Head And Neck Muscles

Front 1

Frontalis

Back 1

Origin: Galea aponeurotuca
Insertion: Skin and eyebrow and bridge of nose.
Action: Elevates eyebrows and wrinkles forehead.

Front 2

Temporalis

Back 2

Origin: Along temporal lines of skull.
Insertion Coronoid process of mandible,
Action: Elevates mandible.

Front 3

Orbicularis oris

Back 3

Origin: Maxillary bone and Mandible.
Insertion: Lips
Action: Purses lips

Front 4

Orbicularis oculi

Back 4

Origin: medial margin of orbit
Insertion: Skin around eyes.
Action: closes eyes.

Front 5

Platysma

Back 5

Origin: cartilage of second rib and acromion of scapula.
Insertion: Mandible
Action: tenses skin of neck, depresses mandible.

Front 6

Zygomaticus major

Back 6

Origin: Zygomatic bone
Insertion: Angle of mouth
Action: Retracts and elevates corner of mouth.

Front 7

Zygomaticus minor

Back 7

Origin: zygomatic bone
Insertion: Upper lip
Action: Elevates corner of mouth, top lip.

Front 8

Masseter

Back 8

Origin: zygomatic arch
Insertion: Mandible
Action: elevates mandible.

Front 9

Sternocleidomastoid

Back 9

Origin: clavicle head: sternal end of clavicle Sternal head: to manubrium.
Insertion: Mastoid region of skull.
Action: they flex the neck, one side bends head toward shoulders and turns face to opposite side.

Front 10

Occipitalis

Back 10

Origin: Superior nuchal line
Insertion: Galea aponeurotica
Action: Tenses and retracts scalp.