The obliques wrap around the trunk on each side to form our waists and join to the linea alba, a band of connective tissue running down the front of the abdomen. They help us to side bend and rotate the body.
Origin - Lowest 8 ribs.
Insertion - Front 1/2 of the iliac crest.
Actions - Contraction of one side alone laterally bends the trunk to that side and rotates the trunk to the other side.
Compresses the abdomen and supports the abdominal viscera.
Innervation - Ventral rami of thoracic nerves.
Daily uses - Raking leaves.
Example exercises - Twisting crunches.