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External Obliques

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.
  • Linea alba.

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

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