Anatomy TMJ/muscles Flashcards Preview

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Flashcards in Anatomy TMJ/muscles Deck (29):
1

What are the basic types of movement by the TMJ

Hinge and glide

2

What type of sign or symptom may a patient who is experiencing TMJ disorder exhibit

Pain, joint sounds, limitations in movement

3

Which cranial nerve innervates all muscles of mastication

Fifth

4

What is the name of the horse-shaped bone where the muscles of the tongue and the floor of the mouth attach

Hyoid

5

The strongest and most obvious muscle of mastication

Masseter muscle

6

One of the cervical muscles that divide the neck region into anterior and posterior cervical triangles

Sternocleidomastoid

7

A joint on each side of the head that allows for movement of the mandible for speech and chewing

TMJ

8

One of the cervical muscles that lift the clavicle and scapula to shrug the shoulder

Trapezius

9

What bony parts is the TMJ made of

Glenoid fossa, articular eminence, condyloid process

10

Capsular ligament

Fibrous joint capsule encloses TMJ. Superiorly wraps around margin of temp bone articulator eminence/fossa and inferiorly mand condyle

11

Hinge action

First phase, lower compartment of joint used

12

Gliding movement

Forward/backward, involves lower/upper compartment of joint, condyle and articular disc glide forwar/downward along articular eminence, sideways movement when internal/external pterygoid muscles same side of face contact

13

Causes of TMD

Stress, clenching, trauma to jaw head neck, diseases of joint (arthritis), malocclusion

14

Major muscles of facial expression

Orbicularis oris, buccinator, mentalis, zygomatic major

15

Muscles of mastication

Temporalis, masseter, internal pterygoid, external pterygoid

16

Muscles of tongue

Intrinsic shape tongue speaking, chewing, swallowing, extrinsic: genioglossus, hyoglossus, styoglossus, palatoglossus. Work with TMJ

17

Muscles of soft palate

Palatoglossus, palatopharyngeus

18

Muscles of floor of mouth

Digastric, mylohyoid, stylohyoid, geniohyoid between mandible and hyoid bone

19

Mylohyoid muscle

Forms floor of mouth

20

Geniohyoid muscle

Draws tongue and hyoid bone forward

21

Stylohyoid muscle

Assist with swallowing

22

Temporal and masseter muscle

Raises mandible and closes jaw

23

Internal pterygoid

Closes jaw

24

External pterygoid

Depresses mandible to open jaw

25

Genioglossus

Depresses and protrudes tongue

26

Hyoglossus

Retracts and pulls down side of tongue

27

Styloglossus

Retracts tongue

28

Palatoglossus

Elevates base of tongue; depresses soft palate toward tongue

29

Palatopharyngeal muscle

Narrows faucets and helps shut off nasopharynx