Muscles of the Intermediate Intrinsic Back

Question 1

Insertion of the Iliocostalis Cervicis

Answer 1

Transverse processes of C4-C6

Question 2

Origin of Iliocostalis Thoracis

Answer 2

Ribs 7-12

Question 3

Insertion of Iliocostalis Thoracis

Answer 3

Ribs 1-6

Question 4

Origin of Iliocostalis Lumborum

Answer 4

Sacrum, iliac crest, and thoracolumbar fascia

Question 5

Insertion of Iliocostalis Lumborum

Answer 5

Ribs 6-12, thoracolumbar fascia, transverse processes of upper lumber vertebrae

Question 6

Innervation of the Iliocostals

Answer 6

Spinal nerves C8-L1 (posterior rami)

Question 7

Action of iliocostals

Answer 7

Bilaterally: extends the spine
Unilaterally: bend the spine laterally to the same side

Question 8

Origin of the Longissimus capitis

Answer 8

transverse process of T1-T3

transverse/articular processes of C4-C7

Question 9

insertion of longissimus capitis

Answer 9

mastoid process of temporal bone

Question 10

Origin of longissimus cervicis

Answer 10

transverse processes of T1-T6

Question 11

Insertion of longissimus cervicis

Answer 11

transverse processes of C2-C5

Question 12

origin of longissimus thoracis

Answer 12

sacrum, iliac crest, spinous processes of lower thoracic vertebrae

Question 13

insertion of longissimus thoracis

Answer 13

ribs 2-12, transverse processes of lumbar vertebrae, and costal process of the thoracic vertebrae

Question 14

Innervation of longissimus

Answer 14

C1-L5 posterior rami, lateral branches

Question 15

Action of the longissimus

Answer 15

Bilaterally: extend the head
Unilaterally: flex and rotate the head to the same side

Question 16

Origin of the spinalis cervicis

Answer 16

spinous processes of C5-T2

Question 17

insertion of the spinalis cervicis

Answer 17

spinoust processes of C2-C5

Question 18

origin of the spinalis thoracis

Answer 18

spinous processes and lateral surface of T10-L3

Question 19

insertion of the spinalis thoracis

Answer 19

spinous process and lateral surface of T2-T8

Question 20

Innervation of the Spinalis

Answer 20

dorsal rami

Question 21

actions of the spinalis

Answer 21

bilaterally: extend the cervical and thoracic spine
unilaterally: bend cervical and thoracic spine to the same side

Question 22

Origin of the Iliocostalis Cervicis

Answer 22

Ribs 3-7