Actions Flashcards
Flexion
-110deg from neutral (>110deg=ext through flex to 180deg)
Deltoid (and ant fibres)
Pectoralis Major (clavicular head)
Biceps Brachii- weak
Limited by- antagonist tension
Extension
-50-70deg from neutral
Deltoid (post fibres) Teres Major Latissimus Dorsi Pectoralis Major (sternocostal head)- only from flex to neutral Long head Triceps
Limited by- antagonist tension
Abduction
-100-120deg (>120deg=elevation through abd to 180deg)
Deltoid (middle fibres)
Supraspinatus- initiates
Limited by- antagonist tension
Adduction
-30-40deg
Pectoralis Major
Latissimus Dorsi- against R
Teres Major
Coracobrachialis
Limited by- side of body
Medial Rotation
-±90deg
Subscapularis Pectoralis Major Latissimus Dorsi Deltoid (ant fibres) Teres Major
Limited by- antagonist tension
Lateral Rotation
-80deg
Infraspinatus
Teres Minor
Deltoid (post fibres)- prime mover
Limited by- antagonist tension
Elevation
Scapulohumeral rhythm - movement at GH and scapulothoracic jts
From 0-30deg = pure GH movement
From 30-180deg = 2:1 humeral abd: scapula lat rotation
Circumduction
=combination of all other movements