Cranial nerve and facial expression Flashcards
layers of the scalp
skin, connective tissue, aponeurosis, loose connective tissue, pericranium
contents of the temporal fossa
upper portion on temporalis and superficial artery and vein
motions of the TMJ joint
depression, elevation
protrusion and retrusion
side to side excursion
contents of infratemporal fossa
lower portion of temporalis
lateral and medial pterygoid
maxillary artery
pterygoid venous plexus
mandibular division of CN V and chorda tympani
otic ganglion
contents of the pterygopalatine fossa
pterygopalatine ganglion
pterygopalatine part of maxillary a.
terminal branches of CN 7
temporal, zygomatic, buccal, mandibular, cervical, posterior auricular
functions of CN 7
somatic motor, visceral motor (parasympathetic), somatic sensation to the external ear, visceral sensation- taste of 2/3 anterior tongue
injury of CN 7 before crossing the acoustic meatus
peripheral motor facial paralysis, hearing loss and dizziness
injury of CN 7 after the geniculate ganglion but before tympanic cavity
peripheral motor paralysis, disturbances in taste, lacrimation and salivation
injury of CN 7 before crossing the tympanic cavity
motor paralysis, disturbances in salivation and taste
injury of CN 7 in or after crossing the tympanic membrane
peripheral motor paralysis, disturbances of taste and salivation
injury of CN 7 after leaving the stylomastoid foramen
facial paralysis
divisions of trigeminal nerve
V1: opthalmic nerve- somatic/ chemical sensation (gas)
V2: Maxillary nerve- somatic/ chemical sensation (smell)
V3: Mandibular nerve- somatic motor and sensation, sensory- mental nerve (taste) motor- muscles for mastication, hearing, swallowing
terminal branches of the trigeminal nerve divisions
V1: opthalmic n. terminal branch- supraorbital n.
V2: maxillary n. terminal branch- infraorbital
V3: mandibular n. terminal branch- mental n.
what 3 cranial nerves is the trigeminal nerve a shuttle for
CN 3: ciliary ganglion
CN 7: facial n.- pterygopalatine ganglion (zygomatic n. of V2 and lacrimal of V1) and submandibular ganglion (lingual n. of V3)
CN 9: otic ganglion (auriculotemporal n. of V3)
branches from the external carotid a.
(lary’s friend always always makes spaghetti)
lingual, facial, ascending pharyngeal, ascending palatine, maxillary, superficial temporal
branches from the maxillary a.
middle meningeal, inferior alveolar, greater and lesser palatine, sphenopalatine, deep temporal
what is the deep facial muscleq
buccinator
functions of the buccinator
holds food in mouth and forcefully blow air out
orbicularis oculi functions
closes eyelids
orbital part: wink tightly
palpebral part: blink reflex
zygomaticus major funtion
smile expression
mastication muscles
medial pterygoid
lateral pterygoid
temporalis
masseter
medial pterygoid innervation and function and attachment
attachment: inside of mandibular angle
innervation: CN 5
function: elevate and protract mandible
lateral pterygoid innervation, function, and attachment
attachement: mandibular condyle
innervation: CN 5
function: initiate mandibular motion, protract mandible
temporalis innervation, function, and attachment
attachment: coronoid process
innervation: CN 5- deep temporal branch
function: elevate and retract mandible
masseter innervation, function, and attachment
attachment: outside of mandibular angle
innervation: CN 5
function: elevate and protract mandible
damage above lower motor nuclei in ONE hemisphere, paralysis of contralateral face- scalp spared
upper motor neuron injury
damage in or below lower motor motor nuclei, paralysis of both ipsilateral face and scalp
lower motor neuron injury
