1-29 Face and Mastication Flashcards Preview

Marrow and Movement > 1-29 Face and Mastication > Flashcards

Flashcards in 1-29 Face and Mastication Deck (58):
1

What is special about the trajectory of the maxillary artery?

50% it can pass laterally to the lateral pterygoid, and 50% of the time it can pass medially to the lateral pterygoid

2

Carcinoma of Parotid gland

Ressection of the parotid gland could cause paralysis to the side of the face since the facial nerve enters the parotid before branching

3

 branches of maxillary artery

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6

Masseter

Origin: zygoma and zygomatic arch

Insertion: angle and ramus of mandible

Innervation: v3 division of trigeminal nerve

Action: superficial head elevates  and protrude mandible, deep head elevates the mandible 

7

What are the four muscles of mastication

masseter, temporalis, lateral pterygoid, medial pterygoid

8

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9

What does the inferior alveolar nerve innervate? what can this be useful for?

- innervates mandibular teeth, you can inject lidocaine into region of inferior alveolar/lingual in infratemporal fossa and anesthetize those teeth for dental procedures

(if you get too close to lingual nerve, can anesthetize tongue too)

10

borders of infratemporal fossa

is medial to the ramus of the mandible; inferior to the inferior surface of the sphenoid bone, posterior to the maxialla and anterior to the styloid process and external auditory meatus

11

What are the three divisions of the trigeminal nerve, and what are their three branches?

- V1 Opthamalic Division --> Supraorbital branch

 

- V2 Maxillary Division --> Infraorbital branch

 

- V3 Mandibular Division --> Mental Branch

12

What are the movements of the TMJ (aka mastication)?

- elevation and depression

- protrusion and retrusion

- side to side 

13

The inferior alveolar nerve and lingual nerve are ___ nerves that branch off of ___

- sensory nerves

- mandibular nerve (branch of V3 trigeminal)

14

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15

Lingual nerve

- branch off of V3 trigeminal nerve

- innervates tongue

16

Lymph Drainage of pterygoid plexus 

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19

Lateral Pterygoid

Origin: superior head- infratemporal surface of sphenoid bone

inferior head- lateral surface of lateral pterygoid plate

Insertion: superior head- capsule and cartilage of disk of TMJ

inferior head- pterygoid fovea neck of mandible (condylar process)

Innervation: v3 division of trigeminal nerve

Action: bilaterally protrudes, unilaterally side to side movement 

20

buccal nerve branch tear -->

problems with closing mouth and moving edge of mouth

21

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22

Pterygoid Plexus 

- Vein plexus instead of maxillary vein 

- has connections to facial vein and brain (cavernous sinus)

- valveless, so it can switch direction and if you get facial/dental infeciton, it can spread to the brain (PICKING ZITS)

23

What are the 3 ligaments that prevent the TMJ from overstretching/maintains TMJ integrity

lateral, stylomandibular, sphenomandibular ligament

24

Medial Pterygoid

Origin: deep head- medial side of medial pterygoid plate

superficial head- tuberosity of maxilla and palantine bone

Insertion: angle and medial surface of mandible

Innervation: v3 division of trigeminal nerve

Action: super head elevates and protrudes, deep head elevates  

25

Inferior Alveolar Nerve

- branch off of V3

- goes through hole in mandible, innervates mandibular teeth

- eventually becomes mental nerve

26

Lymph Drainage of Lip incisors and tip of tongue

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27

Paralysis of Face of Stroke

- control of the upper part of face and lower part of face is in different places in the CNS

- stroke can cause damage that only affects innervation of upper face or lower face (can get facial drooping in upper left instead of entire left of face)

28

Temporal fossa is composed of which four bones

Temporal, parietal, sphenoid and frontal (place where these four are closest = pterion)

29

What vasculature supplies the posterior scalp/head

occipital artery and posterior auricular artery (and respective veins)

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32

A tear to the temporal nerve would affect

blinking

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35

Which nerve is the one exception of the face that carries motor and sensory nerves

V3 of trigeminal nerve

36

Lymph Drainage of Posterior Scalp and Posterior Ear

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37

Shingles on the Face

- If shingle virus infects ganglion of trigeminal nerve, it can affect a specific dermatome when reactivated

- if V1 region of trigeminal nerve affected, can get blisters on cornea and can go blind 

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40

zygomatic nerve branch tear -->

problems with blinking and lifting lip

41

mandibular nerve branch tear -->

problems depressing mouth and folding lower lip downward

42

Mumps

- there is a fascial capsule around parotid gland 

- an infection to the parotid gland confines it to that area as a result, but with mumps the stroma will swell a lot and v painful

43

What are the five branches of the facial nerve?

Temporal, Zygomatic, Buccal, Mandibular, and Cervical

44

Parotid Duct

- Drains Salivary JUICES to the mouth via the parotid papilla

- goes through the buccinator

45

Movement of TMJ when opening mouth

(1)  TMJ with mouth closed. Both superior and inferior joint spaces are minimal.

(2)With the mouth slightly opened, the movement of the head of the mandible within the TMJ occurs largely  within the inferior joint space as a hinging action.

(3)Lateral pterygoid causes mandible to go forward, hits articular eminence and forces it downard

4)With the mouth opened further, the lateral pterygoid contracts to pull the head (and disk) forward onto the articular eminence, thereby causing a gliding movement that occurs largely within the upper joint space. (upper space is expanded)

46

Name the pathway and branches of the facial artery.

Facial artery branches into inferior and superior labial artery, then continues to become angular artery as it moves up

47

What is in the Infratemporal fossa?

Medial pterygoids, lateral pterygoids, maxillary artery, inferior alveolar nerve, lingual nerve

48

lymph drainage pathway of posterior scalp

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49

What vasculature supplies the lateral scalp/face?

-superficial temporal artery (anterior and posterior branch)

- transverse facial artery

(and respective veins)

50

Temporalis

Origin: temporal fossa

Insertion: coronoid process of mandible

Innervation: motor branch of trigeminal nerve (V3)

Action: anterior fibers elevate and posterior fibers retract

51

Lymph Drainage for Anterior Scalp/Anterior Ear

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52

Which muscle keeps food in chewing position instead of spilling food all inside of mouth, also called trumpet blower's muscle?

Buccinator

53

Lymph Drainage of Anterior Face, eyelids, nose, and cheek

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55

TMJ Joint Capsule

Connective tissue covering of TMJ

56

Parotid Gland

- Largest salivary gland (not most efficient though)

- facial nerve innervates parotid before branching 

 

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58

Bell's Palsy

-  damage to facial nerve --> Inflammation of the facial nerve causes it to swell

- it gets compressed when going through stylomastoid foramen

- peripheral damage to the nerve (entire side of face)