External rotation (or lateral rotation) is rotation away from the center of the body.
The muscles of external rotation include:
fibrous: Gomphosis · Suture · Syndesmosis · Interosseous membrane
cartilaginous: Synchondrosis · Symphysis
synovial: Plane joint · 1° (Hinge joint, Pivot joint) · 2° (Condyloid joint, Saddle joint) · 3° (Ball and socket joint)
general: Flexion/Extension · Adduction/Abduction · Internal rotation/External rotation · Elevation/Depression
specialized/upper limbs: Protraction/Retraction · Supination/Pronation
capsular: Articular capsule (Synovial membrane, Fibrous membrane) · Synovial fluid · Synovial bursa · Articular disk/Meniscus