Skull, Face and Neck Flashcards
Surrounds the brain
neurocranium
skullcap
calvaria
suture bewtween occipital and pariatal bones
Lambdoid
What is the leading cause of facial injuries?
motor vehicle accidents
Le Fort I involves
maxillary bone
Le Fort II involves
nasal/maxillary/ still stable
Le Fort III
across orbital and zygomatic, movable face
layers of scalp
Skin CT Aponeurosis Loose connecti e Pericranium
where does the nerve and blood supply in scalp lay?
CT layer
type of CT in scalp
dense
Connects epicranius to occipitalis
aponeurosis
What layer seperates easily from 3 previous ones?
Loose CT
Which layer facilitates spread of infection?
loose CT via emnissary veins
How many layers does pericranium have?
2: epicranium and endocranium
If a scalp wound gapes, which layer has it penetrated?
aponeurosis
Hold bolus of food against cheek and prevents cheeck from falling in
Buccinator
Obicularis oculi and obicularis oris are what time of muscle
smooth muscle, sphincter
What are the two parts of the orbiularis oculi?
orbital and palpebral
What 4 muscle make a smile
zygomaticus major and minor
levator labi superious
three superficial layers of facial expression
occipitalis m.
auricular m.
platysma m.
Where does the facial nerve emerge from?
stylomastoid foramen
What branches are given off by facial nerve?
Posterior auricular
:temporal/zygomatic/buccal/marginal mandibular/ cervicle
What nerve innervates platysma?
cervicle branch of CN VII
Damage to muscles of facial expreesion if CN VII is damaged distal to stylomastoid foramen
Bells Palsy
Is there a C1 dermatome?
no
What provides sensory to face?
V1, 2, 3 and C2 and C3
Branches of V3
Mental
Buccal
Auriculotemporal
Branches of V2
Infraorbital
Zygomaticofacial
Zygomaticotemporal
Branches of V1
Supraorbital
Supratrochlear
palpebral branch of lacrimal
from anterior ethmoid
Where does Trigeminal nerve emerge from?
from brainstem at mid-pons level
Where do the NCB of the trigeminal lay?
Trigeminal ganglion
Where does the Blood supply for face and scalp come from?
External carotid and Internal carotid artery
What branches of facial blood supply comes from internal carotid
supratrochlear and Supraorbital
What branches of facial blood supply come from external carotid
FAcial artery
Superficial temporal and transverse facial
where can you feel the pulse of facial artery?
Anterior to masseter mscl
What veins feed into the retromandibular vein?
Superficial Temporal v + Maxillary v
What drains into external jugular vein?
Posterior branch of retromandibular + auricular vein
What drains into internal jugular vein?
anterior branch of retromandibular + facial vein
Facial vein communicates with what vein?
Superior opthalmic vein
Superior vein drains into ?
cavernous sinus
lymph nodes located?
deep to SCM
Function of tensor tympani m.
decreases the oscillations and dampens loud noise
What innervates the tensor typmani m.
Trigeminal nerve
Function of stapedius muscle
prevents overcontracting of the stapes. Stops really loud noises
CC: hyperacuosus
when stapedius muscle isn’t working~ innervated by CN VII
