Intertransversarii Muscles

Description

Image courtesy of elsevier.com</ref>

Illustration of intertransversarii

Muscles of the back. Intertransversarii is illustrated in the zoomed in picture

Name

• Intertransversarii
• Intertransverse Muscles
• Mm. Intertransversarii
• Musculi Intertransversarii

General

• Small deep muscles located between transverse processes of adjacent vertebrae
• They help stabilize the spine and contribute to side bending unilaterally

Structure

• Present throughout the entire vertebral column
• Subsegments
  • Cervical
    • Anterior Intertransversarii
    • Posterior Intertransversarii
  • Thoracic
    • Thoracic Intertransversarii
  • Lumbar
    • Lateral Lumbar Intertransversarii
    • Medial Lumbar Intertransversarii

Origin

• Anterior/Posterior Intertransversarii
  • Anterior & posterior tubercle, respectively, of transverse process of vertebrae C2-T1
• Thoracic Intertransversarii
  • Transverse process of vertebrae T11-L1
• Lateral Lumbar Intertransversarii
  • Transverse process of vertebrae L2-L5
• Medial Lumbar Intertransversarii
  • Accessory process of vertebrae L2-L5

Insertion

• Anterior/Posterior Intertransversarii
  • Anterior & posterior tubercle, respectively, of transverse process of vertebrae C1-C7
• Thoracic Intertransversarii
  • Transverse process of vertebrae T10-T12
• Lateral Lumbar Intertransversarii
  • Transverse process of vertebrae L1-L4
• Medial Lumbar Intertransversarii
  • Mammillary process of vertebrae L1-L4

Actions

• Bilateral: Stabilization of spine
• Unilateral: Sidebending of spine to same side

Vascular Supply

• Occipital Artery
• Deep Cervical Artery
• Ascending Cervical Artery
• Vertebral Arteries
• Lumbar Arteries

Innervation

• Cervical
  • Spinal Nerves (Ventral Rami)
• Thoracic
  • Spinal Nerves (Dorsal Rami)
• Lumbar
  • Spinal Nerves (Ventral Rami - Lateral, Dorsal Rami - Medial)

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Clinical Significance

• Needs to be updated

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See Also

• Physical Exam Neck
• Neck Anatomy (Main)
• Neck Pain (Main)

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