////: 



Fig. 1-2-. 



and nerves on tlie inner side of the arm, and 

 the long extensor of the i'orr-;mii. 



Action. An extensor of the foro-arm. 



5. Small Kctctisor of the Fore-arm or Ancom w 

 (Fig. 85, 10.) 



Synonym. Humero-olecranius minor Gimnl. 



Form Structure Situation Relation*. 

 This is a small, thiek, and prismatic muscle, 

 almost entirely fleshy, situated behind the elbow 

 articulation. It is applied against the synovial 

 eul-de-sac which ascends into the olecranian 

 fossa, and to which it is strongly attached ; it 

 is hidden by the short extensor, from which it is 

 not easily distinguished. 



Attachments. It originates from the margin 

 of the olecranian fossa, chiefly above and out- 

 wards. It terminates by being inserted into the 

 anterior and external part of the olecranon. 



Action. This little muscle, a congener of the 

 preceding, raises the articular capsule it covers, 

 and prevents its being pinched between the bony 

 surfaces. 



DIFFERENTIAL CHARACTERS OF THE MUSCLES OF THE 

 AKSI IN OTHER THAN SOLIPED ANIMALS. 



In all animals, the long flexor of the, fore-arm, or 

 cornco-radialis, is less thick and tendinous than in Soli- 

 peds. 



In tho 1'ig, Dog, arid Cat, it comports itself in a 

 special manner at its inferior extremity ; it is attaehrd 

 at first to the bicipital tuberosity, and also furui>h - H 

 small tendinous branch which glides over the inner M>! 

 of the radiiu by means of a synovial bursa, and is fixed 

 within the ulna, towards the base of the olecranon. 



The short flexor of tlt fore-arm, or anterior bracJiinl. 

 is terminated, in the Pig, Dog, and Cat, by a small 

 tendon which is fixed in the ulna, below the ulnur 

 branch of the coraco-radialis. 



The long extensor of the fore-arm, which is found in 

 all the domesticated animnls, ;irisen from tho external t'.ier 

 of the great dorsal. in the /'/;/ and Mw/. The 7 /<///' 

 extensor of the fore-arm and aunoneiis of the.-.' :miiii:ils 

 an; remarkable for their volume. 



COMPARISON OF THE MUSCLES OF THE ARM OF MAN 

 WITH THOSK OF ANIMALS. 



In Man, three muscles are .situated in front of the 



l.l.lil- MUSCLES ON UXTKRNAL 

 ASI'PXTT OF RIGHT ANTERIOR 

 LIMB. 



1 , Scapula ; 2, Coracoid process 

 of scapula ; :!, Flexor brachii ; 

 4, Superior extremity of humenis; .% External tuberosity of humerus; G, Humeralis 

 externus; 7, Body of humerus; 8, Biceps; 9, Anterior, or great extensor of tho meta- 

 carpus; 10, Ulna; 11, Extensor pedis, or anterior c.\t-iisor of the phalanges; \'2, Ulnaris 

 acoossoriua, or ulnar portion of the perforans ; l.'t, Lateral extensor o|' tin- un-taear- 

 pns, or extensor HuflTraginis ; 14, Oblique extensor of the metacarpus; 15, Flex ore of 

 the foot; 16, Trapezium ; 17, Annular ligament; 18, Carpal ligament of perforans 

 tendon, 20; 19, IVrforatns; :.'!. Tendon of anterior extensor of metacarpus ; '-'2, Small 

 metacarpal bone;; -'{, Suspensory ligament.; '2 t, Lateral lian'l of inet:icar])O-]ilialangeal 

 sheath; 25, Perforans tendon; 2G, Branch of the suspcnsoiy ligament joining the 

 extensor jiedis, 27. 



