mvs 230 module 10 muscles

erector spinae origin

posterior sacrum & iliac crest, spinous processes of lumbar vertebrae

erector spinae insertion

posterior portion of vertebrae and ribs

erector spinae function

trunk extension, ipsilateral lateral flexion

external oblique origin

rib 5-12

external oblique insertion

anterior iliac crest, pubic tubercle, linea alba

external oblique function

trunk flexion, contralateral rotation

internal oblique origin

anterior iliac crest, throacolumbar fascia

internal oblique insertion

ribs 10-12, linea alba, pubis

internal oblique function

flexion, ipsilateral rotation

interspinalis origin

spinous processes of vertebrae

interspinales insertion

adjacent spinous processes

interspinales function

trunk extension

intertransversarius origin

transverse processes of vertebrae

intertransversarius insertion

adjacent transverse processes

intertransversarius function

lateral trunk flexion

lateral pterygoid origin

sphenoid bone

lateral pterygoid insertion

neck of mandible

lateral pterygoid function

protraction, depression, contralateral glide

longus capitis origin

trasnverse processes of cervical vertebrae

longus capitis insertion

occipital bone

longus capitis function

flexion, lateral flexion

longus colli origin

transverse processes of cervical and thoracic vertebrae

longus colli insertion

cervical vertebrae

longus colli function

flexion, rotation, lateral flexion

masseter origin

zygomatic arch

masseter insertion

mandibular ramus, mandibular angle

masseter function

protraction

medial pterygoid origin

sphenoid bone

medial pterygoid insertion

mandibular ramus, mandibular angle

medial pterygoid function

elevation

multifidus origin

transverse processes of thoracic vertebrae, sacrum, ilium

multifidus insertion

spinous processes of vertebrae

multifidus function

extension, ipsilatereal lateral flexion, contralateral rotation

obliquus capitis inferior origin

axis

obliquus capitis inferior insertion

atlas

obliquus capitis inferior function

rotates head and 1st cervical vertebrae

obliquus capitis superior origin

atlas

obliquus capitis superior insertion

occipital bone

obliquus capitis superior function

extension, ipsilateral lateral flexion

psoas major origin

bodies and transverse processes of lumbar vertebrae

psoas major insertion

lesser trochanter

psoas major function

hip flexion, trunk flexion

quadratus lumborum origin

rib 12, lumbar transverse processes

quadratus lumborum insertion

iliac crest

quadratus lumborum function

lumbar extension, ipsilateral lateral flexion

rectus abdominis origin

pubic crest

rectus abdominis insertion

xiphoid process, ribs

rectus abdominis function

trunk flexion

rectus capitis anterior origin

atlas

rectus capitis anterior insertion

occipital bone

rectus capitis anterior function

head flexion, lateral flexion

rectus capitis posterior major origin

axis

rectus capitis posterior major insertion

occipital bone

rectus capitis posterior major function

head extension, ipsilateral lateral flexion

rectus capitis posterior minor origin

atlas

rectus capitis posterior minor insertion

occipital bone

rectus capitis posterior minor function

head extension

rotatores origin

transverse processes of vertebrae

rotatores insertion

spinous processes of vertebrae

rotatores function

spine extension, contralateral rotation

scalenus anterior origin

transverse processes of cervical vertebrae

scalenus anterior insertion

first rib

scalenus anterior function

neck flexion, ipsilateral lateral flexion

scalenus medius origin

transverse processes of cervical vertebrae

scalenus medius insertion

first rib, sometimes second rib

scalenus medius function

ipsilateral lateral flexion

scalenus posterior origin

transverse processes of cervical vertebrae

scalenus posterior insertion

second ribs

scalenus posterior function

ipsilateral lateral flexion

semispinalis capitis origin

transverse processes of vertebrae

semispinales capitis insertion

spinous processes of vertebrae, occiput

semispinales capitis function

head and neck extension, contralateral neck rotation

splenius capitis origin

cervical and thoracic vertebrae

splenius capitis insertion

mastoid process and occipital bone

splenius capitis function

head extension, ipsilateral lateral flexion and rotation

sternocleidomastoid origin

sternum and medial 1/3 of clavicle

sternocleidomastoid insertion

mastoid process

sternocleidomastoid function

contralateral rotation of head and neck, ipsilateral lateral flexion, flexion

temporalis origin

lateral skull

temporalis insertion

coronoid process & ramus of mandible

temporalis function

elevation and retraction of mandible