Axial Musculature Wish List

Occipitofrontalis frontal belly action

raises eyebrows, wrinkles forehead

Occipitofrontalis frontal belly origin

epicranial aponeurosis

Occipitofrontalis frontal belly insertion

skin of eyebrow & bridge of nose

Orbicularis Oculi action

closes eye

Orbicularis Oculi origin

medial margin of orbit

Orbicularis Oculi insertion

skin around eyelids

Levator Labii Superioris action

elevates upper lip

Levator Labii Superioris origin

inferior margin of orbit

Levator Labii Superioris insertion

orbicularis oris

Depressor Labii inferioris action

depresses lower lip

Depressor Labii inferioris origin

mandible

Depressor Labii inferioris instertion

skin of lower lip

Orbicularis Oris action

compresses, purses lips

Orbicularis Oris origin

maxilla & mandible

Orbicularis Oris insertion

lips

Mentalis action

protrudes lower lip - pouting

Mentalis origin

mandible

Mentalis insertion

skin of chin

Sternocleidomastoid action

bilaterally, flex neck. Unilaterally, laterally flex neck & turns face to the opposite side

Sternocleidomastoid origin

clavicle & sternum

Sternocleidomastoid insertion

mastoid process of temporal bone

Inferior rectus action

eyes look down

Inferior rectus origin

sphenoid

Inferior rectus insertion

inferior surface

Medial rectus action

eyes look medially

Medial rectus origin

sphenoid

Medial rectus insertion

medial surface

Superior rectus action

eyes look up

Superior rectus origin

sphenoid

Superior rectus insertion

superior surface

Lateral rectus action

eyes look laterally

Lateral rectus origin

sphenoid

Lateral rectus insertion

lateral surface

Inferior oblique action

eye rolls, looks up

Inferior oblique origin

maxilla

Inferior oblique insertion

inferior/lateral surface

Superior oblique action

eye rolls, looks down

Superior oblique origin

sphenoid

Superior oblique insertion

superior/lateral surface

Zygomaticus major action

elevates corner of mouth and draws it laterally

Zygomaticus major origin

zygomatic bone

Zygomaticus major insertion

muscles at angle of mouth

Zygomaticus minor action

elevates upper lip

Zygomaticus minor origin

zygomatic bone

Zygomaticus minor insertion

upper lip

Cranial, face, eye and neck muscles

occipitofrontalis frontal belly, orbicularis oculi, levitator labii superioris, depressor labii inferioris, orbicularis oris, mentalis, sternocleidomastoid, inferior rectus, medial rectus, superior rectus, lateral rectus, inferior oblique, superior oblique, zygomaticus major, zygomaticus minor

Temporalis action

elevates/closes jaw

Temporalis origin

temporal bone

Temporalis insertion

coronoid process of mandible

Masseter action

elevates mandible

Massteter origin

zygomatic arch

Masseter insertion

mandbile

muscles of mastication

temporalis & masseter

Ddiaphragm action

when contracted, it flattens and increases vertical dimension of thoracic cavity for inhalation. when relaxed, it moves superiorly and decrease vertical dimension of cavity for exhalation.

Diaphragm origin

diploid process of sternum/costal cartilage ribs/lumbar vertebrae & discs

Diaphragm insertion

central tendon - towards the center of diaphragm

External Intercostals action

when contracted, they elevate ribs & increase anteroposterior dimension of thoracic cavity for inhalation. When relaxed, they depress ribs and decrease dimension of cavity for exhalation

External Intercostals origin

inferior border of rib above

External Intercostals insertion

superior border of rib below

Internal Intercostals action

when contracted, depresses ribs during forced exhalation

Internal Intercostals origin

superior border of rib below

Internal Intercostals insertion

inferior border of rib above

muscles of respiration

diaphragm, external intercostals, internal intercostals

Rectus Abdominis action

flexes vertebral column & compresses abdomen

Rectus Abdominis origin

public crest/pubic symphysis

Rectus Abdominis insertion

ribs 5-7, xiphoid process of sternum

External Oblique action

Acting together - compress abdomen/flex vertebral column. Acting separately - lateral flexion of vertebral column

External Oblique origin

lower ribs

External Oblique insertion

iliac crest of ilium/linea alba

Internal Oblique action

acting together - compress abdomen/flex vertebral column. acting separately- lateral flexion of vertebral column and rotates column to same side

Internal Oblique origin

iliac crest of ilium

Internal Oblique insertion

lower 3 ribs/linea alba

Transverse Abdominis action

compresses abdomen

Transverse Abdominis origin

iliac crest of ilium/ribs

Transverse Abdominis insertion

xiphoid process of sternum, linea alba (midline) & pubic bone

abdominal muscles

Rectus abdominis, external oblique, internal oblique, transverse abdominis

Erector Spinae action

when contracting together - they extend the vertebral column & maintain posture. When contracting separately - they rotate and laterally flex the vertebral column

Erector Spinae origin

large muscle group extending from the sacrum to the base of the skull. they attach to the vertebrae and ribs along the way

Erector Spinae insertion

large muscle group extending from the sacrum to the base of the skull. They attach to the vertebrae and ribs along the way

Back muscles

Erector Spinae