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Rhomboideus

Contents

ANATOMY

Rhomboideus - posterior view
Rhomboideus - posterolateral view
Rhomboideus - posterior symmetry

Position

  • Deep compared to the Trapezius
  • Superficial compared to the Splenius Capitis and Cervicis, Serratus Posterior Superior and the Erector Spinae group

Origin

  • Rhomboideus minor
    • Processus spinosi C7-Th1
  • Rhomboideus major
    • Processus spinosi Th2-Th5

Insertion

  • Margo mediale scapulae (from the root of the spina scapula towards the angulus inferiorscapulae)

Main function

  • Scapula
    • Retraction/adduction
    • Elevation

Secondary function

  • Scapula: Downward rotation
  • Trunk: Contralateral rotation (when the scapula is fixated)

Nerve innervation

  • Segmental: C4-C5
  • Peripheral: Dorsal scapular nerve

Arterial supply

  • Dorsal scapular artery

Referred pain pattern

Rhomboideus - pain pattern

Muscle type

  • Phasic
    • Weakens during dysfunction

Symptoms

  • Round shouldered posture
  • Problems reaching forward or stretching down
  • Crepitation sounds when moving scapula

Muscular attachments

Videos

Short version

Detailed version

Myofascial lines

Deep dorsal arm line

Spiral line

Synergists

Retraction

  • Trapezius
  • Levator Scapulae

Elevation

  • Trapezius (upper)
  • Levator Scapulae
  • Serratus Anterior
  • Pectoralis Major

Antagonists

Protraction scapula

  • Serratus Anterior
  • Pectoralis Minor
  • Pectoralis Major

Depression scapula

  • Trapezius (nedre)
  • Pectoralis Minor
  • Latissimus Dorsi
  • Pectoralis Major
  • Serratus Anterior