

////: MI x, i ES, 



Fig. 11!'. StriK-htr, ,,,! Midclnn- ///.--. Tlie first 



portion is generally paler tlmn the second, 

 and is composed of longitudinal llrshy 111 >n s 

 deeply intersected by tendinous strips. It 

 takes its origin, by its superior extremity, 

 from the dorsal angle of the scapula. The 

 anterior portion is deeper-coloured and moiv 

 tendinous than the other. Its superior ex- 

 ircmity, included within two fibrous folds 

 resulting from the duplicature of the scapular 

 aponeurosis, is fixed, through the medium of 

 these, to the tuberosity of the scapula r spine. 



These two muscular bodies unite in- 

 fcriorly, and terminate together on the del- 

 toid imprint or subtrochiterian crest by 

 tendinous and muscular fasciculi. 



Relations. This muscle responds : out- 

 wardly, to the scapular aponeurosis, with 

 which it may be said to form one body ; 

 inwardly, to the subspinatus, the short ab- 

 ductor of the arm, and the largo and short 

 extensors of the fore-arm. 



Action. It gives a very marked abduc- 

 tion movement to the humerus, and also 

 makes it pivot outwards. It acts, besides, 

 as a flexor of that bone, when its action is 

 combined with that of the adductor of the 

 arm. It should also be considered as a 

 powerful tensor of the scapular aponeurosis. 



3. Short Abductor of the Arm, or Tcres 

 Minor. (Fig. 85, 2, 3.) 



Synonyms. Scnpulo-humeralis minor film nl. 

 ( Teres minor Percivall. Scapuh-trodiiterius, 

 medium and parvum Leyh.) 



Volume Situation Direction. A small 

 elongated muscle, situated below the pre- 

 ceding and the subspinatus, along the pos- 

 terior border of the scapula, whoso direction 

 it follows. 



Form Structure. In its inferior half it 



1, 1, Long abductor of the arm; 1', Its humeral 

 insertion; 2, Supcrspinatus; '>, Sabspinatw j 

 3', Its tendon of insertion; 4, Short abductor 

 I,XTI:I:NAI. Mrscu:s or mi. of the arm; 5, liiceps ; 6, Anterior bracfaialk ; 



ni'iiiT AMI .1:1111: I.IMI;. 7 f Large extensor of the fore-arm ; 8, Short 



extensor of the fore-arm ; 9, Anconeus ; 11, Anterior extensor of the metacarpus ; 1 ! '. 

 Its tendon; 12, Aponeurosis separating that muscle from the anterior brachialis : 1 '.. 

 Ol.liipie extensor of the metacarpus; 14, Anterior extensor of the phalanges; 1-1', It- 

 principal tendon; 15, The small ten<linus branch it furnishes to the lateral eiteBMT; 

 10, Lateral extensor of the phalanges; 1"', Its tendon; 17, The lihrous band it. 

 n-c.-ives from tht; carpus; 18, Kxternal flexor of the metacarpus ; i;. Its metacarpal 

 t.-n. Inn; 20, Its supra'-aipal tendon; 21, Ulnnr portion of the performs; -j'j. Tendon 

 of the perforans; -':!, Its carpal ligament; 24, Its reinforcing phalangenl sheath; 

 25, T-ndon of the perforatus. 



