Vertebral column

Origin: Superior surface of pubis around symphysis

Insertion: Inferior surfaces of costal cartilages R5-R7 and ziphoid process

Action: Depresses ribs, flexes vertebral column, compresses abdomen

Origin: Spinous processes of inferior thoracic and superior lumbar vertebrae

Insertion: Spinous processes of superior thoracic vertebrae

Action: Extends vertebral column

Origin: Broad apneurosis and transverse processes of inferior thoracic and superior lumbar vertebrae; joins iliocostalis

Insertion: Transvers processes of superior vertebrae and inferior surfaces of ribs

Action: Extends vertebral column; alone, each produces lateral flexion to that side

Origin: Superior borders of inferior seven ribs medial to the angles

Insertion: Upper ribs and transverse process of last cervical vertebra

Action: Stabilizes thoracic vertebrae in extension

Origin: Sacrum and transverse processes of each vertebra

Insertion: Spinous processes of the 3rd and 4th more superior vertebrae

Action: Extends vertebral columns and rotates toward opposite side

Origin: Iliac crest and iliolumbar ligament

Insertion: Last rib and transverse processes of lumbar vertebrae

Action: Depress ribs; alone, each side laterally flexes vertberal column