Muscle | Origin | Insertion | Function |
1st Layer/ M. Extensor digitorum | Epicondylus lateralis humeri | Basis phalangis mediae II-V; Basis phalangis distalis II-V | Extensio digitorum; Extensio manus |
1st Layer/ M. Extensor digiti minimi | Epicondylus lateralis humeri | Basis phalangis mediae V; Basis phalangis distalis V | Extensio digiti minimi |
1st Layer/ M. Extensor carpi ulnaris | Epicondylus lateralis humeri; Olecranon; Facies posterior ulnae | Basis ossis metacarpalis V | Extensio manus; Adductio manus |
2nd Layer/ M. Abductor pollicis longus | Facies posterior ulnae et radii; Membrana interossea antebrachii | Basis ossis metacarpalis I | Abductio pollicis |
2nd Layer/ M. Extensor pollicis brevis | Facies posterior radii; Membrana interossea antebrachii | Basis phalangis proximalis pollicis | Extensio phalangis proximalis pollicis |
2nd Layer/ M. Extensor pollicis longus | Facies posterior ulnae; Membrana interossea antebrachii | Basis phalangis distalis pollicis | Extensio pollicis |
2nd Layer/ M. Extensor indicis | Facies posterior ulnae; Membrana interossea antebrachii | Basis phalangis mediae indicis; Basis phalangis distalis indicis | Extensio indicis |
2nd Layer/ M. Supinator | Epicondylus lateralis humeri; Ulna; Lig. collaterale radiale | Facies laterale radii | Supinatio antebrachii |