Intrinsic Back Muscles - Superficial and Intermediate

Question 1

Splenius capitis origin

Answer 1

Caudal half of ligamentum nuchae, spinous processes of C7-T3/4

Question 2

Splenius capitis insertion

Answer 2

Mastoid process and occipital bone inferior to lateral third of superior nuchal line

Question 3

Splenius capitis innervation

Answer 3

Dorsal rami of middle cervical nerves

Question 4

Splenius capitis blood supply

Answer 4

Muscular and descending branches of occipital artery, superficial branch of transverse cervical artery

Question 5

Splenius capitis actions

Answer 5

Unilaterally rotate head and neck
Bilaterally extends head and neck

Question 6

Splenius cervicis origin

Answer 6

Narrow, tendinous band from spinous processes T3-T6

Question 7

Splenius cervicis insertion

Answer 7

Posterior tubercles of transverse processes of upper 2-3 cervical vertebrae

Question 8

Splenius cervicis innervation

Answer 8

Dorsal rami of lower cervical nerves

Question 9

Splenius cervicis blood supply

Answer 9

Muscular and descending branches of occipital artery
Superficial branch of transverse cervical artery

Question 10

Splenius cervicis actions

Answer 10

Unilaterally draws head to one side and slightly rotates
Bilaterally extends head

Question 11

Which muscles are part of the superficial layer of intrinsic back?

Answer 11

Splenius capitis and splenius cervicis

Question 12

Which muscles are part of the intermediate layer of the intrinsic back?

Answer 12

Erector spinae group

Question 13

Which muscles are part of the erector spinae group?

Answer 13

Iliocostalis, longissimus, spinalis

Question 14

erector spinae group

Iliocostalis lumborum origin

Answer 14

Thoracolumbar fascia

Question 15

erector spinae group

Iliocostalis lumborum insertion

Answer 15

Lower borders of lower 6-7 ribs near angles

Question 16

erector spinae group

Iliocostalis lumborum innervation

Answer 16

Dorsal rami of lumbar spinal nerves

Question 17

erector spinae group

Iliocostalis lumborum blood supply

Answer 17

Posterior intercostal arteries, lumbar arteries

Question 18

erector spinae group

Iliocostalis lumborum actions

Answer 18

Extension and lateral flexion of vertebral column

Question 19

erector spinae group

Iliocostalis thoracis origin

Answer 19

Upper borders of lower six ribs medial to insertions of iliocostalis lumborum

Question 20

erector spinae group

Iliocostalis thoracis insertion

Answer 20

Upper six ribs and sometimes transverse process of C7

Question 21

erector spinae group

Iliocostalis thoracis innervation

Answer 21

Dorsal rami of thoracic spinal nerves

Question 22

erector spinae group

Iliocostalis thoracis blood supply

Answer 22

Posterior intercostal arteries

Question 23

erector spinae group

Iliocostalis thoracis action

Answer 23

Extension of vertebral column

Question 24

erector spinae group

Iliocostalis cervicis origin

Answer 24

Upper six ribs medial to the insertion of iliocostalis thoracis

Question 25

# erector spinae group Iliocostalis cervicis insertion

Answer 25

Transverse processes of C4-C6

Question 26

# erector spinae group Iliocostalis cervicis innervation

Answer 26

Dorsal rami spinal nerves C4-C6

Question 27

# erector spinae group Iliocostalis cervicis blood supply

Answer 27

Posterior intercostal arteries

Question 28

# erector spinae group Iliocostalis cervicis actions

Answer 28

Extension and lateral flexion of vertebral column

Question 29

# erector spinae group Longissimus thoracis origin

Answer 29

Thoracolumbar fascia, accessory processes of lumbar vertebrae

Question 30

# erector spinae group Longissimus thoracis insertion

Answer 30

Transverse processes of the lower nine thoracic vertebrae and lower nine ribs

Question 31

# erector spinae group Longissimus thoracis innervation

Answer 31

Dorsal rami of spinal nerves T1-T12

Question 32

# erector spinae group Longissimus thoracis blood supply

Answer 32

Posterior intercostal and lumbar arteries

Question 33

# erector spinae group Longissimus thoracis actions

Answer 33

Extension and lateral flexion of vertebral column

Question 34

# erector spinae group Longissimus cervicis origin

Answer 34

Transverse processes of upper 4-6 thoracic vertebrae medial to insertion of longissimus thoracis

Question 35

# erector spinae group Longissimus cervicis insertion

Answer 35

Transverse processes C2-C6

Question 36

# erector spinae group Longissimus cervicis innervation

Answer 36

Dorsal rami of spinal nerves C4-C8

Question 37

# erector spinae group Longissimus cervicis blood supply

Answer 37

Posterior intercostal arteries

Question 38

# erector spinae group Longissimus cervicis actions

Answer 38

Extension and lateral flexion of vertebral column

Question 39

# erector spinae group Longissimus capitis origin

Answer 39

Medial to upper border of longissimus cervicis, articular processes of lower four cervical vertebrae

Question 40

# erector spinae group Longissimus capitis insertion

Answer 40

Posterior edge of the mastoid process

Question 41

# erector spinae group Longissimus capitis innervation

Answer 41

Dorsal rami spinal nerves C3-C8

Question 42

# erector spinae group Longissimus capitis blood supply

Answer 42

Muscular branches of occipital artery, deep cervical branch of costocervical trunk

Question 43

# erector spinae group Longissimus capitis actions

Answer 43

Bilaterally extends vertebral column Unilaterally rotates face laterally

Question 44

# erector spinae group Spinalis thoracis origin

Answer 44

Blends with longissimus thoracis, and arises from spinous processes of T11-L2

Question 45

# erector spinae group Spinalis thoracis insertion

Answer 45

Spinous processes of upper 4-8 thoracic vertebrae

Question 46

# erector spinae group Spinalis thoracis innervation

Answer 46

Dorsal rami of T1-T12

Question 47

# erector spinae group Spinalis thoracis blood supply

Answer 47

Posterior intercostal arteries

Question 48

# erector spinae group Spinalis thoracis actions

Answer 48

Extension and lateral flexion of the vertebral column