Clinical anatomy of the face Flashcards
What are the two parts of the cranium?
Neurocranium (bony covering of brain and meninges)
Viscerocranium (facial skeleton)
What is the roof of the neurocranium called?
Calvaria
What is the floor of the neurocranium called?
Cranial base
What 8 bones make up the neurocranium?
Frontal
Ethmoid
Sphenoid
Occipital
Temporal
Parietal
What does pneumatised mean?
Air in the bones
What bones are pneumatised?
Temporal
Sphenoid
Ethmoid
Maxillary bones
What is the coronal suture?
The coronal suture is a dense, fibrous connective tissue joint that separates the two parietal bones from the frontal bone of the skull.
What can injury to the pterion result in?
Extra Dural haemorrhage
What are the 3 branches from CNV?
Ophthalmic nerve
Maxillary nerve
Mandibular nerve
What does the ophthalmic nerve supply?
Forehead and scalp
Frontal and ethmoidal sinus
Upper eyelid
Cornea
Dorsum of the nose
What does the maxillary nerve supply?
Lower eyelid
Cheeks and maxillary sinus
Nasal cavity and lateral nose
Upper lip
Upper teeth
Superior palate
What does the mandibular nerve supply?
Mucous membranes and floor of oral cavity
External ear
Anterior 2-3 of tongue
Lower lip
Chin
Lower teeth
What is the motor supply of the mandibular division of the trigeminal nerve?
Muscles of mastication
Suprahyoid muscles
Tensor muscles
What is Varicella Zoster Virus?
Infection which causes chicken pox and can cause lung or airway disease
What are the muscles of mastication?
Masseter
Lateral Pterygoid
Medial Pterygoid
Temporalis
Where does the masseter attach from and where to?
Zygomatic arch to the mandible
Where does the temporalis attach from and where to?
Frontal parietal bones to the coronoid process of the mandible
What muscle of mastication opens the mouth?
Lateral pterygoid
How many muscles are in the face?
43
What nerve is facial muscles supplied by?
Facial nerve VII
What is the facial muscle which is involved in pursing of lips?
Orbicularis Oris
What is the function of the buccinator?
Keeps food in oral cavity
What are the two parts of the orbicularis oculi?
Orbital Part
Palpebral Part
What muscles are used at the ear?
Auricular muscles
What does vestigial mean?
Not as important
Where would you find the parotid duct?
Opposite upper second molar tooth
What 3 major structures pass through the parotid gland?
External carotid artery
Retromandibular vein
Facial nerve
What is a parotidectomy?
Removal of parotid gland
How is bells palsy diagnosed?
If there is no specific cause
What treatment is given to people with Bells palsy?
Prednisolone
Acyclovir
What are the 5 main branches of the facial nerve?
Temporal
Zygomatic
Buccal
Marginal mandibular
Cervical
What is the platysma innervated by and its function?
Tense neck
Cervical branch of facial nerve
What is Hypoglossal-facial anastomosis?
Bringing facial nerve and hypoglossal nerve together to restore facial function
What facial pathology is named after sir Charles bell?
Bell’s Palsy
What is Bell’s palsy?
Idiopathic condition, relating to inflammation of the stylomastoid foreman
What is the nerve supply of the temporalis?
Mandibular division of trigeminal
What is the nerve supply to the buccinator?
Buccal branch of the trigeminal nerve
How would you clinically test the integrity of this muscle?
Puff out cheeks against closed mouth
What common medical condition effects the buccinator?
Stroke, causes patient to be unable to keep food in oral cavity and drool
What gland can be found anterior to the main parotid gland along the line of the parotid duct?
Accessory parotid gland (occurs in 20%)
Name three structures which pass through the parotid gland
Facial nerve
Retromandibular vein
External carotid artery
What pathologies may effect the parotid gland?
Mumps, parotid tumour
May cause facial muscle weakness or paralysis
Where is the orbicularis oculi found?
Around the eye
What are the two components of the orbicularis oculi?
Palpebral part
Orbital part
What is the function of the palpebral part of the orbicularis oculi?
For soft closure of the eyelids
What is the function of the orbital part of the orbicularis oculi?
Stronger closure of the eye such as scrunching
What is the nerve supply to the orbicularis oculi?
Temporal and zygomatic branches of the facial nerve
What would happen if the nerve supply to the orbicularis oculi was damaged?
Corneal drying
Irritation
Corneal ulceration
What are the masseter’s attachments?
Zygomatic arch and mandible
What nerve supplies the masseter?
Mandibular division of trigeminal nerve
Where does the facial nerve exit the skull from?
Stylomastoid foreman
What bone in the base of the skull does the facial nerve pass through?
Petrous temporal bone
What is the treatment for bell’s palsy?
Acyclovir and prednisolone