Spinal 3 Erector Spinae (sacrospinals)

Question 1

What is the innervation of the iliocostalis lumborum?

Answer 1

dorsal rami of lower thoracic and all lumbar spinal nerves

Question 2

What osseous parts of the vertebral column serve as an origin to the iliocostalis thoracis?

Answer 2

none

Question 3

What is the insertion for the iliocostalis thoracis?

Answer 3

costal angles of the upper 6-7 ribs, transverse process of C7

Question 4

What osseous parts of the vertebral column serve as an origin to the longissimus thoracis?

Answer 4

accessory process & transverse processes of L1-L5, spinous processes of L3-L5 and median sacral crest S1-S3

Question 5

What is the innervation of the longissimus cervicis?

Answer 5

dorsal rami of C4-C8 and T1-T2 spinal nerves (C4-C8 & T1-T2 cord levels)

Question 6

What osseous parts of the vertebral column serve as an origin to the spinalis thoracis?

Answer 6

spinous processes of T11 & T12-L1 & L2

Question 7

Which muscles are identified as erector spinae or sacrospinalis muscles?

Answer 7

iliocostalis, longissimus, spinalis