Intrinsic Back

Question 1

Iliocostalis

Answer 1

Iliac crest - Ribs

Question 2

Longissimus

Answer 2

Posterior sacrum - TPs of cervical and thoracic vertebrae

Question 3

Spinalis

Answer 3

Spinous process of lumbar - Sps of cervical and thoracic

Question 4

Erector spinae actions and innervation

Answer 4

Bilateral - extend head and vertebral column
Uni lateral - lateral flexion of vertebral column

Posterior Rami of spinal nerve

Question 5

Semi-spinalis

Answer 5

(4-6 segments)
Tps of cervical and thoracic vertebrae - occipital bone and sps of cervical, thoracic

Question 6

Multifidus

Answer 6

TPs of all vertebrae, posterior sacrum - sps(2-4 segments superior)

Question 7

Rotatories

Answer 7

Tps all vertebrae - Sps all vertebrae 1 or 2 segments superior

Question 8

Transversospinals action and innervation

Answer 8

Stabilize vertebral column and lateral flexion of vertebral column

Semi-spinales assists in extension of head

Posterior Rami of spinal nerves

Question 9

Interspinales

Answer 9

SPs vertebrae - sps vertebrae 1 superior

Question 10

Intertransversarii

Answer 10

Tps of vertebrae - tps vertebrae 1 superior

Question 11

levatores costarum

Answer 11

Tps of c7-t11 - ribs

Question 12

Segmental group actions and innervation

Answer 12

Stabilize vertebral column

Posterior rami of spinal nerves (Intertransversarii is posterior and anterior rami)