Origin.Insertion.Action

Origin of Buccinator

Alveolar process of mandible and maxilla

Insertion of Buccinator

Angle of mouth

Action of Buccinator

Compresses cheek against molars

Origin of Depressor Anguli Oris

Anteriolateral surface of mandibular body

Insertion of Depressor Anguli Oris

Angle of mouth

Action of Depressor Anguli Oris

Depressed angle of mouth

Origin of frontalis

Galea aponeurotica

Insertion of frontalis

skin and muscles of forehead

Action of frontalis

Raises eyebrows/ wrinkles skin of forehead

Origin of occipitalis

Superior nuchal line of occipital bone

Insertion of occipitalis

Galea aponeurotica

Action of occipitalis

Tenses scalp, moves outer ear

Origin of orbicularis oculi

Superior nuchal line of occipital bone ®

Insertion of orbicularis oculi

eyelids

Action of orbicularis oculi

Origin of orbicularis oris

maxilla and mandible

Insertion of orbicularis oris

Skin surrounding mouth

Action of orbicularis oris

closes and purses lips

Origin of zygomatic major

zygomatic bone

Insertion of zygomatic major

angle of mouth

Action of zygomatic major

raises angle of mouth

Origin of temporalis

Temporal fossa

Insertion of temporalis

coronoid process of mandible

Action of temporalis

Closes jaw (elevates mandible)

Origin of masseter

Zygomatic arch

Insertion of masseter

mandibular angle and ramus

Action of masseter

closes (elevates) and retracts mandible

Origin of platysma

skin of lower neck and upper thorax

Insertion of platysma

lower mandible and skin of the lower face

Action of platysma

Tenses skin of neck, depresses maandible

Origin of risorius

Fascia associated with masseter

Insertion of risorius

Angle of mouth

Action of risorius

Draws angle of mouth to side

Action of superior rectus

Elevate eye

Action of inferior rectus

Depresses eye

Action of Lateral rectus

Moves eye laterally

Action of Medial rectus

Moves eye medially

Action of Inferior oblique

Elevates eye and moves eye laterally

Action of Superior oblique

Depresses eye and moves laterally

Origin of ste

Insertion of sternocleidomastoid

Mastoid process of temporal bone

Action of sternocleidomastoid

Flexes and rotates cervical vertebral column

Action of erector spinae group (ILS)

Extends and laterally flexes vertebral column, head, neck

Origin of intertransversarii

Transverse processes of vertebrae

Insertion of intertransversarii

Transverse process of vertebra above

Action of intertransversarii

Laterally flexes vertebral column

Origin of interspinales

Spinous processes of vertebra

Insertion of interspinales

Spinous process of vertebra above

Action of interspinales

Extends vertebral column

Origin of rectus abdominis

Public crest

Insertion of rectus abdominis

Xiphoid process and costal cartilages of ribs 5-7

Action of rectus abdominis

Compresses abdominopelvic cavity and flexes vertebral column

Origin of external oblique

Lower 8 ribs

Insertion of external oblique

Linea alba and anterior iliac crest

Action of external oblique

Compresses abdominopelvis cavity, flexes/rotate vertebra; column

Origin of internal oblique

Inguinal ligament, iliac crest, and lumbodorsal fascia

Insertion of internal oblique

Linea alba, public crest, lower ribs

Action of internal oblique

Compresses abdominopelvis cavity, flexes/rotate vertebra; column

Origin of transversus abdominis

Thoracolumbar fascia, iliac crest, cartilages of lower ribs

Insertion of transversus abdominis

linear alba and pubic crest

Action of transversus abdominis

Compresses abdominopelvic cavity

Origin of external intercostals

Inferior border of each rib

Insertion of external intercostals

Superior border of rib below

Action of external intercostals

elevates ribs

Origin of internal intercostals

Superior border of each rib

Insertion of internal intercostals

Inferior border of rib above

Action of internal intercostals

Depresses ribs

Action of diaphragm

Elevates lower ribs, expands thoracic cavity for breathing