# What is the six-pack muscle called?

The the six-pack muscle is called the rectus abdominis. Gray's Anatomy (1918) describes it as a long, flat muscle running down the front of the abdomen.

## What it means

- A long, flat muscle running down the front of the abdomen.
- Divided by three horizontal fibrous bands (tendinous intersections) into the visible 'six-pack' segments.
- Bends the trunk forward.

## Action steps

1. From the front of the pubis up to the lower ribs and sternum.
2. On either side of the midline.
3. Enclosed in a fibrous sheath formed by the aponeuroses of the flank muscles.

## Sources

- [Gray's Anatomy of the Human Body (1918)](https://www.bartleby.com/107/)

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