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Muscle Name: Multifidus

Medical Name:

• Multifidus

Other Names:

• None

Head:

• None (Single muscle)

Movement:

• Extension of the vertebral column (bilateral contraction)
  • Straightening the spine
• Lateral flexion of the vertebral column (unilateral contraction)
  • Bending the spine to the side
• Rotation of the vertebral column (unilateral contraction)
  • Rotating the spine to the opposite side
• Stabilization of the vertebral column
  • Maintaining posture and alignment

Attachment:

• Origin:
  • Posterior sacrum
  • Posterior superior iliac spine (PSIS)
  • Mammillary processes of lumbar vertebrae
  • Transverse processes of thoracic vertebrae
  • Articular processes of C4-C7 vertebrae
• Insertion:
  • Spinous processes of all vertebrae except C1
  • Each muscle segment spans 2-4 vertebrae

Related Muscles:

• Erector Spinae
• Rotatores
• Semispinalis
• Quadratus Lumborum
• Interspinales
• Intertransversarii

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