Muscles Of Thorax And Spine Aoin

Front 1

Erector Spinae Group (name)

Back 1

Spinalis, Longissimus, Iliocostalis

Front 2

Spinalis AOIN

(thoracis and cervicis)

Back 2

A: Unilaterally: Laterally flex vertebral column to the same side
Bilaterally: Extend the vertebral column

O: Spinous processes of the upper lumbar and lower thoracic veterbrae (thoracis)
Ligamentum Nuchae, Spinous processes of C-7 (cervicis)

I: Spinous processes of upper thoracic (thoracis)
Spinous processes of cervicals, except C-1 (cervicis)

N: Dorsal primary divisions of spinal nerves

Front 3

Longissimus AOIN

(Capitis, cervicis, and thoracis)

Back 3

A: Unilaterally: Laterally flex vertebral column to the same side
Bilaterally: Extend the vertebral column

O: Common tendon (thoracis)
Transverse processes of upper 5 thoracic vertebrae (cervicis and capitis)

I: Lower 9 ribs and tranverse processes of thoracic vertebrae (thoracis)
Transverse processes of cervical vertebrae (cervicis)
Mastoid process of temporal bone (capitis)

N: Dorsal primary divisions of spinal nerves

Front 4

Iliocostalis AOIN

(Lumborum, Thoracis, cervicis)

Back 4

A: Unilaterally: Laterally flex vertebral column to the same side
Bilaterally: Extend the vertebral column

O: Common tendon (lumborum)
Posterior surface of ribs 1-12 (thoracis and cervicis)

I: Transverse processes of lumbar vertebrae 1-3 and posterior surface of ribs 6-12 (lumborum)
Posterior surface of ribs 1-6 (thoracis)
Transverse processes of lower cervicals (cervicis)

N: Dorsal primary divisions of spinal nerves

Front 5

Transversospinalis Group (name)

Back 5

Multifidi, Rotatores, Semispinalis Capitis

Front 6

Multifidi AOIN

Back 6

A: Unilaterally: Rotate the vertebral column to the opposite side
Bilaterally: Extend the vertebral column

O: Sacrum and transverse processes of lumbar trough cervical vertebrae

I: Spinous processes of lumbar vertebrae through second cervical vertebra (span two to four vertebrae)

N: Dorsal primary divisions of spinal nerves

Front 7

Rotatores AOIN

Back 7

A: Unilaterally: Rotate the vertebral column to the opposite side
Bilaterally: Extend the vertebral column

O: Transverse processes of lumbar through cervical vertebrae

I: Spinous processes of lumbar vertebrae through second cervical vertebra (span one to two vertebrae)

N: Dorsal primary divisions of spinal nerves

Front 8

Semispinalis Capitis AOIN

Back 8

A: Extend the vertebral column and head

O: Transverse processes of thorcaic vertebrae, articular processes of lower cervicals

I: Spinous processes of upper thoracic and cervicals (except C-1), and superior nuchal line of occiput

N: Dorsal primary divisions of spinal nerves

Front 9

Splenii Group (name)

Back 9

Splenius Capitis and Cervicis

Front 10

Splenius Capitis AOIN

Back 10

A: Unilaterally: Rotate the head and neck to the same side, laterally flex the head and neck
Bilaterally: Extend the head and neck

O: Ligamentum nuchae, spinous processes of C-7 to T-3

I: Mastoid process and lateral portion of the superior nuchal line

N: Branches of dorsal division of cervical

Front 11

Splenius Cervicis AOIN

Back 11

A: Unilaterally: Rotate the head and neck to same side, laterally flex the head and neck
Bilaterally: Extend the head and neck

O: Spinous processes of T-3 to T-6

I: Transverse processes of the upper cervical vertebrae

N: Branches of dorsal division of cervical

Front 12

Suboccipitals (name)

Back 12

Rectus Capitis Posterior Major, Rectus Capitis Posterior Minor, Oblique Capitis Superior, Oblique Capitis Inferior

Front 13

Rectus Capitis Posterior Major AOIN

Back 13

A: Rock and tilt the head back into extension, rotate the head to same side

O: Spinous process of the axis (C-2)

I: Inferior nuchal line of the occiput

N: Suboccipital

Front 14

Rectus Capitis Posterior Minor AOIN

Back 14

A: Rock and tilt the head back into extension

O: Tubercle of the posterior arch of the atlas (C-1)

I: Inferior nuchal line of the occiput

N: Suboccipital

Front 15

Oblique Captits Superior AOIN

Back 15

A: Rock and tilt the head back into extension

O: Transverse process of the atlas (C-1)

I: Between the nuchal lines of the occiput

N: Suboccipital

Front 16

Oblique Capitis Inferior AOIN

Back 16

A: Rotate the head to the same side

O: Spinous process of Axis (C-2)

I: Transverse process of Atlas (C-1)

N: Suboccipital