Anatomy Muscle Origin, Insertion And Action

Front 1

Intertransversarii

Back 1

O: transverse process of each vertebrae
I: transverse processes of more superior vertebrae
A: laterally flexes the vertebral column

Front 2

Longus Capitis

Back 2

O: transverse process of cervical vertebrae
I: base of occipital bone
A: both sides flex the neck

Front 3

Longus Colli

Back 3

O: anterior surfaces of cervical and superior thoracic vertebrae
I: transverse processes of superior cervical vertebrae
A: flex/rotates neck and limits hypertension

Front 4

Quadratus Lumborum

Back 4

O: iliac crest and iliolumbar ligament
I: last rib and transverse processes of lumbar vertebrae
A: they depress ribs

Front 5

Splenius

Back 5

O: stretches from cervical column to the top of the thoracic column
I: occipital ligament part of spinous process cervical column
A: extends neck

Front 6

Spiinalis Cervicis

Back 6

O: small ligament part of spinous processes/cervical column
I: axis for the spinous process
A: extends neck

Front 7

Spinalis Thoracis

Back 7

O: connected to the spinous processes of inferior cervical and superior lumbar vertebrae
I: connected to the spinous processes of superior thoracic vertebrae
A: extends the vertebral column

Front 8

Longissimus Capitis

Back 8

O: connected to transverse processes of inferior cervical and superior thoracic vertebrae
I: connected to mastoid process of the temporal bone
A: extend the head/rotate the neck/flexes each side of the neck

Front 9

Longissimus Cervicis

Back 9

O: connected to the transverse processes of the inferior thoracic superior lumbar
I: connected to the transverse processes of the superior vertebrae and inferior surfaces of ribs
A: extends vertebral column/helps move the side of the neck

Front 10

Iliocostalis Cervicis

Back 10

O: superior borders of vertebrosternal ribs near the angles {near sternum}
I: transverse processes of middle adn inferior cervical vertebrae
A: extends/flexes the neck and elevates ribs

Front 11

Iliocostalis Thoracis

Back 11

O: superior borders of inferior 7 ribs medial to angles
I: upper ribs and transverse processes of last cervical vertebra
A: stabilizes thoracic vertebrae in extention

Front 12

Iliocostalis Lumborum

Back 12

O: iliac crests, sacral crests and spinous processes
I: inferior surfaces of inferior 7 ribs near angles
A: extends vertebral column/depresses ribs

Front 13

External Intercostals

Back 13

O: inferior border of each rib
I: superior border of more inferior ribs
A: elevates ribs

Front 14

Internal Intercostals

Back 14

O: superior border of each rib
I:inferior border of preceding rib
A: depresses ribs

Front 15

Transversis Thoracis

Back 15

O: posterior surface of sternum
I: cartilage of rib
A: depresses ribs

Front 16

Serratus Posterior Superior

Back 16

O: spinous processes of c2-t3/ligament nuchae
I: superior borders of ribs 2-5 near angles
A: elevates ribs

Front 17

Serratus Posterior Inferior

Back 17

O: aponuerosis from spinous processes of t10-L3
I: inferior borders of ribs 8-12
A: pulls ribs inferious

Front 18

External Oblique

Back 18

O: external/inferior borders of ribs 5-12
I: lines alba and iliac crest
A: compresses abdomen

Front 19

Internal Oblique

Back 19

O: lumbodorsal fascia and iliac crest
A: compresses abdomen/depresses rib

Front 20

Transversus Abdominus

Back 20

O: cartilage of ribs 5-12 , iliac crest
I: lines alba and pubis
A: compresses abdomen

Front 21

Diaphragm

Back 21

O: xiphoid processes, cartilage of ribs 4-10
I: central tendinous sheet
A: expands thoracic cavity

Front 22

Rectus Abdominals

Back 22

O: superior surface of pubis
I: interior surface of costal cartilage
A: depresses rib