Anatomy of the Face & Parotid Region - Herring Flashcards
5 layers of the scalp
Skin
Connective tissue
Aponeurosis
Loose CT
Periosteum (pericranium)
contains numerous hair follicles and sweat glands
abundant arterial supply and venous drainage
Skin
dense, thick subcutaneous layer
highly vascular and well innervated by cutaneous
nerves
Connective Tissue
sheet of connective tissue between the frontal
and occipital muscle bellies of the occipitofrontalis muscle
fused posteriorly with the periosteum, anchored
laterally with temporal fascia, and not attached to
bone anteriorly
Aponeurosis (epicranial aponeurosis / galea aponeurosis)
layer of areolar tissue which allows the epicranial aponeurosis to move
potential space in which the spread of blood or infection may occur primarily anteriorly over forehead
Loose connective tissue
outer fibrous layer of skull which serves as an attachment for muscles of facial expression
Periosteum (pericranium)
Paired arteries and veins course within the ________
layer between the skin and the aponeurosis
connective tissue
The vasculature of the scalp is firmly anchored to the connective tissue and
have limited ability to _______
constrict
The vasculature of the scalp is supplied primarily from branches of the external carotid artery and internal jugular vein: what are the 3 arteries/veins?
Occipital A & V
Posterior auricular A & V
Superficial temporal A & V
The anterior scalp is supplied by branches of
the internal carotid artery & veins to cavernous sinus: which artery/vein?
Supra-orbital A & V
What veins connect the scalp veins with the dural venous sinuses creating a potential pathway of scalp infection spread into meninges
Emissary veins
The anterior scalp is supplied by which CN
CN V1
What 2 nerves that branch from the facial nerve innervate the anterior scalp
supra-orbital nerve
supratrochlear nerve
The lateral scalp is supplied/innervated by what 2 CNs
CN V2 and CN V3
The posterior scalp is mainly supplied by __________ nerve (dorsal ramus
of C2)
greater occipital N
The posterior scalp is supplied/innervated more inferiorly by _________ of upper cervical spinal nerve
dorsal rami
The posterior scalp is innervated/supplied in the posterolateral portion by the ___________ (from the cervical plexus)
lesser occipital nerve
what lobes are involved in facial recognition
temporal lobe and occipital lobe
The __________ of the temporal lobe is only active when the person looks at faces
fusiform gyrus
What 3 things are involved in the processing of facial expressions
Temporal lobe (superior temporal gyrus)
frontal lobe
amygdala
All facial expression muscles are innervated by branches of
CN VII
Muscles of facial expression can be separated into groups according to where the muscles insert into what 4 places:
Scalp muscles
Periorbital
Nasal muscles
Perioral muscles
The occipitofrontalis has 2 bellies, what are they
occipital belly
frontal belly
What common tendon do the occipital and frontal bellies share
epicranial aponeurosis
Which belly arises from the occipital bone, inserts into epicranial aponeurosis, and retracts scalp
Occipital belly (occipitalis muscle)
Which belly arises from epicranial aponeurosis, inserts into skin and subcutaneous tissue of
eyebrows & forehead, and raises eyebrows & wrinkles forehead (horizontal wrinkles)
frontal belly (frontalis muscle)
what muscle closes the eyelids
orbicularis oculi
what muscle draws the eyebrow medially and inferiorly; creates vertical wrinkles
corrugator supercilii
What muscle depresses medial ends of eyebrows; creates horizontal wrinkle(s) between eyebrow
procerus muscle
What muscle flares nostrils
nasalis
What muscle closes mouth (sphincter), compresses the lips against the teeth, & protrudes the lips
Orbicularis oris
What muscle dilates mouth and elevates angle of the mouth (true smiling)
Zygomaticus major
What muscle dilates mouth and elevates the angle of the mouth
Levator anguli oris
What muscle pulls angles of mouth inferiorly
Depressor anguli oris
What muscle presses cheek against teeth (keeps food between occlusal surfaces of teeth)
Buccinator
What muscle is important in muscles in infants to maintain suckling during feeding
Buccinator
What muscle retracts (elevates) upper lip only and dilates mouth
Levator labii superioris
What muscle dilates mouth & raises upper lip only
zygomaticus major
What muscle depresses lower lip only
depressor labii inferioris
What muscle elevates and protrudes lower lip (pouting) and assists orbicularis oris in clearing food from mandibular labial vestibule
Mentalis
What muscle can become hypertrophied due to malocclusions
Mentalis
What muscle tenses skin over neck and lower face and assists with depression of the mandible against resistance
Platysma