Module 9 muscles

Question 1

Masseter - innervation

Answer 1

trigeminal nerve (CN V) mandibular division

Question 2

masseter - origin

Answer 2

Zygomatic arch

Question 3

masseter - insertion

Answer 3

angle and ramus of mandible

Question 4

masseter - actions

Answer 4

ELEVATE TMJ
may assist to PROTRACT TMJ

Question 5

masseter palpation

Answer 5

ask client to clench and relax jaw

Question 6

temporalis - innervation

Answer 6

trigeminal nerve (CN V) mandibular division

Question 7

temporalis - origin

Answer 7

temporal fossa & fascia

Question 8

temporalis - insertion

Answer 8

coronoid process and anterior edge of ramus of the mandible

Question 9

temporalis - actions

Answer 9

ELEVATE TMJ
RETRACT TMJ

Question 10

temporalis - palpation

Answer 10

Palpate approx inch above the zygomatic arch and have client clench and relax jaw to locate the insertion site, have client open mouth wide

Question 11

lateral pterygoid - innervation

Answer 11

trigeminal nerve (CN V)

Question 12

lateral pterygoid - origin

Answer 12

Superior head:
infratemporal surface and crest of greater wing of sphenoid

Inferior head:
lateral surface of lateral pterygoid plate of sphenoid

Question 13

lateral pterygoid - insertion

Answer 13

articular disc and capsule of TMJ,
neck of mandible

Question 14

lateral pterygoid - actions

Answer 14

Unilaterally:
LATERALLY DEVIATE the TMJ to the OPPOSITE side

Bilaterally:
PROTRACT the TMJ

Question 15

lateral pterygoid - palpation

Answer 15

with gloved hand: position palpating finger inside the mouth between the cheek and teeth along external surface of top teeth to back molars. press posteriorly and superiorly, have client protract or contralaterally DEVIATE the jaw

Question 16

medial pterygoid - innervation

Answer 16

trigeminal nerve (CN V)

Question 17

medial pterygoid - origin

Answer 17

medial surface of lateral pterygoid plate of sphenoid,
tuberosity of maxilla

Question 18

medial pterygoid - insertion

Answer 18

medial surface of ramus of the mandible

Question 19

medial pterygoid - actions

Answer 19

Unilaterally:
LATERALY DEVIATE the TMJ to the OPPOSITE side

Bilaterally:
ELEVATE the TMJ
PROTRACT the TMJ

Question 20

medial pterygoid - palpation

Answer 20

curl fingers around inside surface of the mandible, have client clench teeth and relax

inferior attachment can be palpated with gloved finger inside mouth - a long lower teeth to back molars and press posterolaterally

Question 21

occipitofrontalis - innervation

Answer 21

facial nerve (CN VII)

Question 22

occipitofrontalis - origin

Answer 22

Both: galea aponeurotica

Question 23

occipitofrontalis - insertion

Answer 23

frontalis: skin superior to eyebrows

occipitalis: superior nuchal line of occiput

Question 24

occipitofrontalis - actions

Answer 24

frontalis:
raise the eyebrows
wrinkle the forehead

occipitalis:
anchor and retract the galea posteriorly

Question 25

occipitofrontalis - palpation

Answer 25

supine: have client raise eyebrows
supine/prone: locate superior nuchal ine and move 1 inch superior

Question 26

platysma - innervation

Answer 26

facial (CN VII)

Question 27

platysma - origin

Answer 27

fascia covering superior part of pectoralis major

Question 28

platysma - insertion

Answer 28

base of mandible,
skin of lower part of face

Question 29

platysma - actions

Answer 29

assist to DEPRESS the TMJ
TIGHTEN the fascia of the neck
DRAW DOWN corner of the mouth

Question 30

platysma - palpation

Answer 30

ask client to just head anteriorly and protract jaw