MUSCLES OF THE ANTERIOR LIMBS. 261 



hunierns : tin- '/</*, aoraco-brachialit, and the anterior brachialit ; behind are found 



the /r'r/i.< I'l-ncliinli* :nnl the anconlM. 



Tin- ln'f> /i.t, \\hich corn -|xni<ls to tho coraoo-radialis of animal.-, commences mi tin- 

 scapula li\ t\\i> In ails, which unite tuwaids the upjn-r part of tin- hiiim-ms. Tin- Imii; 

 |>rtion is detached fiom tin- upper i>art of (lie rim of the glcnoid cavity: tlie si, 

 cmmm n. -i .- fruni the summit of the coracoid prooes*. The inter. or tendon of the 1 

 -iv, s off, before tixin- it-df on the bicipital tuberosity, u h'br,,u.i lamella which is con- 

 fniiinled with the aiitibrachial aponeuro.-i-. 



The coraro-brachialis has only one fleshy body. 



As in the Carnivorn an<l Pig, the anterior Iruchiulis terminal 8 on the ulna, below 

 tin- coroiioid pn.ec.--;. 



I'lic /y/'v/<x int'-hinlis exactly represents, by its three heads, the large, middle, anil 

 ->rs of the fore-arm of animals. (See Fig. 120.) 



There is nothing particular with retranl to the awaneut. The long extensor of the 

 .irm of the Horse Las no rrpn-.-. ntaii\. in Man. 



MUSCLES OF THE FORE-ABM. 



These muscles, nine in number, distributed in two regions anterior and 

 posterior envelop the bones of the fore- arm on every side except the 

 internal, where the radius is in mediate contact with the skin. They all 

 terminate on the different sections of the foot, which they flex or extend, 

 and are contained in a common fibrous sheath, which constitutes the anti- 

 linn-hial aponeurosis. 



Antibrachial Aponeurosia. 



This retaining fascia forms a very strong and resisting envelope, which 

 is firmly fixed around the antibrachial muscles by tho insertions it has on 

 the bones of the fore-arm, being attached to the olecranon, the internal aspect 

 of the radius, and to the inferior extremity of that bone, both inwards and 

 outwards. 



xternal face is covered by superficial vessels and nerves, that are 

 separated from the skin by a very thin fibrous layer, which is more 

 particularly observable on the inner side, where it covers the antibrachial 

 aponunrosis in a very evident manner ; it is rendered tense by the sterno- 

 apniirurnticus. Up to tho present time, this fibrous layer hns not been 

 distinguished from the aponeurosis it covers. The inner face of the latter 

 gives rise to several septa, which penetrate the interstices of the muscles to 

 form around some of them special retentive sheaths ; it adheres to several 

 of thi'iii very intimately. At its upper border, this aponeurosis receives, 

 inwardly, the insertion of tho long extensor of tho fore-arm; in front, tho 

 accessory band of the coraco-radialis ; outwardly, it is continuous with the 

 fibrous fascia covering tho external face of tho olecranian muscles. lufuriorly, 

 it is prolonged around the knee to form tho tendinous sheaths in that 

 rrgion. 



The antibrachial aponeurosis is made tense by tho contraction of the 

 l"iig extensor of tho fore-arm and the coraco-radiulis. With ivtVn-nce to 

 tho storno-aponeuroticus, which has hitherto been regarded as intended to 

 play the same part, it can only aet on tho fibrous fascia which covers, 

 externally, tho antibrachial aponcnrosis. 



>n <./ tli- iH'it'l" "f the fore-arm. Tho preparation of the*- niiis< 1 

 .1. ly simple, as it suffices to remove the antiliraehi.il a^nu iimsi.i and the intei-tui.il 

 celliil.>-:i'lipo80 tissue, to expose and to isolate them fri.m a<-h oilier. 



..meiidatioiis need, therefor*', be given, as a glance at figures 89, II!', l.'l, and li 

 ill u'tiiile the -tml. ut in his dissection, and supplement the manual details whii-h would 

 .|H-rlhn'ti.- licre. 



terminal in.-erii" -of the.-e miisele.* are ineloscd within 



the li it U iinli.-pen.-alilc. in order t" >-\\ them, to rennnr llrs lu>rn> 



MM .\plunution will ! ^'iNcii a.- to tlie manner in \\hifh ihi.- .-h-mld ' 



