Dissection 4 Flashcards
what foramen does the facial nerve emerge from the skull
stylomastoid foramen
what bone does the facial nerve travel through
petrous temporal
what is the innervation of the posterior belly of occipitofrontalis and some auricular muscles
posterior auricular nerve from the facial nerve
describe the course of the facial nerve through the parotid gland
enters on the posteromedial surface as two trunks which then form a plexus, this forms five main terminal branches
what are the terminal branches of the facial nerve
temporal zygomatic buccal marginal mandibular cervical
which nerve is at risk in surgery of the submandibular gland
mandibular branch of the facial nerve as it dips below the inferior border of the mandible
what are the branches of the ophthalmic nerve
supratrochlear supraorbital lacrimal infratrochlear external nasal
what are the branches of the maxillary nerve
infraorbital
zygomaticotemporal
zygomaticofacial
what are the branches of the mandibular nerve
auriculotemporal
buccal
mental
what is the sensory innervation of the skin of the posterior part of the head and neck
C2 and 3
greater occipital, lesser occipital and great auricular
describe the course of the facial artery
crosses the inferior border of the mandible at the anterior edge of the masseter
follows a tortuous course to the medial corner of the eye
what does the facial artery supply
upper and lower lips and the lateral side of the nose
describe the location of the transverse facial artery
originates in the parotid gland and runs along the zygomatic arch
what is the transverse facial artery a branch of
superficial temporal (supplies the lateral side of the face and scalp)
what is the blood supply of the anteromedial part of the scalp
branches of the ophthalmic (supratrochleal and supraorbital)
what is the blood supply to the posterior part of the scalp
occipital artery
describe the facial vein
posterior to the facial artery
straighter course
what is the clinical implication of the facial vein
connects to the pterygoid plexus of veins which drain to the cavernous sinus - danger triangle
what does the parotid gland secrete
serous saliva
what muscle does the parotid duct pierce
buccinators
opens into the second upper molar of the mouth
what are the two potential spaces for blood in the scalp
below the skin, dense connective tissue and aponeurosis (subaponeurotic)
below the periosteum
what is ecchymosis
bruising
what is a cephalhaematoma
collection of blood between the skull and the periosteum
what muscle opens the mouth
lateral pterygoid
what is the motor supply to the muscles of mastication
V2 (masseter, temporalis, lateral and medial pterygoid)
what does the epicranial aponeurosis attach to
temporalis facial laterally and occipitofrontalis anteriorly
what is the nerve supply to occipitalfrontalis frontal belly
temporal branch of facial nerve
what is the nerve supply to occipitalfrontalis occipital belly
posterior auricular branch of facial nerve
what muscle does orbicularis oculi merge with
occipitofrontalis
what are the three parts of orbicularis oculi
orbital
palpebral
lacrimal (attached to the lacrimal sac)
what is the nerve supply to orbicularis oculi
temporal and zygomatic branches of the facial nerve
where is the posterior part of the buccinators muscle
deep to the ramus of the mandible
merges with the superior constrictor muscle of the pharynx
what is the nerve supple to buccinator
buccal branch of facial (muscle of facial expression)
what muscle does the anterior part of buccinators merge with
orbicular oris
what are the dilator muscles of the mouth
levator labii superioris alequae nasii
zygomaticus minor and major
risorius
(facial artery and vein lies deep to them)
what is the nerve supply to the dilators of the mouth and orbicularis oris
buccal and mandibular branches of the facial nerve
what is the nerve supply to platysma
cervical branch of facial
