Intrinsic Muscles of the Back

Question 1

What is the origin of the serratus posterior inferior?

Answer 1

T11-L2 (spinous processes)

Question 2

what is the insertion of the serratus posterior superior?

Answer 2

2nd-4th ribs (superior border)

Question 3

what is the insertion of the serratus posterior inferior?

Answer 3

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

Question 4

What is the origin of the serratus posterior superior?

Answer 4

nuchal ligament; C7-T3 (spinous processes)

Question 5

what is the innervation of the serratus posterior superior?

Answer 5

spinal nn T2-T5 (anterior rami)

Question 6

what is the innervation of the serratus posterior inferior?

Answer 6

spinal nn T9-T12 (anterior rami)

Question 7

what is the action of serratus posterior superior?

Answer 7

elevates the ribs

Question 8

what is the action of serratus posterior inferior?

Answer 8

depresses ribs

Question 9

what is the origin of the splenius capitis?

Answer 9

nuchal ligament; C3-C7 (spinous processes)

Question 10

what is the origin of the splenius cervicis?

Answer 10

T3-T6 (spinous processes)

Question 11

what is the insertion of the splenius capitis?

Answer 11

occipital bone (lateral superior nuchal line; mastoid process)

Question 12

what is the insertion of the splenius cervicis?

Answer 12

C1-C2 (transverse processes)

Question 13

what is the innervation of the splenius capitis?

Answer 13

spinal nn C10C6 (posterior rami, lateral branches)

Question 14

what is the innervation of the splenius cervicis?

Answer 14

spinal nn C10C6 (posterior rami, lateral branches)

Question 15

What is the action of the splenius capitis?

Answer 15

bilateral - extends cervical spine and head

unilateral - flexes and rotates head to the same side

Question 16

what is the action of the splenius cervicis?

Answer 16

bilateral - extends cervical spine and head

unilateral - flexes and rotates head to the same side

Question 17

what is the origin of the iliocostalis cervicis?

Answer 17

3rd-7th ribs

Question 18

what is the origin of the iliocostalis thoracis?

Answer 18

7th-12th ribs

Question 19

what is the origin of the iliocostalis lumborum?

Answer 19

sacrum, iliac crest, thoracolumbar fascia

Question 20

what is the insertion of the iliocostalis cervicis?

Answer 20

C4-C6 (transverse processes)

Question 21

what is the insertion of the iliocostalis thoracis?

Answer 21

1st-6th ribs

Question 22

what is the insertion of the iliocostalis lumborum?

Answer 22

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

Question 23

what is the innervation of the iliocostalis cervicis?

Answer 23

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

Question 24

what is the innervation of the iliocostalis thoracis?

Answer 24

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

Question 25

what is the innervation of the iliocostalis lumborum?

Answer 25

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

Question 26

what is the action of the iliocostalis cervicis?

Answer 26

bilateral - extends spine | unilateral - bends spine laterally to the same side

Question 27

what is the action of the iliocostalis thoracis?

Answer 27

bilateral - extends spine | unilateral - bends spine laterally to the same side

Question 28

what is the action of the iliocostalis lumborum?

Answer 28

bilateral - extends spine | unilateral - bends spine laterally to the same side

Question 29

what is the origin of the longissimus capitis?

Answer 29

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

Question 30

what is the origin of the longissimus cervicis?

Answer 30

T1-T6 (transverse processes)

Question 31

what is the origin of the longissimus thoracis?

Answer 31

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

Question 32

what is the insertion of the longissimus capitis?

Answer 32

temporal bone (mastoid process)

Question 33

what is the insertion of the longissimus cervicis?

Answer 33

C2-C5 (spinous processes)

Question 34

what is the insertion of the longissimus thoracis?

Answer 34

2nd-12th ribs; lumbar vertebrae (costal processes); thoracic vertebrae (transverse processes)

Question 35

what is the innervation of the longissimus capitis?

Answer 35

Spinal nn. C1-C5 (posterior rami, lateral branches)

Question 36

what is the innervation of the longissimus cervicis?

Answer 36

Spinal nn. C1-C5 (posterior rami, lateral branches)

Question 37

what is the innervation of the longissimus thoracis?

Answer 37

Spinal nn. C1-C5 (posterior rami, lateral branches)

Question 38

what is the action of the longissimus capitis?

Answer 38

bilateral - extends head | unilateral - flexes and rotates head to the same side

Question 39

what is the action of the longissimus cervicis?

Answer 39

bilateral - extends spine | unilateral - bends spine laterally to the same side

Question 40

what is the action of the longissimus thoracis?

Answer 40

bilateral - extends spine | unilateral - bends spine laterally to the same side

Question 41

what is the origin of the spinalis cervicis?

Answer 41

C5-T12 (spinous processes)

Question 42

what is the origin of the spinalis thoracis?

Answer 42

T10-L3 (spinous process, lateral surfaces)

Question 43

what is the insertion of the spinalis cervicis?

Answer 43

C2-C5 (spinous processes)

Question 44

what is the insertion of the spinalis thoracis?

Answer 44

T2-T8 (spinous processes, lateral surfaces)

Question 45

what is the innervation of the spinalis cervicis?

Answer 45

spinal nn (posterior rami)

Question 46

what is the innervation of the spinalis thoracis?

Answer 46

spinal nn (posterior rami)

Question 47

what is the action of the spinalis cervicis?

Answer 47

bilateral - extends cervical and thoracic spine | unilateral - bends cervical and thoracic spine to the same side

Question 48

what is the action of the spinales thoracis?

Answer 48

bilateral - extends cervical and thoracic spine | unilateral - bends cervical and thoracic spine to the same side