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27 Cards in this Set

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  • Back
Serratus Posterior Superior
O: ligamentum nuchae and spinous processes of C7 and T1-3 vertebrae
I: upper border of ribs 2-5
N: thoracic nerves
A: raises ribs 2-5, increasing thoracic cage. muscle of Inspiration
Serratus Posterior Inferior
O: spinous processes of T11-L3
I: inferior border of last 4 ribs (ribs 9-12) near their angles
N: thoracic nerves
A: draws ribs 9-12 outward and downward, counteracting inward pull of diaphragm. muscle of Exhalation
Iliocostalis Lumborum
O: iliac crest
I: angle of ribs
N: branches of the dorsal primary divisions of the spinal nerves
A: bilateral: extend the vertebral column (draw the ribs caudally)
Unilateral: lateral flexion same side, rotation opposite side
Iliocostalis Thoracis
O: angle of ribs
I: angle of ribs
N: branches of the dorsal primary divisions of the spinal nerves
A: bilateral: extend the vertebral column (draw the ribs caudally)
Unilateral: lateral flexion same side, rotation opposite side
Iliocostalis Cervicis
O: angle of ribs
I: transverse processes of cervical vertebrae
N: branches of the dorsal primary divisions of the spinal nerves
A: bilateral: extend the neck
Unilateral: lateral flexion same side, rotation same side
Longissimus Thoracis
O: sacrum
I: transverse processes
N: branches of the dorsal primary divisions of the spinal nerves
A: bilateral: extend the vertebral column (draw the ribs caudally)
Unilateral: lateral flexion same side, rotation opposite side
Longissimus Cervicis
O: transverse processes
I: transverse processes
N: branches of the dorsal primary divisions of the spinal nerves
A: bilateral: extend the neck
Unilateral: lateral flexion same side, rotation same side
Longissimus Capitis
O: transverse processes
I: mastoid process
N: branches of the dorsal primary divisions of the spinal nerves
A: bilateral: extend the head
Unilateral: lateral flexion of head same side, rotate face same side
Spinalis Thoracis
O: spinous processes
I: spinous processes
N: branches of the dorsal primary divisions of the spinal nerves
A: bilateral: extend the vertebral column
Spinalis Cervicis
(blends with semispinalis)
O: spinous processes
I: spinous processes
N: branches of the dorsal primary divisions of the spinal nerves
A: bilateral: extend the vertebral column
Spinalis Capitis
(blends with semispinalis)
O: blends in with semispinalis muscles
I: blends in with semispinalis muscles
N: branches of the dorsal primary divisions of the spinal nerves
A: bilateral: extend the vertebral column
Splenius Capitis
Splenius Cervicis
O: ligamentum nuchae and spinous processes of C7-T6
I: capitis portion – occipital bone and mastoid process
Cervicis portion – transverse processes of upper 2 or 3 cervical vertebrae
N: middle and lower cervical spinal nerves
A: bilateral: extend head and neck, unilateral: lateral flexion neck, rotate face same side
Semispinalis Thoracis
O: transverse processes of thoracic vertebrae
I: spinous processes of lower cervical and upper thoracic vertebrae
N: dorsal primary rami of spinal nerves
A: bilateral: extends vertebral column
Unil: rotates opposite side
Semnispinalis Cervicis
O: transverse processes of cervical vertebrae
I: spinous process of C2-5
N: dorsal primary rami of spinal nerves
A: bil: extends vertebral column
Unil: rotates opposite side
Semispinalis Capitis
O: transverse processes of cervical vertebrae
I: occipital bone
N: dorsal primary rami of spinal nerves
A: bil: extends the head
Unil: rotates head opposite side
Multifidus
(easily seen in lumbar, but blends with semispinales and spinales in upper thoracic and cervical)
O: groove on each side of spinous processes of vertebrae, accessory/mammary processes.
Covers lamina from sacrum to axis
I: spinous process of vertebra above. Each bundle ascends obliquely and inserts 2-5 vertebrae above
N: dorsal primary rami of spinal nerves
A: bil: extends vertebral column
Unil: rotates opposite side, lateral flexion same side
Rotatores
(deepest group, length of vertebral column, best seen in thoracic)
O: transverse processes of one vertebra
I: base of spinous process of the vertebra above
N: dorsal primary rami of spinal nerves
A: bil: extend the vertebral column
Unil: rotate opposite side
Interspinales
(blend with
ligamentum nuchae in cervical)
O: spinous processes
I: spinous processes
N: dorsal primary rami of spinal nerves
A: extends the vertebral column
Intertransversarii
(easily seen in thoracic)
O: transverse processes
I: transverse processes
N: dorsal primary rami of spinal nerves
A: bil: extend the vertebral column
Unil: lateral flexion same side
Levator Costorum
O: transverse processes of C7-T11
I: the rib below, close to the tubercle
N: dorsal primary rami of spinal nerves
A: raises ribs, increasing thoracic cavity in inspiration
Transversospinal muscles
1. semispinalis
2. multifidus
3. rotatores
Erector spinae (sacrospinalis)
1. iliocostalis
2. longissimus
3. spinalis
What do semispinales and rotatores do?
extend and rotate to the opposite side.


they DO NOT laterally flex.
Erector spinae (sacrospinalis)

spinalis
thoracis

cervicis - cant be seen, blends w/ semispinalis

capitis - cant be seen, blends w/ semispinalis
Erector spinae (sacrospinalis)

longissimus
thoracis

cervicis

capitis
Erector spinae (sacrospinalis)

iliocostalis
lumborum

thoracis

cervicis
semispinalis
thoracis

cervicis

capitis