Intrinsic Back Muscles, Superficial & Intermediate

Question 1

Superficial intrinsic back muscles?

Answer 1

Serratus posterior, splenius

Question 2

Intermediate intrinsic back muscles? (3)

Answer 2

Iliocostalis, Longissimus, Spinalis

Question 3

Origin of the Serratus posterior superior?

Answer 3

Nuchal ligament; spinous process of C7-T3

Question 4

Insertion of Serratus posterior superior?

Answer 4

2nd-4th ribs (superior borders)

Question 4

Innervation of Serratus posterior superior?

Answer 4

Spinal nn. T2-T5 (anterior rami)

Question 5

Action of Serratus posterior superior?

Answer 5

Elevates ribs

Question 6

Origin of Serratus posterior inferior?

Answer 6

Spinous process of T11-L2

Question 7

Insertion of Serratus Posterior Inferior?

Answer 7

8th-12th ribs (inferior borders, near angles)

Question 8

Innervation of Serratus posterior inferior?

Answer 8

Spinal nn. T9-T12 (anterior rami)

Question 9

Action of Serratus Posterior Inferior?

Answer 9

Depresses ribs

Question 10

Origin of Splenius capitis?

Answer 10

Nuchal ligament; spinous process of C3-C7

Question 11

Insertion of Splenius Capitis?

Answer 11

Occipital bone (lateral superior nuchal line; mastoid process)

Question 12

Innervation of Splenius Capitis?

Answer 12

SPinal nn. C1-C6 (posterior rami, lateral branches)

Question 13

Action of Splenius Capitis?

Answer 13

Bilaterial: extends cervical spine and head
Unilateral: flexes and rotates head to the same side

Question 14

Origin of SPlenius cervicis?

Answer 14

SPinous processes of T3-T6

Question 15

Insertion of Splenius cervicis?

Answer 15

Transverse process of C1-C2

Question 16

Innervation of splenius cervicis?

Answer 16

Spinal nn. C1-C6 (posterior rami, lateral branches)

Question 17

Action of splenius cervicis?

Answer 17

Bilateral: extends cervical spine and head
Unilateral: flexes and rotates head to the same side

Question 18

Origin of iliocostalis cervicis?

Answer 18

3rd-7th ribs

Question 19

Insertion of Iliocostalis cervicis?

Answer 19

C4-C6 (transverse processes)

Question 20

Innervation of entire Iliocostalis muscle?

Answer 20

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

Question 21

Action of Iliocostalis?

Answer 21

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

Question 22

Origin of Iliocostalis thoracis?

Answer 22

7th-12th ribs

Question 23

Insertion for iliocostalis thoracis?

Answer 23

1st-6th ribs

Question 24

Origin of Iliocostalis lumborum?

Answer 24

Sacrum; iliac crest; thoracolumbar fascia

Question 25

Insertion of Iliocostalis lumborum?

Answer 25

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

Question 26

Origin of the longissimus capitis?

Answer 26

T1-T3 (transverse processes) | C4-C7 (transverse and articular processes)

Question 27

Insertion of longissimus capitis?

Answer 27

Temporal bone (mastoid process)

Question 28

Action of the Longissimus capitis?

Answer 28

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

Question 29

Origin of longissimus cervicis?

Answer 29

T1-T6 (transverse processes)

Question 30

Insertion of longissimus cervicis?

Answer 30

C2-C5 (transverse processes)

Question 31

Origin of longissimus thoracis?

Answer 31

Sacrum; iliac crest; lumbar vertebrae (spinous processes); lower thoracic vertebrae (transverse processes)

Question 32

Innervation of Longissimus?

Answer 32

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

Question 33

Action of longissimus cervicis and thoracis?

Answer 33

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

Question 34

Origin of spinalis cervicis?

Answer 34

C5-T2 (spinous process)

Question 35

Insertion of spinalis cervicis?

Answer 35

C2-C5 (spinous processes)

Question 36

Origin of spinalis thoracis?

Answer 36

T10-L3 (spinous processes, lateral surfaces)

Question 37

Insertion of Spinalis thoracis?

Answer 37

T2-T8 (spinous processes, lateral surfaces)

Question 38

Innervation of spinalis muscle?

Answer 38

Spinal nn. (posterior rami)

Question 39

Action of spinalis muscle?

Answer 39

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