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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