Muscles Of Facial Expression Flashcards
How are wrinkles formed
From at 90* angle to muscle fibres direction
What is noticeable about a buccal fat check pad in children and ppl who are malnourished
Children - more prominent and imp as helps prevent cheeks collapse when sucking
Malnourished - wouldn’t have it
What is the vermillion border
Line around the lips
Transitional zone
What are some muscles of facial expression
Frontalis Orbicularis (oculi) or (oris) Quadratus superioris Depressors of the lips Buccinator Platysma
What is the quadratus superioris
A group of 4 muscles
Zygomaticus major and minor - attach to zygoma
Levator labii superioris - elevate superior lip
Levator labii superioris eleaque Nasi - elevate lip, wing of nose, flare nostrils
Depressor anguli oris - up from mandible to angle of the mouth, depresses angle of mouth
Levator anguli oris - elevate angle of mouth (deeper)
Depressor labii inferiors - depress lower lip
Mentalis - mental region muscle cover over pouted lip
What is the area where a lot of muscles of facile expression converge
Modiolus
Fibrous tissue ball
What is the Buccinator
Big muscle of the cheek gets pierced by parotid gland at approx upper 2nd molar
What is the pterygomandibular raphe
Attachment point of Buccinator a thickened fascia
Describe the orbicularis oculi
Divide into 2
Orbital outside external part
Palpebral inside internal eyelid
Whole muscle helps eye close
What sit he epicranial aponeurosis
Flattened tendon
Extends form frontal pis and joins to occipitalis
Move in tandem with eachother
What are the 5 layers of the scalp
Skin
Connective tissue highly vascularised
Aponeurosis
Loose connective tissue a lot of movement sca move over it
Periosteum very thin layer that is tightly attached to the bone
What innervates the Muscles of facial expression
Cranial nerve 7 facial nerve
Only innervates these muscles
To clinically test ask pt to frown close eye ps smile etc
How dos the facial nerve exit the cranial cavity
Between the junction of the pons and medulla
Close proximity to vertebral arteries
Leaves through the internal acoustic meatus
Exit via stylomastoid foramen
Where does the facial nerve branch and what are the branches
Branches immediately when it comes out of the stylomastoid foramen to a posterior auricular branch then goes to the parotid gland
Goes between superficial and deep layers and forms a plexus and has 5 terminal branches
Temporal
Zygomatic
Buccal
Mandible
Cervical
What is Bell’s palsy and how does it occur
When right side of face droops and has loss of movement
Viral infection of the facial nerve
Just has some corticosteroids
