Horizontal Abduction

Shoulders Elevate

    Overactive
  • Upper Trapezius - cervical extension, lateral flexion and rotation; scapular elevation.
  • Upper Trapezius
  • Levator Scapulae - cervical extension, lateral flexion and ipsilateral rotation when the scapulae is anchored. Assists in elevation and downward rotation of the scapulae.
  • Levator Scapulae
    Underactive
  • Supraspinatus - abduction of the arm.
  • Supraspinatus
  • Infraspinatus - shoulder external rotation.
  • Infraspinatus
  • Teres Minor - shoulder external rotation.
  • Teres Minor
  • Subscapularis - shoulder internal rotation.
  • Subscapularis
  • Rhomboids - produces scapular retraction and downward rotation.
  • Rhomboids
  • Middle Trapezius - scapular retraction.
  • Middle Trapezius
  • Lower Trapezius - scapular depression.
  • Lower Trapezius

Shoulders Protract

    Overactive
  • Pectoralis Major - shoulder flexion (clavicular fibers), horizontal adduction, and internal rotation.
  • Pectoralis Major
  • Pectoralis Minor - protracts the scapula.
  • Pectoralis Minor
    Underactive
  • Supraspinatus - abduction of the arm.
  • Supraspinatus
  • Infraspinatus - shoulder external rotation.
  • Infraspinatus
  • Teres Minor - shoulder external rotation.
  • Teres Minor
  • Subscapularis - shoulder internal rotation.
  • Subscapularis
  • Rhomboids - produces scapular retraction and downward rotation.
  • Rhomboids
  • Middle Trapezius - scapular retraction.
  • Middle Trapezius
  • Lower Trapezius - scapular depression.
  • Lower Trapezius

Elbows Flex

    Overactive
  • Biceps Brachii-Long Head - elbow flexion, supination of the radioulnar joint, shoulder flexion.
  • Biceps Brachii-Long Head
      Underactive
    • Triceps Brachii-Long Head - elbow extension, shoulder extension.
    • Triceps Brachii-Long Head
    • Supraspinatus - abduction of the arm.
    • Supraspinatus
    • Infraspinatus - shoulder external rotation.
    • Infraspinatus
    • Teres Minor - shoulder external rotation.
    • Teres Minor
    • Subscapularis - shoulder internal rotation.
    • Subscapularis