254 



ANATOMICAL TECHNOLOGY. 



Biceps ( 691). After transection, the distal part of this was left in place ; the proximal 

 part is hidden, but appears in Fig. 75. 



Brachialis ( 692). The somewhat thin ectal margin of this flexor of the antebrachium 

 gives no adequate idea of its size and the extent of its origin area (Fig. 68). 



Extensor digitorum communis ( 697). 

 The origin areas of this and of the ex. minimi 

 ( 698) and ex. ulnaris (% 699) are closely 

 grouped on the epicondylus, and their bodies 

 form a compact mass. 



Extensor (carpi) radialis longior ( 694) and 

 ex. radialis tremor ( 693). The name is 

 written upon the body of the former, but the 

 latter is only partially visible, and its name is 

 written along the side of the supinator longus. 



Flexor ulnaris ( 702). The name is writ- 

 ten along the side of the muscle. 



Meditriceps The " long, middle or scapu- 

 lar head of the triceps " ( 682). The tendon 

 of this strong muscle is comparatively small 

 and is partly hidden by the micostalis (here 

 called teres minor). The body of the muscle 

 is also partly hidden by the ectotriceps. 



Micostalis "Teres minor" ( 679). In 

 the undissected arm this insignificant muscle 

 is hidden by the acromio-deltoideus and spino- 

 deltoideus. 



Spino deltoideus ( 674). See acromio-del- 

 toideus above. 



Supinator longus ( 690). The M. of the 

 name rests upon the proximal end of this mus- 

 cle, which is seen to emerge between the MM. 

 biceps and brachialis. 



Teres minor Micostalis. See above. 



M. SUPRASPINATUS. 



673. Synonymy. The human supra- 

 spinatus, G., A, 405, Q., A, I, 200 ; " sits-epi- 

 neux" S. -D , A, II, 336 ; " sus-epineux, Ch., 



Al 265; 8U P ras P inatus > Cb - (F 1 -). A, 251; 

 supraspinatus, Miv., B, 148. 



FIG. 74. THE CEPHALIC ASPECT OF THE Figures. Ectal aspect (67, 74) ; part of 

 LEFT ARM, WITH THE ECTAL Mus- ental aspect (73, 75) ; origin area (44) ; inser- 

 CLES OF THE SCAPULA. tion area (68, 69, 70). 



Posture. Similar to that for the dissection of the subscapularis, 

 excepting that the arm should rest upon the caudal (inner) side, 

 and the mesoscapula should be toward the observer. 



Dissection. Note that the ectal surface of the muscle is cov- 



