face & tmj Flashcards
how many bones are there in total?
22 bones
What are the 3 parts that make up the face?
calvaria, floor of the cranial cavity, viscerocranium
The muscles of the face are innervated by what nerve?
Cranial nerve 7, facial nerve
What is the action of the Orbicularis Oculi?
Palpebral part: gently shuts the eye
Orbital part: forcefully shuts the eye
What is the action of the occipitofrontalis?
Wrinkles forehead, lifts eyebrows
What is the action of the nasalis?
Transverse part: comprises the nasal aperture
Alar part: flares the nostril
What is the action of the procerus?
Draws down medial angle of eyebrow, produces horizontal wrinkles over nose
What is the action of the depressor septi?
Pull nose inferiorly
What is the action of the anguli oris?
Frown
What is the action of the depressor labii inferioris?
Draws lower lip downward and laterally, like a partial cringe
What is the action of the mentalis?
raises and protrudes lower lip
What is the action of the corrugator supercilli?
Draws eyebrows medially and downward
What is the action of the risorius?
retracts corners of the mouth
What is the action of the zygomaticus?
Major: smile
Minor: draws upper lip upward
What is the action of the orbicularis oris?
Closes lip; protrudes lip
What is the action of the buccinator?
Presses cheek against teeth. compressed distended teeth
What is the action of the platysma?
Tenses the skin of the neck and can bring corners of the mouth down
What are the muscles of mastication and their actions?
Masseter: elevates the mandible
Temporalis: elevate and retract the mandible
Lateral pterygoid: protrusion and contralaterally deviate mandible
Medial pterygoid: elevate and contralaterally deviate mandible
What is the action of the digastric muscle?
Anterior belly: opens mouth by lowering mandible
Posterior belly: pulls hyoid upward and back
What is the temporomandibular ligament precents what movement?
limit lateral displacement
What is the cranial nerve order?
OOO to touch and feel virgin girl vaina ah heaven
Olfactory, optic, oculomotor, trochlear, trigeminal, abducens, facial, vestibucochlear, glossopharyngeal, vagus, accessory, hypoglossal
Branches of the external carotid artery that innervate the face
transverse facial
superficial temporal
maxillary
lingual
facial
“two small mice love food”
Branches of the maxillary artery that innervate the face
infraorbital
buccal
mental
“I bought makeup”
What foramen does the ophthalmic nerve (V1) pass through
superior orbital fissure
What foramen does the maxillary nerve (V2) pass through
Foramen rotundum
What foramen does the mandibular nerve (V3) pass through
foramen ovale
What is bruxism?
grinding teeth
Function of the lower and upper part of TM disc?
Lower part- depression and elevation
Upper part- allows protrusion and protraction
Difference between bells palsy and a stroke?
Palsy- paralysis of the whole one side of the face
Stroke- paralysis of lower part of face
