Clavicular Head

• O (origin)

  • Smaller head arising from the medial 1/2 of the anterior surface of the clavicle

  A) clavicular head

  
• R (direction)

  • Down and lateral

  A) clavicular head

  
• I (insertions)

  • Via a flat tendon to the lateral lip of the intertubercular groove (covering the long head of biceps tendon)
  • Forms the anterior lamina (layer) which runs to the lower part of the groove

  A) clavicular head

  
• A (actions)

  • Flexes the glenohumeral joint to 90 degrees
  • horizontally flexes
  • adducts
  • medially rotates

  A) clavicular head

  
• NS (nerve supply)

  • Medial pectoral nerve (C8, T1)
  • Lateral pectoral nerve (C5 - C7)

  A) clavicular head