Muscles Of Back

Front 1

origin of erector spinae

Back 1

iliac crest, sacrum, transverse and spinous processes of vertebrae and supraspinal ligament

Front 2

origin of iliocostalis

Back 2

iliac crest and sacrum

Front 3

origin of interspinales

Back 3

upper border of spinous process

Front 4

origin of intertransversarii

Back 4

upper border of transverse process

Front 5

origin of longissimus

Back 5

transverse process at inferior vertebral levels

Front 6

origin of multifidus

Back 6

sacrum, transverse processes of C3-L5

Front 7

origin of obliquus capitis inferior

Back 7

spinous process of the axis

Front 8

origin of obliquus capitis superior

Back 8

transverse process of atlas

Front 9

origin of rectus capitis posterior major

Back 9

spinous process of axis

Front 10

origin of rectus capitis posterior minor

Back 10

posterior tubercle of atlas

Front 11

origin of rotatores

Back 11

transverse processes

Front 12

origin of semispinalis

Back 12

transverse processes of C7-T12

Front 13

origin of spinalis

Back 13

spinous processes at inferior vertebral levels

Front 14

origin of splenius

Back 14

ligamentum nuchae and spines C7-T6

Front 15

origin of splenius capitis

Back 15

ligamentum nuchae and spines of C7-T6 vertebrae

Front 16

origin of splenius cervicis

Back 16

ligamentum nuchae and spines of C7-T6 vertebrae

Front 17

insertion of erector spinae

Back 17

angles of the ribs, transverse and spinous processes of vertebrae, posterior aspect of the skull

Front 18

insertion of iliocostalis

Back 18

angles of the ribs

Front 19

insertion of interspinales

Back 19

lower border of spinous process above

Front 20

insertion of intertransversarii

Back 20

lower border of transverse process above

Front 21

insertion of longissimus

Back 21

transverse process at superior vertebral levels and mastoid process

Front 22

insertion of multifidus

Back 22

spinous processes 2-4 vertebral levels superior to their origin

Front 23

insertion of obliquus capitis inferior

Back 23

transverse process of atlas

Front 24

insertion of obliquus capitis superior

Back 24

occipital bone above inferior nuchal line

Front 25

insertion of rectus capitis posterior major

Back 25

inferior nuchal line

Front 26

insertion of rectus capitis posterior minor

Back 26

inferior nuchal line medially

Front 27

insertion of rotatores

Back 27

long rotatores: spines 2 vertebrae above origin; short rotatores: spines 1 vertebrae above origin

Front 28

insertion of semispinalis

Back 28

capitis: back of skull between nuchal lines; cervicis & thoracis: spines 4-6 vertebrae above origin

Front 29

insertion of spinalis

Back 29

spinous processes at superior vertebral levels and base of the skull

Front 30

insertion of splenius

Back 30

capitis: mastoid process & superior nuchal line laterally; cervicis: posterior tubercles of C1-C3 vertebrae

Front 31

insertion of splenius capitis

Back 31

mastoid process and lateral end of the superior nuchal line

Front 32

insertion of splenius cervicis

Back 32

posterior tubercles of the transverse processes of C1-C3 vertebrae

Front 33

action of erector spinae

Back 33

extends and laterally bends the trunk, neck and head

Front 34

action of iliocostalis

Back 34

extends and laterally bends the trunk and neck

Front 35

action of interspinales

Back 35

extend trunk and neck

Front 36

action of intertransversarii

Back 36

laterally bend trunk and neck

Front 37

action of longissimus

Back 37

extends and laterally bends the trunk, neck and head

Front 38

action of multifidus

Back 38

extend and laterally bend trunk and neck, rotate to opposite side

Front 39

action of obliquus capitis inferior

Back 39

rotates the head to the same side

Front 40

action of obliquus capitis superior

Back 40

extends the head, rotates the head to the same side

Front 41

action of rectus capitis posterior major

Back 41

extends the head, rotate to same side

Front 42

action of rectus capitis posterior minor

Back 42

extends the head

Front 43

action of rotatores

Back 43

rotates the vertebral column to the opposite side

Front 44

action of semispinalis

Back 44

extends the trunk and laterally bends the trunk, rotates the trunk to the opposite side

Front 45

action of spinalis

Back 45

extends and laterally bends trunk and neck

Front 46

action of splenius

Back 46

extends and laterally bends neck and head; rotates head to same side

Front 47

splenius capitis

Back 47

extends and laterally bends the neck and head, rotates head to the same side

Front 48

splenius cervicis

Back 48

extends and laterally bends neck and head, rotates head to the same side

Front 49

innervation of erector spinae

Back 49

segmentally innervated by dorsal primary rami of spinal nerves C1-S5

Front 50

innervation of iliocostalis

Back 50

dorsal primary rami of spinal nerves C4-S5

Front 51

innervation of interspinales

Back 51

dorsal primary rami of spinal nerves C1-L5

Front 52

innervation of intertransversarii

Back 52

dorsal primary rami of spinal nerves C1-L5

Front 53

innervation of longissimus

Back 53

dorsal primary rami of spinal nerves C1-S1

Front 54

innervation of multifidus

Back 54

dorsal primary rami of spinal nerves C1-L5

Front 55

innervation of obliquus capitis inferior

Back 55

suboccipital nerve (DPR of C1)

Front 56

innervation of obliquus capitis superior

Back 56

suboccipital nerve (DPR of C1)

Front 57

innervation of rectus capitis posterior major

Back 57

suboccipital nerve (DPR of C1)

Front 58

innervation of rectus capitis posterior minor

Back 58

suboccipital nerve (DPR of C1)

Front 59

innervation of rotatores

Back 59

dorsal primary rami of spinal nerves C1-L5

Front 60

innervation of semispinalis

Back 60

dorsal primary rami of spinal nerves C1-T12

Front 61

innervation of spinalis

Back 61

dorsal primary rami of spinal nerves C2-L3

Front 62

innervation of splenius

Back 62

dorsal primary rami of spinal nerves C2-C6

Front 63

innervation of splenius capitis

Back 63

dorsal primary rami of spinal nerves C2-C6

Front 64

innervation of splenius cervicis

Back 64

dorsal primary rami of spinal nerves C2-C6

Front 65

arteries of erector spinae

Back 65

supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal aa., lumbar aa.

Front 66

arteries of iliocostalis

Back 66

supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal aa., lumbar aa.

Front 67

arteries of interspinales

Back 67

supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal aa., lumbar aa.

Front 68

arteries of intertransversarii

Back 68

supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal aa., lumbar aa.

Front 69

arteries of longissimus

Back 69

supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal aa., lumbar aa.

Front 70

arteries of multifidus

Back 70

supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal aa., lumbar aa.

Front 71

arteries of obliquus capitis inferior

Back 71

occipital a.

Front 72

arteries of obliquus capitis superior

Back 72

occipital a.

Front 73

arteries of rectus capitis posterior major

Back 73

occipital a.

Front 74

arteries of rectus capitis posterior minor

Back 74

occipital a.

Front 75

arteries of rotatores

Back 75

supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal aa., lumbar aa.

Front 76

arteries of semispinalis

Back 76

supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal aa., lumbar aa.

Front 77

arteries of spinalis

Back 77

supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal aa., lumbar aa.

Front 78

arteries of splenius

Back 78

supplied segmentally by: deep cervical a., posterior intercostal aa.

Front 79

arteries of splenius capitis

Back 79

supplied segmentally by: deep cervical a., posterior intercostal aa.

Front 80

arteries of splenius cervicis

Back 80

supplied segmentally by: deep cervical a., posterior intercostal aa.

Front 81

notes on erector spinae

Back 81

the erector spinae m. is separated into 3 columns of muscle: iliocostalis laterally, longissimus in an intermediate position and spinalis medially; each of these columns has multiple named parts

Front 82

notes on iliocostalis

Back 82

the most lateral part of the erector spinae; it may be subdivided into lumborum, thoracis and cervicis portions

Front 83

notes on interspinales

Back 83

these are small and fairly insignificant muscles

Front 84

notes on intertransversarii

Back 84

these are small and fairly insignificant muscles

Front 85

notes on longissimus

Back 85

the intermediate part of the erector spinae;it may be subdivided into thoracis, cervicis and capitis portions

Front 86

notes on multifidus

Back 86

semispinalis, multifidus and rotatores make up the transversospinal muscle group

Front 87

notes on obliquus capitis inferior

Back 87

greater occipital nerve (DPR of C2) passes superiorly around the inferior margin of inferior oblique

Front 88

notes on obliquus capitis superior

Back 88

the suboccipital triangle is formed by obliquus capitis superior and inferior and rectus capitis posterior major

Front 89

notes on rectus capitis posterior major

Back 89

none

Front 90

notes on rectus capitis posterior minor

Back 90

rectus capitis posterior minor is deeper and inserts more medial than rectus capitis posterior major

Front 91

notes on rotatores

Back 91

semispinalis, multifidus and rotatores make up the transversospinal muscle group

Front 92

notes on semispinalis

Back 92

three parts are named based on their insertions: capitis, cervicis and thoracis; semispinalis, multifidus and rotatores make up the transversospinal muscle group

Front 93

notes on spinalis

Back 93

most medial part of the erector spinae; may be subdivided into thoracis, cervicis and capitis portions

Front 94

notes on splenius

Back 94

splenius means bandage; it gets its name from its broad, flat shape

Front 95

notes on splenius capitis

Back 95

named for its shape: splenius means bandage and capitis refers to the insertion of this portion of the muscle

Front 96

notes on splenius cervicis

Back 96

named for its shape: splenius means bandage and cervicis refers to the insertion of this portion of the muscle