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Home > Anatomy & Physiology > Muscles > Erector Spinae

Erector Spinae

The erector spinae (sometimes known as sacrospinalis) is often described as a group of different muscles called iliocostalis, longissimus and spinalis.

Origin

  • Posterior crest of the ilium
  • Lower posterior surface of the sacrum
  • Lower 7 ribs
  • Spinous processes of T9-L5
  • Transverse processes of T1-12

Insertion

  • Angles of the ribs
  • Transverse processes of all vertebrae
  • Base of the skull

Actions

  • Extension of the spine
  • Lateral flexion (side-bending) of the spine
  • Maintains correct curvature of the spine

Innervation

  • Dorsal rami of cervical, thoracic and lumbar spinal nerves

Daily uses

  • Maintaining good posture

How can I strengthen it?

How can I stretch it?

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