Erector Spinae (Sacrospinalis)

Question 1

Which muscles are identified as erector spine or sacrospinalis muslces?

Answer 1

Iliocostalis
Longissimus
Spinalis

Question 2

What is the innervation of the iliocostalis lumborum?

Answer 2

Dorsal Rami of Lower Thoracic and all Lumbar Spinal Nerves

Question 3

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

Answer 3

None

Question 4

What is the insertion for the iliocostalis thoracis?

Answer 4

Costal Angles of the upper 6-7 ribs

Transverse process of C7

Question 5

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

Answer 5

Accessory process and Transverse Processes of L1-L5
Spinous processes of L3-L5
Median Sacral Crest of S1-S3

Question 6

What is the innervation of the longissimus cervicis?

Answer 6

Dorsal Rami of C4-C8 and T1-T2 Spinal Nerves (C4-C8 & T1-T2 cord levels)

Question 7

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

Answer 7

Spinous Processes of T11, T12-L1, L2