296 



ELEMENTAR Y ANA TOMY. 



[LESS. 



The anconeus is a very small triangular muscle which goes 

 from the outer condyle of the humerus to the radial aspect of 

 the olecranon. 



The extensor communis digitorum stretches the fingers. 

 Springing from the fibrous membrane which invests its fleshy 

 mass, and from the outer condyle, it divides into four tendons, 



FIG. 272. DEEPER FLEXOR MUSCLES 

 OF RIGHT FORE-ARM. 



i, extensor carpi radialis brevior; 2, 

 supinator brevis ; 3, flexor profundus 

 digitorum ; 4, one of the lumbricales; 

 5, flexor longus pollicis ; 6, pronator 

 quadratus; 7, flexor brevis pollicis; 

 8, opponens pollicis ; 9, adductor 

 pollicis ; 10, origin of the adductor 

 minimi digid ; n, opponens digiti 

 minimi. 



FIG. 273. SUTERFICIAL EXTENSOR 

 MUSCLES OF RIGHT FORE-ARM. 



i, supinator longus ; 2, extensor carpi 

 radialis longior ; 3, extensor carpi 

 radialis brevior ; 4, extensor ossis 

 metacarpi pollicis ; 5, extensor primi 

 internodii pollicis ; 6, extensor se- 

 cundi internodii pollicis ; 7, extensor 

 communis digitorum ; 8, extensor pro- 

 priusdigiti minimi ; 9, extensor carpi 

 ulnaris ; 10, anconeus ; n, brachialis 

 anticus ; 12, triceps; 13, flexor carpi 

 ulnaris. 



which are respectively inserted into the second and last 

 phalanges of each of the four fingers. A more or less sepa- 

 rate part, sending an additional tendon to the fifth digit, 

 is reckoned as a distinct muscle and called the extensor 

 minimi digiti. 



