Axial Muscles (Origin, Insertion, and Action)

What is the ORIGIN?

Epicranial aponeurosis

What is the INSERTION?

Skin of eyebrow, bridge of nose

What is the ACTION?

Raise eyebrows, wrinkle forehead

What is the ORIGIN?

Superior nuchal line

What is the INSERTION?

Epicranial aponeurosis

What is the ACTION?

Retract scalp

What is the ORIGIN?

Medial margin of orbit

What is the INSERTION?

Skin around eyelids

What is the ACTION?

Close eyes

What is the ORIGIN?

Inferior margin of orbit

What is the INSERTION?

Orbicularis oris

What is the ACTION?

Elevates upper lip

What is the ORIGIN?

Mandible

What is the INSERTION?

Skin of lower lip

What is the ACTION?

Depresses lower lip

What is the ORIGIN?

Maxilla, mandible

What is the INSERTION?

Lips

What is the ACTION?

Compresses, purses lips

What is the ORIGIN?

Mandible

What is the INSERTION?

Skin of chin

What is the ACTION?

Protrudes lower lip

What is the ORIGIN?

Clavicle, sternum

What is the INSERTION?

Mastoid process, temporal bone

What is the ACTION?

Bilateral cervical flexion, unilateral lateral flexion, unilateral contralateral rotation

What is the ORIGIN?

Sphenoid

What is the INSERTION?

Inferior surface of eye

What is the ACTION?

Inferior gaze

What is the ORIGIN?

Sphenoid

What is the INSERTION?

Superior surface of eye

What is the ACTION?

Superior gaze

What is the ORIGIN?

Sphenoid

What is the INSERTION?

Medial surface of eye

What is the ACTION?

Medial gaze

What is the ORIGIN?

Sphenoid

What is the INSERTION?

Lateral surface of eye

What is the ACTION?

Lateral gaze

What is the ORIGIN?

Sphenoid

What is the INSERTION?

Superolateral surface of eye

What is the ACTION?

Eye rolls, inferior gaze

What is the ORIGIN?

Maxilla

What is the INSERTION?

Inferolateral surface of eye

What is the ACTION?

Eye rolls, superior gaze

What is the ORIGIN?

Zygomatic bone

What is the INSERTION?

Lateral aspect of mouth

What is the ACTION?

Elevates corner of lip, draws it laterally

What is the ORIGIN?

Zygomatic bone

What is the INSERTION?

Upper lip

What is the ACTION?

Elevates upper lip

What is the ORIGIN?

Temporal bone

What is the INSERTION?

Coronoid process of mandible

What is the ACTION?

Elevates, closes mandible

What is the ORIGIN?

Zygomatic arch

What is the INSERTION?

Mandibular angle

What is the ACTION?

Elevates, closes mandible

What is the ORIGIN?

Xiphoid process, costal cartilage, ribs, lumbar vertebrae

What is the INSERTION?

Central tendon

What is the ACTION?

Flattens, increases vertical dimensions of thoracic cage

What is the ORIGIN?

Inferior border of superior rib

What is the INSERTION?

Superior border of inferior rib

What is the ACTION?

Elevates ribs

What is the ORIGIN?

Superior border of inferior rib

What is the INSERTION?

Inferior border of superior rib

What is the ACTION?

Depresses ribs

What is the ORIGIN?

Pubic crest, pubic symphysis

What is the INSERTION?

Ribs 5-7, xiphoid process

What is the ACTION?

Trunk flexion, abdomen compression

What is the ORIGIN?

Lower ribs

What is the INSERTION?

Iliac crest, linea alba

What is the ACTION?

Bilateral trunk flexion, unilateral trunk lateral flexion, abdomen compression

What is the ORIGIN?

Iliac crest

What is the INSERTION?

Lowest 3 ribs, linea alba

What is the ACTION?

Bilateral trunk flexion, unilateral trunk lateral flexion, unilateral ipsilateral rotation, abdomen compression

What is the ORIGIN?

Iliac crest, thoracolumbar fascia

What is the INSERTION?

Xiphoid process, linea alba

What is the ACTION?

Abdomen compression

What is the ORIGIN?

Sacrum, iliac crest

What is the INSERTION?

Vertebrae, ribs, base of skull

What is the ACTION?

Bilateral trunk extension, unilateral trunk lateral flexion and rotation