
- Branches + their exit
Trigeminal nerve
Branches:
- Ophthalmic [V1]—-> Superior orbital fissure
- Maxillary [V2] —-> Foramen rotundum
- Mandibular [V3] —-> Foramen ovale
Venous drainage of the face
Most of the face:
- Facial vein—> internal jugular
- Starts near the eye
Superficial temporal—> External jugular