S2-Superficial face Flashcards
what is the somatosensory innervation of the superficial face
trigeminal nerve (superficial face, forehead, oral cavity). Facial nerve (skin of outer ear, nasopharynx, taste)
what is the somatomotor innervation of the superficial face
trigeminal nerve (muscles of mastication). facial nerve (muscles of facial expression)
what supplies the sensory to superficial face and scalp
greater and lesser occipital nerve, greater auricular nerve, trigeminal nerve, facial nerve
where does the greater occipital nerve emerge and what does it innervate
dorsal rami of C2,
emerges from below sub occipital triangle;
innervates scalp on back of head
what rami does the lesser occipital nerve come from and what does it innervate
ventral rami of C2 and innervates scalp on lateral areas of head, posterior to ear
what rami does greater auricular nerve come from and what does it innervate
ventral rami of C2 and Dorsal rami of C3.
innervates skin over parotid gland and mastoid process along with surfaces of outer ear
what are the 3 branches of the trigeminal nerve
ophthalmic, maxilliary, mandibular
where does the ophthalmic nerve exit skull
through superior orbital fissure
what are the major branches of the ophthalmic nerve
frontal, lacrimal, nasociliary
what are the major branches of the frontal nerve and what do they do
supraorbital: passes through supraorbital foramen; skin of lateral forehead/anterior scalp
supratrochlear: skin of medial forehead
what are the branches of the nasociliary nerve and what do they do
infratrochlear: skin lateral to root of nose (bridge).
external nasal n (from anterior ethmoid n): skin of nasal ala, vestibule and dorsum of nose
where does the maxillary nerve exit the skull
foramen rotundum
what are the major branches of the maxillary nerve
infraorbital, zygomatic
what does the infraorbital n. pass through and what does it innervate
passes through infraorbital foramen, maxillary sinus. innervates skin of cheek, lateral nose and superior lip
what does zygomaticofacial nerve inneravte
skin on prominence of cheek
what does the zygomaticotemporal nerve innervate
anterior part of temporal fossa
where does the mandibular nerve exit the skull
foramen ovale
what are the major branches of the mandibular nerve
auriculotemporal, buccal, mental n
what does the auricotemporal nerve innervate
skin posterior 2/3 temporal region
what does the mental nerve innervate
skin of chin and inferior lip
what are all muscles of mastication innervated by
CN V3 (mandibular branch)
what are the muscles of mastication
masseter, temporalis, medial pterygoid, lateral pterygoid
what are all muscles of facial expression innervated by
CN VII (facial nerve)
what does the buccinator muscle do
compresses cheek, holds food between teeth during chewing
what does the depressor anguli oris muscle do
draws corners of mouth inferior and laterally
what does the depressor labii inferioris muscle do
draws lower lip inferiorly
what does the levator anguli oris do
draws coners of mouth superiorly and laterally
what does the levator labii superioris do
opens lips: raises and furrows the upper lip
what does the mentalis muscle do
protrudes lower lip (pout): wrinkles chin
what does the orbicularis oris muscle do
compresses and purses lips (kiss muscle)
what does the risorius muscle do
draws corner of lip laterally; tenses lip; synergist of zygmaticus
what does the zygomaticus major muscle do
elevate corner of mouth (smile muscle)
what does the zygomaticus minor muscle do
elevate corner of mouth (smile muscle)
where does the facial nerve exit
stylomastoid foramen
what are the branches of the facial nerve
posterior auricular, temporal, zygmatic, buccal, mandibular, cervical
what is the GVA function of the facial nerve
sensory innervation of nasopharynx
what does the majority of the arterial supply to the superficial face and scalp come from
external carotid arteries
what does the occipital artery supply
scalp of back of head
what is the only superficial branch of the maxillary artery
mental artery (runs with mental nerve to chin)
what branches of the internal carotid supply the superficial face and scalp
supraorbital and supratrochlear (supply muscles and skin of forehead and anterior scalp)
what is the venous drainage for the superficial face and scalp
external jugular veins
what is the largest salivary gland
parotid gland
where is the parotid gland located
anterior to ear
what does the parotid gland receive innervation from
great auricular nerve
where does parotid duct deliver saliva to oral cavity
lateral to 2nd upper molar teeth
what is the main arterial supply to the orbit and eyeball
ophthalmic artery (from internal carotid artery)
what is the general somatic efferent to the extrinsic eye msucles
occulomotor nerve, trochlear nerve, abducens nerve
what is the action of the inferior oblique muscle of the eye
moves eye superiorly (elevate eye) and lateral (abducts)
what is the action of the superior oblique muscle of the eye
moves eye inferiorly and laterally (abducts eye)
what controls the dilator pupillae muscle of the eye
sympathetics
what controls the sphincter pupillae muscle of the eye
parasympathetic control
