Till- lill.lflllAl. I'LEXUS, 



the Dog famiihee branches to all tho digits, except the auricularis and external border 



dt" the anmdaris. 



In tin- Cut, tin- median traverses the bony cnnal at the lower extremity of the 

 huinrrus. and separates lielow the carpal arch into three brunches. The internal 

 branch is destined to the rudimentary tliuiub, and the intern. il palmar border of 

 the index. The middle bianch descends in the third interosseous space, furnishes a 

 nt to the large cushion of the paw, 



nnd divides to form the external palmar 

 collaterals of the index and internal of the 

 medins. Finally, the external brunch is 

 |.l .eed in the second intermetacarpal space, 

 and gives the following palmar rW/<i/< ///* : 

 the fjclernal of the medius and internal of 

 imilaris. 



The ulnar nerve of the Dog, below the 

 elbow, lies beside the ulnar aitery to the 

 lower third of that vessel ; there it forms 

 t\v<> branches a dorsal and palmar. The 

 / 1'i-iiiich becomes subcutaneous, passes 

 along the external border of the fore-arm, 

 metacarpus, and small digit, and con- 

 stitutes the external dorsul collateral nerve 

 of the latter. 



Tin- /iiilntitr Iniiich leaves the carpal 

 sheath, gives off, at the trapezuides, a ramus- 

 cule that pa-.- s to the surface of the palmar 

 muscles to form the external collateral pal- 

 mar of the auricularis, and then, at the 

 surface of the deep palmar arch, divides into 

 eight terminal ramuscules. The smallest 

 of these is expended in the rudimentary 

 muscles of the thumb, the small digit, and 

 intcrossi ous muscles; the largest, three in 

 number, lie on the interosseous arteries, and 

 bifurcate at the digits to form the palmar 

 collaterals ; the two internal ramuscules are 

 previously confounded with the correspond- 

 ing branches of the median. From this 

 arrangement, it results that the ulnar nerve 

 supplies the palmar surface of all the digits, 

 except the internal bonier of the index. 



The ulnar of the Cat also divides into 

 a d<>rsal and a palmar branch, but the dis- 

 tribution of these is not the same as in the 



The dorsal branch bifurcates at the car- 



Sus : oneof the filaments forms the external 

 orsal collateral of tU- small digit; the 



Fig. 352. 



-A 



V. VEBMOBCKEH sc 



NERVES OF THE PALMAR FACE; CAT. 



A, Trunk of the median dividing into two 

 branches ; n, Internal branch, giving a 

 nxliim-ntnry filament to the thumb; r.l. 

 Kxternal branch, receiving a filament, /, 

 fr.'in the ulnar; c, C, C, C, Collaterals fur- 

 ui.shed by the median. a, Palmar branch 

 of the ulnar dividing into three branrlu-> ; 

 6, Internal branch, detaching the filament, 

 /, to the median; 61, External branch; 62, 

 Deep branch ; c, c, c, Collaterals furnished 

 by the ulnar. 



other reaches the first lutezoMeoiM sj ace, 



(ranch from the radial, and after- 

 wards gives ofl' the internal doi>al collateral 

 of the small digit, und external of the 

 auricularis. 



The palmar branch does not extend to 

 all the digits as in the Dog. Passing within 



the pisiform lx>w, it divides into several filaments : some of these nro distributed to the 

 inu.-clcaof the small digit and thumb; an. .ther follows the external Imrdcr ..t" the j-mall 

 and c ,n.-titiit. .- it.- . Menial palmar collateral ; one .f the 1< i'.rcd in the 



tir.-t intermetacarpal tpace, giving a filament to the largo cu.-l.iun of th< |..u. and 

 the inti riuil palmar collaterals of the Hiimll digit and exti rnal c,| the annularis. 



COMPAHISON OF THE BRAflllAI. 1 1 I XfS OF MAN WITH THAT OF ANIMALS. 



The bnit-hial ph xus of Mnn, like that of the Dog, is ( n>titute.l by the anterior 

 brunches of the four hi.-t ci rvicnl, and the hist dnr.-al m rv- .-. Tin- few variati- 



