MUSCLES OF THE THORACIC LIMB 



321 



The supraspinatus ends chiefly on the external tu})erosity of the humerus, but 

 has a small attachment to the internal tuberosity also. 



Th(> infraspinatus is inserted into the outer surface of the external tuberosity 

 of the humerus. 



Siihscapularis 



Teres major - ^ V\ 



I 4 Suprusjnruilus 



La(issi)nus dorsi .„~" ""■ \ 'ft Pn 



\ ' /'^i" Coraco-lmicliialis 

 Long licdil of triceps I 7" / ' i , i i- , ■ 



■1-^-4 / y /■ -r -- - Accessory head of triceps 



Tensor fascia' a)i.tibracJtii 



/ ', - Biceps hracldi 



, / 



'/ Mf 

 Internal Jtcad of triceps —£i»..l, , ,,. 



r f y ii/,, ^ 



Humerus 



m 



Flexor carpi medius .l|[|'i \ i \^ |1| -^ -- Extensor carpi radialii 



Flexor carpi intern us »^\l.\T"~"'- — Pronator teres 



Superficial digital flexor --*.„_\ \ v i 



Deep digital flexor ^ .ll\. _vA i U ~^' Radius 



.% V~.u. , Radial head of deep 



digital flexor 



%f 



f 



Ftg. 2.'?2.— Muscles of Thoracic Limb of Dog, Intfrnai. Vii:w. (Ellenberger-Baum, Anat. des Himdes.) 



The teres minor arises on a tubercle on the posterior border of the scapula, 

 just above the olenoid cavity, and is inserted into the deltoid ridge. 



The subscapularis is wide and is somewhat multipennate in structure, being 

 intersected by fil)rous septa which are attached to the rough lines on the costal 

 surface of the scapula. 

 21 



