Head And Neck

Front 1

Frontalis
Origin

Back 1

O: epicranial aponeurosis

Front 2

Frontalis
Insertion

Back 2

skin and subQ tissue of eyebrows and forehead

Front 3

Frontalis
Action

Back 3

elevates eyebrows and wrinkles skin of forehead; protracts scalp (indicating surprise or curiosity)

Front 4

Frontalis
Innervation

Back 4

N: temporal branch of facial nerve (CN-VII)

Front 5

Orbicularis oculi
Origin

Back 5

O: medial orbital margin; medial palpebral ligament; lacrimal bone

Front 6

Orbicularis oculi
Insertion

Back 6

I: skin around margin of orbit; superior and inferior tarsal plates

Front 7

Orbicularis oculi
Action

Back 7

A: closes eyelids; palpebral part does so gently; orbital part tightly (winking)

Front 8

Orbicularis oculi
Innervation

Back 8

N: temporal and zygomatic branches of facial nerve

Front 9

Corrugator supercilii
Origin

Back 9

O: medial end of supercillary arch

Front 10

Corrugator supercilii
Insertion

Back 10

I: skin superior to middle of supraorbital margin and supercillary arch

Front 11

Corrugator supercilii
Innervation

Back 11

N: temporal branch of facial nerve

Front 12

Corrugator supercilii
Action

Back 12

A: draws eyebrow medially and inferiorly, creating vertical wrinkles above nose (demonstrating concern or worry)

Front 13

Procerus & transverse part of nasalis
Origin

Back 13

O: fascia aponeurosis covering nasal bone and lateral nasal cartilage

Front 14

Procerus & transverse part of nasalis
Insertion

Back 14

I: skin of inferior forehead; between eyebrows

Front 15

Procerus & transverse part of nasalis
Action

Back 15

A: depresses medial end of eyebrow; wrinkles skin over dorsum of nose (conveying disdain or dislike)

Front 16

Procerus & transverse part of nasalis
Innervation

Back 16

N: buccal branch of facial nerve

Front 17

levator labii superoris
Origin

Back 17

O: Infraorbital margin (maxilla)

Front 18

levator labii superoris
Insertion

Back 18

I: Skin of upper lip

Front 19

levator labii superoris
Innervation

Back 19

N: buccal branch of facial nerve

Front 20

levator labii superoris
Action

Back 20

A: Part of delants of mouth; retract and elevate and/or evert upper lip; deepen nasolabial sulcus (sadness)

Front 21

Orbicularis oris
Origin

Back 21

medial maxilla and mandible; deep surface of perioral skin; angle of mouth
(modiolus)

Front 22

Orbicularis oris
Insertion

Back 22

I: mucous membrane of lips

Front 23

Orbicularis oris
Action

Back 23

A:tonus closes rima oris; phasic contraction compresses and protudes lips (kissing) or
resists distension (when blowing)

Front 24

Orbicularis oris
Innervation

Back 24

N: buccal branch of facical nerve

Front 25

Buccinator
Origin

Back 25

O: mandible, alveolar processes of maxilla and mandible, pterygomandibular raphe

Front 26

Buccinator
Insertion

Back 26

I: angle of mouth (modiolus); orbicularis oris

Front 27

Buccinator
Action

Back 27

A: presses cheek against molar teeth; works with tongue to keep food between occlusal surfaces and out of oral vestibule; resists distension (when blowing)

Front 28

Buccinator
Innervation

Back 28

N: buccal branch of facial nerve

Front 29

Zygomaticus minor
Origin

Back 29

O: anterior aspect of zygomatic bone

Front 30

Zygomaticus minor
Insertion

Back 30

I: skin of upper lip

Front 31

Zygomaticus minor
Innervation

Back 31

N: buccal branch of facial nerve

Front 32

Zygomaticus minor
Action

Back 32

A: part of dilators of mouth; retract (elevate) and/ or evert upper lip; deepen nasolabial sulcus (showing sadness)

Front 33

Zygomaticus major
Origin

Back 33

O: lateral aspect of zygomatic bone

Front 34

Zygomaticus major
Insertion

Back 34

I: angle of mouth (modiolus)

Front 35

Zygomaticus major
Action

Back 35

A: part of dilators of mouth; elevate labial commissure-bilaterally to smile (happiness); unilaterally to sneer (disdain)

Front 36

Zygomaticus major
Innervation

Back 36

N: buccal branch of facial nerve

Front 37

Risorius
Origin

Back 37

O: parotid fascia and buccal skin (highly variable)

Front 38

Risorius
Insertion

Back 38

I: angle of mouth (modiolus)

Front 39

Risorius
Innervation

Back 39

N: buccal branch of facial nerve

Front 40

Risorius
Action

Back 40

A: part of dilators of mouth; widens rima oris, as when grinning or grimacing

Front 41

Depressor anguli oris
Origin

Back 41

O: anterolateral base of mandible

Front 42

Depressor anguli oris
Insertion

Back 42

I: angle of mouth (modiolus)

Front 43

Depressor anguli oris
Innervation

Back 43

N: marginal mandibular branch of facial nerve

Front 44

Depressor anguli oris
Action

Back 44

A: part of dilators of mouth; depresses labial commissure bilaterally to frown (sadness)

Front 45

Depressor labii inferioris
Origin

Back 45

O: platysma and anterolateral body of mandible

Front 46

Depressor labii inferioris
Insertion

Back 46

I: skin of lower lip

Front 47

Depressor labii inferioris
Innervation

Back 47

N: marginal mandibular branch of facial nerve

Front 48

Depressor labii inferioris
Action

Back 48

A: part of dilators of mouth; retracts (depresses) and/ or everts lower lip (pouting, sadness)

Front 49

Mentalis
Origin

Back 49

O: body of mandible (anterior to roots of inferior incisors)

Front 50

Mentalis
Insertion

Back 50

I: skin of chin (mentolabial sulcus)

Front 51

Mentalis
Action

Back 51

A: elevates and protrudes lower lip; elevates skin of chin (showing doubt)

Front 52

Mentalis
Innervation

Back 52

N: marginal mandibular branch of facial nerve

Front 53

Levator palpebrae superioris
Origin

Back 53

O: lesser wing of sphenoid bone, superior and anterior to optic canal

Front 54

Levator palpebrae superioris
Insertion

Back 54

I: superior tarsus and skin of superior eyelid

Front 55

Levator palpebrae superioris
Innervation

Back 55

N: oculomotor nerve; deep layer supplied by sympathetic fibers

Front 56

Levator palpebrae superioris
Action

Back 56

A: elevates superior eyelid

Front 57

Temporalis
Origin

Back 57

O: floor of temporal fossa and deep surface of temporal fascia

Front 58

Temporalis
Insertion

Back 58

I: tip and medial surface of coronoid process and anterior border of ramus of mandible

Front 59

Temporalis
Innervation

Back 59

N: anterior trunk of mandibular nerve (CN-V3) via deep temporal branches

Front 60

Temporalis
Action

Back 60

A: elevates mandible, closing jaws; posterior, more horizontal fibers are 1° retractors of mandible

Front 61

Masseter
Origin

Back 61

O: inferior border and medial surface of maxillary process of zygomatic bone and zygomatic arch

Front 62

Masseter
Insertion

Back 62

I: angle and lateral surface of ramus of mandible

Front 63

Masseter
Innervation

Back 63

N: anterior trunk of mandibular nerve (CN-V3) via masseteric nerve

Front 64

Masseter
Action

Back 64

A: elevates mandible, closing jaws; superficial fibers make limited contribution to protrusion of mandible

Front 65

Platysma
Origin

Back 65

O: subcutaneous tissue of infraclavicular and supraclavicular regions

Front 66

Platysma
Insertion

Back 66

I: base of mandible; skin of cheek and lower lip; angle of mouth (modiolus); orbicularis
oris

Front 67

Platysma
Innervation

Back 67

N: cervical branch of facial nerve

Front 68

Platysma
Action

Back 68

A: depresses mandible (against resistance); tenses skin of inferior face and neck (Conveying tension and stress)

Front 69

Sternocleidomastoid (SCM)
Origin

Back 69

O: lateral surface of mastoid process of temporal bone and lateral half of superior nuchal
line

Front 70

Sternocleidomastoid (SCM)
Insertion

Back 70

I: sternal head: anterior surface of manubrium of sternum
clavicular head: superior surface of medial third of clavicle

Front 71

Sternocleidomastoid (SCM)
Innervation

Back 71

N: spinal accessory nerve (CN-XI motor); C2 & C3 nerves (pain & proprioception)

Front 72

Sternocleidomastoid (SCM)
Action

Back 72

: unilateral contraction: it and rotates it so face is turned superiorly toward opposite side