IN mi-: .vr.sv /. /:>. 



tin- ft miir at ita middle. Dissect the ins. rt ions of the long vostna, tho nhort 

 adductor of I ho leg, and tin- semitendinosiis, to oh.serve the coniinuity of fuse nmwlen 

 with tin- tihial aponeurosin ; .-duly tho in-ertion.s of tin.- ii|M>neurcmi8, particularly that 

 which it lius on tlit" Hiuniiiit of the; cnlcia. To cx|Mmo tin- niu.-i-l. .-. remove tin ir 

 a|N>iieimitic envelope. It-living, however, the hand it forms in front of the trillion of the 



llOCk, as Wt'll ati the hands \\hieh fetllill the tendons. Remove the ho if in the manner 



already indicated for the anterior extremity, and. finally, M-paratc the muscles from one 

 another n operation so very .-imple a not to require any H]>eoial directions. 



A. Anterior Tibial Region. 



This is composed of three muscles: the flexor of tlie metatarsi/*. the, 

 mitt rior extensor, and the lateral extensor of tJte phalanges. Tho first is 

 deep-seated, tho other two are superficial. 



1. Anterior Extensor of the Phalanges. (Fig. 135, 20.) 



Synonyms. Femoro-prephidanjjeus Girard. The extensor longus digitormn pedis 

 of Man. (Extensor p&Jis 



Situation Direction Extent. This muscle, situated in front of the 

 log and foot, follows the direction of these two rays for their whole extent. 



form Structure. It is formed of a muscular body and a tendon. Tho 

 first is fusiform, depressed from before to behind, aponcurotic at its superficies 

 in its superior moiety, and tendinous internally in its inferior moiety. Tho 

 tendon, at first round, then flat, commences a little above the inferior fourth 

 of the tibia, and reaches the anterior face of tho principal metatarsus, where 

 it receives the pedal (extensor brovis digitorum) muscle, tho tendon of tho 

 lateral extensor, and a funicular prolongation of the tibial aponeurosis. It 

 afterwards descends on the fetlock, where it comports itself exactly as the 

 corresponding tendon in the anterior extremity. (See the anterior extensor 

 of the phalanges in the fore-limb, page 262.) 



Attachments. Above, in the digital fossa placed between the trochlea and 

 external condyle of the femur, through the medium of the tendinous portion 

 of the flexor of the metatarsus fixed insertion. Below, on the capsular liga- 

 ment of the mctatarso-phalangeal articulation, the anterior face of the two 

 first phalanges, and the pyramidal eminence of the os pedis. 



Relations. The muscular portion responds : outwardly, with the tibial 

 aponeurosis; inwardly, to the flexor of tho metatarsus; posteriorly, to tho 

 lateral extensor of the phalanges. Tho tendon successively covers : the 

 anterior aspect of the tibia, the anterior capsular ligament of the tarsus, tho 

 pedal muscle, tho anterior face of the principal mctutarsal, the articulation of 

 the fetlock, and the two first phalanges. It is covered by tho tibial aponrii- 

 rosis, and by three annular fibrous bands destined to maintain the tend .11 in 

 the bend of the hock. One of these bands, tho superior, is fixed I y its ex- 

 tremities to the tibia, a little above tho tibio-tarsal articulation ; it is common 

 to the muscle we are describing, and to tho flexor of the metatarsus. Tho 

 miildlo band, attached to the cuboid branch of tho latter muscle and the 

 inferior extremity of the calcis, is exclusively intended for tho anterior ex- 

 tensor of the phalanges. The inferior maintains the two extensors agninst 

 tho superior extremity of tho principal metatarsal. 



A'-lion. This muscle extends the^ligit and flexes the entire foot. 



2. Lateral Extensor of the Phalanges. (Fig. 135, 28.) 



8ynoni/ms.- Peroneo-prephalnn^eii* -t;;,;inl. The pi -mil. -iidhrcvid of Man. (1'eronetu 

 1','n-lri'ill. Tiliio-iifi'li'il'iii'.,' '" - 



Sti -ni-tin-i l'].il<nl 7>/Y<r//"//. This muscle, situated 



