How Does Iliocostalis Anatomy: Origin, Insertion & Action Work?

The iliocostalis is like a strong rope that helps your back move when you twist or bend.

Imagine your back is made up of many strings. The iliocostalis is one of those strings, and it runs from the bottom part of your hip all the way up to your rib cage, almost like a ladder stretching from your pants to your shirt.

Origin means where the rope starts. For the iliocostalis, that’s near your hip bone, kind of like where your shoelace starts at your shoe.

Insertion is where the rope ends. In this case, it ends on your ribs, like how a shoelace ends at the top of your shoe.

Action means what happens when you pull the rope. When the iliocostalis tightens or pulls, it helps you bend sideways, just like how you lean to one side when you're playing tag and trying to dodge the other player. It also helps you twist your body, like when you spin around before throwing a ball.