Iliocostalis Muscles (Cervicis, Thoracis, and Lumborum)

Question 1

Illiocostalis Muscles (ORIGIN)

Answer 1

Iliocostalis cervicis: Angles of the 3rd to 6th ribs

Iliocostalis thoracis: Angles of the 7th to 12th ribs

Iliocostalis lumborum: Iliac crest, sacrum, thoracolumbar fascia

Question 2

Illiocostalis Muscles (INSERTION)

Answer 2

Iliocostalis cervicis: Transverse processes of C4-C6

Iliocostalis thoracis: Angles of the upper six ribs and transverse process of C7

Iliocostalis lumborum: Angles of the lower six ribs

Question 3

Illiocostalis Muscles (INNERVATION)

Answer 3

Dorsal rami of spinal nerves

Question 4

Illiocostalis Muscles (BLOOD SUPPLY)

Answer 4

Iliocostalis cervicis: Occipital artery

Iliocostalis thoracis: Posterior intercostal arteries

Iliocostalis lumborum: Lumbar arteries

Question 5

Illiocostalis Muscles (ACTION)

Answer 5

Extends and laterally flexes the vertebral column.
Helps in posture maintenance.