THE MUSCLES. 
Fic. 75..-MUSCLES ON THE 
LATERAL SURFACE OF 
THE ARM. 
a, M. ‘supraspinatus; 4, 
part of insertion of M. rhom- 
boideus; ¢, M. infraspinatus; 
d, M. teres major; ¢, M. spi- 
nodeltoideus; 7, M. acromio- 
deltoideus; g, caput longum 
of M. triceps brachii; 2, caput 
laterale of M. triceps brachii; 
z,M. brachialis; 7, M. biceps; 
&, M. brachioradialis; 4, M. 
extensor carpi radialis lon- 
gus; mm, M. extensor com- 
munis digitorum (’, tendon 
of same); #2, M. extensor la- 
teralis digitorum; (#’ tendon 
4 of same); o, M. extensor 
carpi ulnaris (o', tendon of 
same); 2, M. extensor indicis 
proprius; , fifth head of M. 
flexor profundus digitorum; 
r,m. flexor carpi ulnaris. 1, 
vertebral border of the scap- 
ula; 2, spine of the scapula; 
3, greater tuberosity of the 
humerus; 4, olecranon; 5, 
transverse ligament of the 
wrist. 
