sometimes affect the metacarpals and the phalanges, tuberculosis and syphilis. Both cause swelling of the bones.
Muscles of the Forearm.—The chief groups of muscles on the forearm are the flexors and pronators on the anterior surface and the extensors and supinators on the posterior surface. In general the flexors and pronators take their origin from on or around the internal condyle, while the extensors and supinators arise on or around the external condyle. Where not otherwise stated it will be understood that such is their origin. In a general way they may by grouped as follows:
Anterior Surface.
{ flexor carpi radialis
Flexors of wrist { flexor carpi ulnaris
{ palmaris longus
Flexors of fingers { flexor sublimis digitorum
{ flexor profundus digitorum
Flexor of thumb flexor longus pollicis
Pronator of hand { pronator radii teres
{ pronator quadratus
Posterior Surface.
Extensor of forearm anconeus
{ extensor carpi radialis longior
Extensors of wrist { extensor carpi radialis brevior
{ extensor carpi ulnaris
{ extensor ossis metacarpi pollicis
Extensors of thumb { extensor primi internodii pollicis
{ extensor secundi internodii pollicis
Extensor of fingers extensor communis digitorum
Extensor of index finger extensor indicis
Extensor of little finger extensor minimi digiti
Supinators of hand { supinator longus
{ supinator brevis
