/ mi: .i\Ti:i;i<Hi 



.if tin scapular spine, by a short a|K>neiin>Ms. '! r : i,ntnx is eonr-nli-raMe, ;ml 



in a Millie liranrli tint ir' H '> to tin- groai troeh ml- -r. 

 The fiil>xj>;i,-itii.i i> not so large as the preceding. ami is also undivided at its inferior 



nity : it is tlir interior branch which is ul..-. nt. 



The r,,nii;i-l,nii-l,iiilix is very .-hurt, ami composed of ft single faictalhu, which 

 termintte> aUi\e the humeral insertion of the adductor of tin? arm. 



In tin 1'iij, tho disposition of this muscle is the same ; it is, besides, very tendinous. 



\K1M)X OK THE MUSCLES OF THE 8HOVLDEK OF MAN WITH THOSE OF AKIMAI -. 



, teres 



in tin- 





A- muscles of the shoulder, there are only described the <l>lt<ii<l, 

 minor and major, and the sul>scapnlaris; the coraco-brachialis being included 

 n of the arm. and the small scapulo-hiimeralig is absent (see Fig. 120). 



The a'tltat'il, represented in part by the long abductor 

 of tin- arm of Soli]>cds, is a large, triangular, flat muscle, 

 that covers the articulation of the shoulder. Its fibres are 

 inserted into the external third of the anterior border 

 of the clavicle, the external border of the acromion, and 

 the inferior lx>rder of the scapular spine for the whole of 

 its width ; lx low, it is attached, through the medium of a 

 n, to the deltoid imprint. 



I'-y their disjxisition, the eupcrtpinatiu, sitbsptiiatus, 

 ami xnlxrafiHlarix resemble the muscles of Carnivora. 

 The teres major, after establishing relations with the great 

 dorsal, as in Solipeds, is fixed into the inner lip of the 

 bieipital groove. 



MUSCLES OP THE ARM. 



These muscles, grouped around the humerus, 

 are attached to the fore-arm by their inferior ex- 

 tremities;. Those situated in front flex this por- 

 tion of tho limb, while those behind extend it. 

 The first form the anterior brachial region, the 

 second the posterior brachial region. 



A. Anterior Brachial Region. 



This region is composed of only two muscles, 

 the tony and short flexors of the fore-arm. 



1. Low i Flexor of th<> Fore-arm or Brachial 



T)- /T?:^^ an no 101 \ 



Btceps. (Figs. 85, 119, 121.) 



MUSCLES OK AN I I IMoi; ASPECT 



Synonyms. Coraco-cubitalis, or coraco-radialis, accord- i, Coracoid process of scapula : 



-'. ('oraco-clavicular liga- 

 ment (trapezoid) passing up- 

 ward to clavicl- 

 acromial ligameut. p. {--in.; 

 to acromion; 4, Subscapu- 

 lari- iiiajur: <, 



Coraco-brai-hialis ; 7, Bi- 

 ceps; 8, l'pp.T -iil of ra- 

 dius ; 0, Urai-liialis anti. u> : 

 10, Internal lu-ad uf t 



. (jirnnl. (I'l-for bracliii PercivaU. Scapula- or 

 radialU L< yh.) 



tratioH. Place the limb on its internal face, throw 

 Kai-k tin- Lrachiil in.scrtion of the mastoido-huim rulis, 



inimeralis, and Bterno-aponeurotioiu, OMT tin- ,-\- 



muscles uf the fore-arm; excise, K-ngthway.-. the 

 infi-rior extremity of the sii|K-rspinatu8, to show the 



tiii^ lemloii of tho muscle. Tin- inferior insertion 

 may IM- etmlii <1 with that of the short flexor muscle. 



Form Situation Direction Structure. A 

 l"iii{, cylindrical muscle, thick in its middle portion, bifid inferiorly, situated 

 in front of tho humerns, in an oblique direction downwards and backwards, 

 tendinous at its two extremities, divided by a grout number of strong fibrous 

 intersections, one of which, nearly central and much more considerable than 

 tin others, is ;i \\ry resisting cord that traverses the muscle throughout its 

 li, and becomes continuous with the tendons at its extreme 



.\it<n-limri,i*. This muscle has it* origin at the base of the coracoid 



