posterior pectoral girdle

Cards (6)

  • upper trapezius:
    o - Extensive medial attachment from the base of the medial 1/3 of the superior nuchal line and the occipital bone
    Ligamentum nuchae
    Spinous processes of C7 to T12 and the intervening supraspinous ligament
    r - down & laterally
    i - posterior border of the lateral 1/3 of the clavicle
    a - Elevation, retraction and lateral rotation of scapula
    ns - Motor: Spinal part of cranial nerve XI (‘Accessory’ nerve)
    • Sensory: Ventral rami C3, C4
  • middle trapezius:
    o - Extensive medial attachment from the base of the medial 1/3 of the superior nuchal line and the occipital bone
    Ligamentum nuchae
    • Spinous processes of C7 to T12 and the intervening supraspinous ligament
    r - almost horizontally
    i - medial border of the acromion and the upper border of the crest of the scapula spine
    a - retraction of scapula
    ns - Motor: Spinal part of cranial nerve XI (‘Accessory’ nerve)
    Sensory: Ventral rami C3, C4
  • lower trapezius:
    o - Extensive medial attachment from the base of the medial 1/3 of the superior nuchal line and the occipital bone
    Ligamentum nuchae
    Spinous processes of C7 to T12 and the intervening supraspinous ligament
    r - upwards & laterally
    i - converge to form a tendon that attaches to inferior surface of the medial end of the spine of the scapula
    a - depression, retraction & lateral rotation of scapula
    ns - Motor: Spinal part of cranial nerve XI (‘Accessory’ nerve)
    Sensory: Ventral rami C3, C4
  • rhomboid major: lies deep to trapezius
    o - spinous processes of T2 to T5 and the intervening supraspinous ligament
    r - obliquely downwards and laterally
    i - medial border of scapula between the spine of scapula and the inferior angle
    a - scapular retraction and medial rotation
    ns - dorsal scapular nerve c5

    function:
    Scapula stabiliser when other muscles are active
  • rhomboid minor:
    o - from the spinous processes of C7 and T1 and the supraspinous ligament between them
    r -obliquely downwards & laterally
    i - medial border of the scapula at the level of the root of the sine of scapua
    a - scapular retraction & medial rotation
    ns - dorsal scapular nerve c5

    function:
    scapula stabiliser
  • levator scapulae:
    o - transverse processes of c1-c4
    r - downwards & laterally
    i - medial border of the scapula between the superior angle and the base of the spine of scapula
    a - elevation, retraction & medial rotation of scapula
    ns - dorsal scapular nerve c5