iliac crest, sacrum, transverse and spinous processes of vertebrae and supraspinal ligament
erector spinae origin
angles of the ribs, transverse and spinous processes of vertebrae, posterior aspect of the skull
erector spinae insertion
segmentally innervated by dorsal primary rami of spinal nerves c1-s5
erector spinae nerve supply
extends and laterally bends the trunk, neck and head
erector spinae action
iliac crest and sacrum
iliocostalis origin
angles of the ribs
iliocostalis insertion
dorsal primary rami of spinal nerves c4-s5
iliocostalis nerve supply
extends and laterally bends trunk and neck
iliocostalis action
upper border of spinous process
interspinales origin
lower border of spinous process above
interspinales insertion
dorsal primary rami of spinal nerves c1-l5
interspinales nerve supply
extend trunk and neck
interspinales action
upper border of transverse process
intertransversarii origin
lower border of transverse process above
intertransversarii insertion
dorsal primary rami of spinal nerves c1-l5
intertransversarii nerve supply
laterally bend trunk and neck
intertransversarii action
transverse process at inferior vertebral levels
longissimus origin
transverse process at superior vertebral levels and mastoid process
longissimus insertion
dorsal primary rami of spinal nerves c1-s1
longissimus nerve supply
extends and laterally bends the trunk, neck and head
longissimus action
sacrum, transverse processes of c3-l5
multifidus origin
spinous processes 2-4 vertebral levels superior to their origin
multifidus insertion
dorsal primary rami of spinal nerves c1-l5
multifidus nerve supply
extend and laterally bend trunk and neck, rotate to opposite side
multifidus action
spinous process of the axis
obliquus capitis inferior origin
transverse process of atlas
obliquus capitis inferior insertion
suboccipital nerve (dpr of c1)
obliquus capitis inferior nerve supply
rotates the head to the same side
obliquus capitis inferior action
transverse process of atlas
obliquus capitis superior origin
occipital bone above inferior nuchal line
obliquus capitis superior insertion
suboccipital nerve (dpr of c1)
obliquus capitis superior nerve supply
extends the head, rotates the head to the same side
obliquus capitis superior action
spinous process of axis
rectus capitis posterior major origin
inferior nuchal line
rectus capitis posterior major insertion
suboccipital nerve (dpr of c1)
rectus capitis posterior major nerve supply
extends the head, rotate to same side
rectus capitis posterior major action
posterior tubercle of atlas
rectus capitis posterior minor origin
inferior nuchal line medially
rectus capitis posterior minor insertion
suboccipital nerve (dpr of c1)
rectus capitis posterior minor nerve supply
extends the head
rectus capitis posterior minor action
transverse processes
rotatores origin
long rotatores: spines 2 vertebrae above origin; short rotatores: spines 1 vertebrae above origin
rotatores insertion
dorsal primary rami of spinal nerves c1-l5
rotatores nerve supply
rotates the vertebral column to the opposite side
rotatores action
transverse processes of c7-t12
semispinalis origin
capitis: back of skull between nuchal lines; cervicis & thoracis: spines 4-6 vertebrae above origin
semispinalis insertion
dorsal primary rami of spinal nerves c1-t12
semispinalis nerve supply
extends the trunk and laterally bends the trunk, rotates the trunk to the opposite side
semispinalis action
thoracolumbar fascia, spines of vertebrae t11-t12 and l1-l2
serratus posterior inferior origin
ribs 9-12, lateral to the angles
serratus posterior inferior insertion
branches of the ventral primary rami of spinal nerves t9-t12
serratus posterior inferior nerve supply
pulls down lower ribs
serratus posterior inferior action
ligamentum nuchae, spines of vertebrae c7 and t1-t3
serratus posterior superior origin
ribs 1-4, lateral to the angles
serratus posterior superior insertion
branches of the ventral primary rami of spinal nerves t1-t4
serratus posterior superior nerve supply
elevates the upper ribs
serratus posterior superior action
spinous processes at inferior vertebral levels
spinalis origin
spinous processes at superior vertebral levels and base of the skull
spinalis insertion
dorsal primary rami of spinal nerves c2-l3
spinalis nerve supply
extends and laterally bends trunk and neck
spinalis action
ligamentum nuchae and spines c7-t6
splenius origin
capitis: mastoid process & superior nuchal line laterally; cervicis: posterior tubercles of c1-c3 vertebrae
splenius insertion
dorsal primary rami of spinal nerves c2-c6
splenius nerve supply
extends and laterally bends neck and head; rotates head to same side
splenius action
ligamentum nuchae and spines of c7-t6 vertebrae
splenius capitis origin
mastoid process and lateral end of the superior nuchal line
splenius capitis insertion
dorsal primary rami of spinal nerves c2-c6
splenius capitis nerve supply
extends and laterally bends the neck and head, rotates head to the same side
splenius capitis action
ligamentum nuchae and spines of c7-t6 vertebrae
splenius cervicis origin
posterior tubercles of the transverse processes of c1-c3 vertebrae
splenius cervicis insertion
dorsal primary rami of spinal nerves c2-c6
splenius cervicis nerve supply
extends and laterally bends neck and head, rotates head to the same side
splenius cervicis action