Chapter 4 Anatomy Muscles

Front 1

Each Muscle has how many ends?

Back 1

2

Front 2

What are the 2 ends of a muscle?

Back 2

Origin

Insertion

Front 3

Where does muscles receive blood from where?

Back 3

Nearby Arteries

Front 4

Muscles are divided into how many groups?

Back 4

6

Front 5

What are the 3 groups of muscles we need to know

Back 5

Cervical

Muscles of facial expressions

Muscles of Mastication

Front 6

CERVICAL MUSCLES

Back 6

........

Front 7

What are the 2 cervical muscles?

Back 7

Sternocleidomastoid (SCM)

Trapezius

Front 8

Cervical muscles are what?

Back 8

Superficial

Can be palpated

Front 9

The Sternocleidomastoid is what?

Back 9

The largest and most superficial

Front 10

The Sternocleidomastoid muscles divides what?

Back 10

neck into anterior and posterior cervical triangles

Front 11

What is the Sternocleidomastoid muscles origin?

Back 11

Medial part of clavicle and

the sternum's superior and lateral surfaces

Front 12

What is the Sternocleidomastoid Insertion?

Back 12

Just posterior and inferior to external acoustic meatus of each ear

Front 13

What is the action of one pair of the Sternocleidomastoid muscle?

Back 13

The head and neck bend to the ipsilateral side

Front 14

If both pairs of the Sternocleidomastoid muscle contracts what happens?

Back 14

The head will flex at the neck and extend at the junction between the neck and skull

Front 15

Trapezius is what?

Back 15

Superficial to both lateral and posterior surfaces of the neck

Front 16

What is he Origin of the Trapezius muscle?

Back 16

External surface of the occipital bone and the

posterior midline of the cervical and thoracic regions

Front 17

What is the insertion of the Trapezius muscle?

Back 17

Lateral third of the clavicle and parts of the Scapula

Front 18

What is the action of the Trapezius muscle?

Back 18

When shoulders are shrugged

Front 19

MUSCLES OF THE FACIAL EXPRESSIONS

Back 19

..................

Front 20

Muscles of the facial expressions are what?

Back 20

Paired muscles

Front 21

All muscles of the facial expression originate from where?

Back 21

surface of the skull bone

Front 22

All muscles of the facial expressions insert where?

Back 22

Of the Dermis of the Skin

Front 23

When the muscles of the facial expression contracts what does it do to the skin?

Back 23

Skin moves causing wrinkles

Front 24

All muscles of the facial expression are innervated by the what?

Back 24

Seventh cranial or facial nerve

Front 25

Epricanial has how many bellies?

Back 25

2

Front 26

What are the Epricanial muscles bellies?

Back 26

Frontal

Occipital

Front 27

What is the origin for the frontal belly?

Back 27

Epicranial aponeurosis

Front 28

What is the origin of the occiptal belly

Back 28

Occipital and temporal bone

Front 29

What is the insertion for the frontal belly?

Back 29

Eyebrow and root of nose

Front 30

What is the insertion for the occipital belly?

Back 30

Epicranial aponeurosis

Front 31

What is the action of the Epicranial muscle?

Back 31

Raise eyebrows and scalp

Front 32

ORBICULARIS OCULI

Back 32

.........

Front 33

What is the Origin of the ORBICULARIS OCULI?

Back 33

Oribital rim

frontal bone

maxilla

Front 34

What is the insertion of the Orbicularis Oculi

Back 34

Lateral canthus area

Some encircle eye

Front 35

What is the action for the Orbicularis Oculi?

Back 35

Close eyelids

Front 36

CORRUGATOR SUPERCILII

Back 36

..................

Front 37

What is the Origin of the Corrugator Supercilii

Back 37

Frontal Bone

Front 38

What is the insertion for Corrugator Supercilii?

Back 38

Skin of the eyebrow

Front 39

What is the action for Corrugator Supercilii

Back 39

Draws skin medially and inferiorly toward the nose, "Frowning"

Front 40

ORBICULARIS ORIS

Back 40

.........

Front 41

What is the Origin of the Orbicularis Oris?

Back 41

Encircles mouth

Front 42

What is the Insertion of the Orbicularis Oris?

Back 42

Labial commisure

Front 43

What is the action for the Orbicularis Oris?

Back 43

Close lips,

Pursing lips

Grimacing

Pouting

kissing

Front 44

The Buccinator muscle has what Origin?

Back 44

Maxilla

Mandible and

Pterygomandibular raphe

Front 45

What is the insertion for Buccinator?

Back 45

Labial Commissure

Front 46

What is the Action for the Buccinator?

Back 46

Compresses Cheek

Front 47

Risorius has what Origin?

Back 47

Fascia superficial to masseter muscle

Front 48

What is the Insertion for the Risorius?

Back 48

Labial Commisure

Front 49

What is the action for the Risorius?

Back 49

Stretch lips and widen the mouth

Grin or Fake smile

Front 50

What is the Origin of the Levator Labii Superioris?

Back 50

Maxilla

Front 51

What is the insertion for the Levator Labii Superioris?

Back 51

Upper Lip

Front 52

What is the action for the Levator Labii Superioris?

Back 52

Elevates upper lip

Front 53

What is the Origin of the Levator Labii Superioris Alaeque Nasi?

Back 53

Maxilla

Front 54

What is the insertion of the Levator Labii Superioris

Back 54

Ala of nose and upper lip

Front 55

What is the action of the Levator Labii Superioris Alaeque

Back 55

Elevates the upper lip and ala of nose,

(sneering expression)

Front 56

Zygomaticus Major has what Origin?

Back 56

Zygomatic bone

Front 57

What is the insertion of the Zygomaticus Major?

Back 57

Labial Commissure

Front 58

What is the action for the Zygomaticus Major?

Back 58

Elevates labial commissures of upper lip and pulls laterally "smile"

Front 59

ZYGOMATICUS MINOR

Back 59

..........

Front 60

What is the Origin of the Zygomatic minor?

Back 60

Zygomatic Bone

Front 61

What is the insertion of the Zygomaticus Minor?

Back 61

Upper Lip

Front 62

What is the action of the Zygomaticus Minor?

Back 62

Elevates upper lip assisting in smiling

Front 63

LEVATOR ANGULI ORIS

Back 63

..........

Front 64

What is the Origin of the Levator Anguli Oris?

Back 64

Maxilla

Front 65

What is the insertion for the Levator Anguli Oris?

Back 65

Labial Commissure

Front 66

What is the action for the Levator Anguli Oris?

Back 66

Elevates labial commsissure "smile"

Front 67

ANGULI ORIS

Back 67

.............

Front 68

What is the Origin of the Depressor Anguli Oris?

Back 68

Mandible

Front 69

What is the insertion for the Depressor Anguli Oris?

Back 69

Labial Commissure

Front 70

What is the action for Depressor Anguli Oris?

Back 70

Depresses labial commissure "Frowns"

Front 71

DEPRESSOR LABII INFERIORIS

Back 71

................

Front 72

What is the origin of the depressor Labii Inferioris?

Back 72

Mandible

Front 73

What is the insertion for the Depressor Labii Inferioris?

Back 73

Lower Lip

Front 74

What is the action for Depressor Labii Inferioris?

Back 74

Depresses lower lip, Exposing mandibular incisors "irony"

Front 75

MENTALIS

Back 75

..........

Front 76

What is the Origin of the Mentalis?

Back 76

Mandible

Front 77

What is the Insertion of the Mentalis?

Back 77

Chin

Front 78

What is the action of the Mentalis?

Back 78

Raises the chin

Wrinkles the skin

Front 79

PLATYSMA

Back 79

...........

Front 80

What is the origin of the Platysma?

Back 80

Clavicle and Shoulder

Front 81

What is the Insertion for the Platysma?

Back 81

Mandible and muscles of mouth

Front 82

What is the action of the Platysma?

Back 82

Raises skin of neck

pulls the labial commisure down "grimace"

Front 83

MUSCLES OF MASTICATION

Back 83

.....................

Front 84

Muscles of Mastication are what?

Back 84

Four pairs of muscle attached to the mandible

Front 85

What are the the four pairs of muscles of mastication?

Back 85

Masseter

Temporalis

Medial Pterygoid

Lateral pterygoid muscles

Front 86

All of the muscles of mastication are innervated by what?

Back 86

5th cranial or Trigeminal nerve

Front 87

Masseter has how many heads?

Back 87

2

Front 88

What are the 2 heads of the masseter?

Back 88

Superficial and Deep

Front 89

What is the origin of the superficial head?

Back 89

Anterior 2/3 of the lower border of the zygomatic arch

Front 90

What is the origin of the deep head of the masseter?

Back 90

Posterior 1/3 and medial surface of the zygomatic arch

Front 91

What is the insertion of the Superficial head?

Back 91

Angle of the mandible

Front 92

What is the insertion of the deep head of the Masseter?

Back 92

Ramus of the mandible

Front 93

what is the action of the Masseter muscle?

Back 93

Elevation of the mandible

Front 94

TEMPORALIS

Back 94

............

Front 95

What is the origin of the Temporalis muscle?

Back 95

Temporal Fossa on temporal bone

Front 96

What is the insertion of the Temporalis?

Back 96

Coronoid Process and

ramus of mandible

Front 97

What is the action of the Temporalis?

Back 97

Elevation of the mandible

Retraction of mandible

Front 98

MEDIAL PTERYGOID

Back 98

............

Front 99

How many heads does the medial pterygoid have?

Back 99

2

Front 100

What are the two heads of the medial pterygoid muscle?

Back 100

Deep and Superficial

Front 101

What is the origin of the deep head?

Back 101

Lateral pterygoid plate of the Spenoid bone

Front 102

What is the origin of the superficial head of the medial pterygoid

Back 102

Maxillary tuberosity of maxilla

Front 103

What is the insertion of the medial ptyergoid muscle?

Back 103

Medial surface of the Ramus and angle of the mandible

Front 104

What is the action of the medial pterygoid muscle

Back 104

Elevation of mandible

Front 105

LATERAL PTERYGOID MUSCLE

Back 105

.................

Front 106

How many heads Does the lateral pterygoid muscle have?

Back 106

2

Front 107

What are the names of the head of the lateral pterygoid muscle?

Back 107

Superior

Inferior

Front 108

What is the Origin of the superior head?

Back 108

Greater Wing of sphenoid bone

Front 109

What is the origin of the inferior head of the lateral pterygoid muscle?

Back 109

Lateral pterygoid plate of the sphenoid bone

Front 110

What is the insertion of the superior head

Back 110

Pterygoid fovea of mandible

Front 111

What is the insertion of the inferior head?

Back 111

Temporomandibular joint disk and capsule

Front 112

What is the action of the lateral pterygoid muscle?

Back 112

Both muscles protrude the mandible

Inferior head: depresses the mandible