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. 



BrachiaKs (§ 693). — The somewhat thin ectal margin of this flexor of the amtebrachiTun 

 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 lomgior (§ 694) and 

 ex. radialis hremor (§ 698). — 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 

 caUed 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 aeromio-deltoideus and spino- 

 deltoideus. 



Spino- deltoideus (§ 674). — See aeromio-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 minoi — Micostalis. — See above. 



M. SUPEASPINATUS. 



§ 673. Synonymy. — The human supra, 

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

 neux," 8.-1) , A, II, 336; " siis-epineux, Ch., 

 A, 265; supraspinatus, Ch. (Fl.), A, 2.51; 

 supraspinatus, Miv., B, 148. 



Figures. — Ectal aspect (67, 74) ; part of 

 ental aspect (73, 75) ; origin area (44) ; inser- 

 tion area (68, 69, 70). 



Fig. 74. — The Cephalic Aspect of the 

 Left Akm, with the Ectal Mus- 

 cles OF THE Scapula. 



Posture. — Similar to that for the dissection of the suhscapularis, 

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

 and the mesoscapula should he toward the observer. 



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



