Face and scalp

Question 1

Tempromandibular Joint

Answer 1

• does depression, retractionm, elevation and protrusion
• has some fibrocartilate that allows it to sorta dislocate
• atypical synovial joint
• modified hinge/condylar
• articular surfaces: condyle of manidble; anterior articular tubercle of teporal bone; mandibular fossa

Question 2

protrusion of TMJ

Answer 2

lateral pterygoid assited by medial pterygoid

Question 3

Retraction of TMJ

Answer 3

-posterior fibers of Temporalis, deep part of masseter, and geniohyoid and digastric

Question 4

Elevation of TMJ

Answer 4

-temporalis, masseter, medial pterygoid

Question 5

Depressiion of TMJ

Answer 5

• gravity

- digastric, geniohyoid, and mylohyoid

Question 6

Branches of V3

Answer 6

•Mandibular nerve
-nerve to temporalis, auriculo-temporal nerve, parotid branch, nerve to myloyoid, lingual nerve, inferior alveolar nerve, mental nerve, buccal nerve to gingiva, nerves to pterygoids, nerves to masseter

Question 7

Muscles of Mastication

Answer 7

Temporalis, Masseter, Lateral pterigoid, Medial pterigoid–>invervated by V3 (madibular branch of trigeminal CN V)

Question 8

Temporalis

Answer 8

• originates in temporal fossa, inserts on oronoid porcess

- elevates and retracts mandible

Question 9

Masseter

Answer 9

-originates on zygomatic arch, inserts on angle of madible
-mostly elevates, also retracts mandible
(pound for pound strongest muscle in body)

Question 10

Medial Pterygoid

Answer 10

elevates, protracts & laterally displaces TMJ

Question 11

Lateral Pterygoid

Answer 11

depresses, protracts TMJ

Question 12

A Bunch of embryology shit

Answer 12

go make the fucking cards you lazy bastard

Question 13

Muscles fo facial expression

Answer 13

• innervated by CN VII
• occipito-frontalis; levator palebrae superioris (upper eyelid), levator labii sueriorisalaeque nasi, orbicularis oculi (below orbit), compressor naris, depressor labii inferioris, (masseter), mentalis (chin), orbicularis oris (aroudn your lips), depressor anguli oris (frown muscle), risorius (towards the back of the mandible), zygomasticus minor (on top obvi), zygomaticus major

Question 14

Cutaneous innervation of head

Answer 14

• V1-forehead, nasal cavity
• v2-cheek upper lip teeth, nasal cavity
• v3-chin tounge
• great auricular n and lesser ocipital nerve (from cervical plexus) behind ear
• C4 and lower occipital nerve-dorsal rami from cervical spinal nerves, dower neck
• greater occipital nerve-back of head to vertex starting around line of ears, also dorsal rami

Question 15

Cavernous sinus

Answer 15

• contents include: CNs III, IV, V1, V2, VI, int carotid artery
• gets venous drainage from inf/upr opthalmic veins, angular v, facial v, deep facial v, indirect from pterygoid venous plexus

Question 16

Scalp Layers

Answer 16

Skin
Connective tissue
Aponeurosis
Loose Areolar tissue
Pericranium

Question 17

Occipitofrontalis (epicranius)

Answer 17

• 4 bellies, two occipitial, two frontal connnected by aponeurosis
• occipital bellies smaller and arise from highest nuchal line
• frontal bellies are larger and closer to mdiline, arise from skin and superficial fascia of eyebrow

Question 18

Stablity of TMJ

Answer 18

• most stable when closed
• forward movement prevented by anterior articular eminence and posterior fibres of temporalis
• backward movement lateral log and contratcion of lateral pterygoid
• forward dilocation prevented by articular eminence, tension of lateral lig, and contraction of medial pterygoid and massester (open jawed)