| A | B |
|---|
| Teres Major & Latissimus Dorsi | Extend, adduct, and medially rotate the G/H joint |
| Deltoid (all fibers) | Abduct the G/H joint |
| Deltoid (anterior fibers) | Flex, medially rotate, and horizontally adduct the G/H joint |
| Deltoid (posterior fibers) | Extend, laterally rotate, and horizontally abduct the G/H joint |
| Rhomboid Major & Rhomboid Minor | Adducts, elevates, and downwardly rotates the S/T joint |
| Serratus Anterior | Abducts & depresses the S/T joint, and holds the medial border of scapula agaist the rib cage |
| Levator Scapula (unilaterally) | Elevates, Downwardly rotates the S/T joint, laterally flexes & rotates the head/neck to same side |
| Triceps Brachii (long head only) | Extends and adducts the G/H joint, Extends the H/U joint |
| Triceps Brachii (all heads) | Extend the H/U joint |
| Levator Scapula & Upper Trapezius fibers (bilaterally) | Extends head and neck |
| Upper Trapezius fibers (unilaterally) | Laterally flex and rotate head/neck to same side, elevate and upwardly rotate S/T joint |
| Middle Trapezius fibers | Adduct and stabilize the S/T joint |
| Lower Trapezius fibers | Depress and Upwardly rotate the S/T joint |
| Subclavius | Draws clavicle inferiorly and anteriorly, elevates first rib, stabilizes the S/C joint |
| Supraspinatus | Abducts the G/H joint and Stabilizes head of humerus in glenoid cavity |
| Infraspinatus & Teres Minor | Laterally rotate, Adducts, Extends, Horizontally abducts the G/H joint, Stabilizes head of humerus in glenoid cavity |
| Pec Minor | Depresses and abducts the S/T joint, tilts the scapula anteriorly, and assists in forced inhalation |
| Subscapularis | Medially rotates the G/H joint, stabilizes head of humerus in glenoid cavity |
| Biceps Brachii | Flexes the H/U joint, Supinates the R/U joint, Flexes the G/H joint |
| Coracobrachialis | Flexes and adducts the G/H joint |
| Pec Major (all fibers) | Adducts & Medially rotates the G/H joint, and elevates thorax in forced inhalation |
| Pec Major (upper fibers) | Flex and horizontally adduct the G/H joint |
| Pec Major (lower fibers) | Extend the G/H joint |
