OI Lumbar/Cervical Spine

Erector spinae group

O: common tendon that attaches to the posterior surface of the sacrum, iliac crest, spinous processes of the lumbar, and last two vertebrae
I: posterior ribs, spinous and transverse process of thoracic and cervical vertebrae, mastoid process of temporal bone

quadratus lumborum

O: posterior iliac crest
I: last rib and transverse process of first through fourth lumbar vertebrae

rectus abdominus

O: pubic crest, pubic symphysis
I: cartilage of fifth, sixth, and seventh ribs and xiphoid process

internal obliques

O: lateral inguinal ligament, iliac crest, and thoracolumbar fascia
I: internal surface of the lower three ribs, rectus sheath to linea alba

external obliques

O: external surfaces of fifth to twelfth ribs
I: Anterior part of the iliac crest, rectus sheath to linea alba

scalenes

Origins:
anterior fibers: transverse processes of C3-6
middle fibers: transverse processes of C2-7
posterior fibers: transverse processes of C6-7

Insertion:
anterior & middle: first rib
posterior: 2nd rib

sternocleidomastoid

O: manubrium, medial 1/3 of clavicle
I: mastoid process of temporal bone

splenius capitus

O: ligamentum nuchae and spinous processes of C7-T4
I: mastoid process and lateral portion of superior nuchal line

levator scapulae

O: transverse processes of C1-4
I: medial border of scapula, between superior angle and spine portion

masseter

O: zygomatic arch
I: angle and ramus of mandible

temopralis

O: temporal fossa and fascia
I: coronoid process and anterior edge of ramus of mandible