Rotatores

Description

Deep spinal muscles including semispinalis, multifidus, spinalis, longissimus, iliocostalis

Name

• Rotatores
• Rotatores spinae

General

• Present through the entire vertebral column
• Part of the Transversospinalis Muscle Group

Structure

• Present throughout the entire vertebral column
• Deep to multifidus
• Subsegments
  • Rotatores Colli/Cervicis
  • Rotatores Thoracis (most well-developed of the subsegments)
    • Rotatores Longi (Long Rotatores)
    • Rotatores Brevis (Short Rotatores)
  • Rotatores Lumborum

Origin

• Rotatores Longi
  • Superior/Posterior aspect of transverse process of vertebrae T1-T12
• Rotatores Brevis
  • Transverse process of vertebrae T2-T12

Insertion

• Rotatores Longi
  • Spinous process of vertebrae 2 levels above origin
• Rotatores Brevis
  • Spinous process of vertebrae 1 level above origin

Actions

• Bilateral: Extension of spine
• Unilateral: Rotation of spine to opposite side
• Maintain posture

Vascular Supply

• Posterior Intercostal Arteries
• Lumbar Arteries

Innervation

• Spinal nerves (Dorsal Rami)

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Clinical Significance

• Needs to be updated

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See Also

• Physical Exam Back
• Back Anatomy Main
• Back Pain Main

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