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Multifidus

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Origin

  • Sacrum
  • Posterior superior iliac spine
  • Mammillary process of lumbar vertebrae
  • Transverse process of thoracic vertebrae
  • Articular process of vertebrae C4-C7

Insertion

  • Spinous process (base) of vertebrae C2-L5 (inserts 2-4 levels above the origin)

Actions

  • Bilateral: Extension of trunk
  • Unilateral: Rotation of trunk to opposite side
  • Provides proprioceptive feedback

Vascular Supply

  • Occipital Artery (Muscular branches)
  • Deep Cervical Artery
  • Posterior Intercostal Arteries
  • Subcostal Arteries
  • Lumbar Arteries
  • Sacral Arteries

Nerve

  • Spinal nerves C1-L5 (Dorsal Rami)

Clinical Significance

  • Dysfunction of this muscle (e.g. weakness, atrophy) is one of the more common causes of chronic low back pain

See Also


References


Created by:
Chris Hauglid on 20 April 2020 09:12:29
Authors:
Last edited:
26 May 2020 00:29:15
Category: