deep back

Question 1

what intermediate extrinsic back muscle lies deep to the rhomboids

Answer 1

serratus posterior superior

Question 2

what intermediate extrinsic muscle lies deep to the latissimus dorsi

Answer 2

serratus posterior inferior

Question 3

Serratus posterior superior origin

Answer 3

spinous processes (high Cs to low Ts ~C7 - T2)

Question 4

Serratus posterior inferior origin

Answer 4

spinous processes (high Ts to Low Ls ~T11 - L2)

Question 5

action of the serratus posterior (SI)

Answer 5

role in respiration? and Propioceptive function?

Question 6

two splenius

Answer 6

splenius capitus and cervicis

Question 7

splenius origin

Answer 7

SP ~C3-T6

Question 8

Insertion of splenius capitus

Answer 8

mastoid process or base of skull

Question 9

insertion of splenius cervicis

Answer 9

TP of cervical ~ C1-C3

Question 10

action of splenius

Answer 10

lateral flextion of neck
rotate head
extend head and neck

Question 11

innervation of splenius

Answer 11

posterior rami of spinal nerves

Question 12

erector spinae group from medial to lateral

Answer 12

spinalis, longissimmus, iliocostalis

Question 13

erector spinae origin

Answer 13

• spinous processes (lumbar vertebrae)
• sacrum
• iliac crest

Question 14

action of erector spinae

Answer 14

extend vertebral column
lateral flextion of vertebral column

Question 15

3 muscles of the transversopinales

Answer 15

semispinales
multifidus
rotatores

Question 16

action of the transversospinales

Answer 16

extend vertebral column
rotate vertebral column
stabilize vertebral column
(rotatores: proprioception)

Question 17

Semispinalis length

Answer 17

4-6 segments

Question 18

multifidus length

Answer 18

2-4 segments

Question 19

rotatores length

Answer 19

1-2 segments

Question 20

where would you expect to find the semispinalis

Answer 20

cervical and thoracic portion of the vertebrae

Question 21

which transversospinales is the deepest

Answer 21

rotatores

Question 22

what is the only transversospinales

Answer 22

that you would locate at the section of the lumbar

Question 23

the three muscles of the segmental muscle group

Answer 23

interspinales
intertransversarii
levator costarum

Question 24

the actions of the segmental muscle group

Answer 24

is extend vertebral column
laterally flex/rotate vertebral column
elevate ribs in respiration