Intermediate Intrinsic Back Muscles

Question 1

Iliocostalis cervicis insertion?

Answer 1

C4-C6 transverse processes

Question 2

Iliocostalis cervicis innervation?

Answer 2

Spinal nn. C8-L1 (posterior rami, lateral branches)

Question 3

Iliocostalis cervicis action?

Answer 3

Bilateral: extends spine
Unilateral: bends spine laterally

Question 4

Iliocostalis thoracis origin?

Answer 4

7th-12th ribs

Question 5

Iliocostalis thoracis insertion?

Answer 5

1st-6th ribs

Question 6

Iliocostalis thoracis innervation?

Answer 6

Spinal nn. C8-L1 (posterior rami, lateral branches)

Question 7

Iliocostalis lumborum origin?

Answer 7

Sacrum; iliac crest; thoracolumbar fasica

Question 8

Iliocostalis lumborum insertion?

Answer 8

6th-12th ribs; thoracolumbar fascia (deep layer); upper lumbar vertebrae (transverse processes)

Question 9

Iliocostalis lumborum innervation?

Answer 9

Spinal nn. C8-L1 (posterior rami, lateral branches)

Question 10

Iliocostalis lumborum action?

Answer 10

Bilateral: extends spine
Unilateral: bends spine laterally to same side

Question 11

Longissimus capitis origin?

Answer 11

T1-T3 (transverse processes);

C4-C7 (transverse and articular processes)

Question 12

Longissimus capitis insertion?

Answer 12

Temporal bone (mastoid process)

Question 13

Longissimus capitis action?

Answer 13

Bilateral: extends head
Unilateral: flexes and rotates head to same side

Question 14

Longissimus cervicis origin?

Answer 14

T1-T6(transverse processes)

Question 15

Longissimus cervicis insertion?

Answer 15

C2-C5 (transverse processes)

Question 16

Longissimus cervicis innervation?

Answer 16

Spinal nn. C1-L5 (posterior rami, lateral branches)

Question 17

Longissimus cervicis action?

Answer 17

Bilateral: extends spine
Unilateral: bends spine laterally to same side

Question 18

Longissimus thoracis origin?

Answer 18

Sacrum
Iliac crest
Lumbar vertebrae (spinous processes)
Lower thoracic vertebrae (transverse processes)

Question 19

Longissimus thoracis insertion?

Answer 19

2nd-12th ribs
Lumbar vertebrae (costal processes)
Thoracic vertebrae (transverse processes)

Question 20

Longissimus thoracis innervation?

Answer 20

Spinal nn. C1-L5 (posterior rami, lateral branches)

Question 21

Longissimus thoracis action?

Answer 21

Bilateral: extends spine
Unilateral: bends spine laterally to same side

Question 22

Spinalis cervicis origin?

Answer 22

C5-T2(spinous processes)

Question 23

Spinalis cervicis insertion?

Answer 23

C2-C5 spinous processes

Question 24

Spinalis cervicis innervation?

Answer 24

Spinal nn. (posterior rami)

Question 25

Spinalis cervicis action?

Answer 25

Bilateral: extends cervical and thoracic spine
Unilateral: bends cervical and thoracic spine to same side

Question 26

Spinalis thoracis origin?

Answer 26

T10-L3 (spinous processes, lateral surfaces)

Question 27

Spinalis thoracis insertion?

Answer 27

T2-T8(spinous processes, lateral surfaces)

Question 28

Spinalis thoracis innervation?

Answer 28

Spinal nn. (Posterior rami)

Question 29

Spinalis thoracis action?

Answer 29

Bilateral: extends cervical and thoracic spine
Unilateral: bends cervical and thoracic spine to same side

Question 30

Iliocostalis cervicis origin?

Answer 30

3rd-7th ribs