| A | B |
|---|
| Brachialis | Distal ½ of anterior surface of humerus |
| Brachioradialis | Proximal 2/3 of the lateral supracondylar ridge of humerus |
| Extensor Carpi Radialis Longus | Distal 1/3 of the lateral supracondylar ridge of humerus |
| Extensor Carpi Radialis Brevis; Extensor Carpi Ulnaris; Extensor Digitorum; | Common extensor tendon from the lateral epicondyle of humerus |
| Anconeus; Supinator | Lateral epicondyle of humerus |
| Extensor Indicis | Interosseous membrane, Posterior surface of distal shaft of ulna |
| Flexor Carpi Radialis; Palmaris Longus; Flexor Carpi Ulnaris (humeral head); Flexor Digitorum Superficialis; Pronator Teres | Common flexor tendon from medial epicondyle of humerus |
| Flexor Carpi Ulnaris (ulnar head) | Posterior surface of proximal 2/3 of ulna |
| Flexor Digitorum Superficialis | Common flexor tendon from medial epicondyle of humerus, Ulnar collateral ligament, Coronoid process of ulna, Interosseous membrane, Proximal shaft of radius, |
| Flexor Digitorum Superficialis; Pronator Teres | Coronoid process of ulna |
| Extensor Indicis; Flexor Digitorum Superficialis | Interosseous membrane |
| Flexor Digitorum Profundus | Anterior and medial surfaces of proximal ¾ of ulna |
| Pronator Quadratus | Medial, anterior surface of distal ulna |
| Supinator | Radial collateral ligament, annular ligament, supinator crest of the ulna, lateral epicondyle of humerus |
| Pronator Teres | Common flexor tendon from medial epicondyle of humerus, Coronoid process of ulna |
