7V//; /./ MBQ-8ACBAI PLEXUS. 



779 



.al genital organs. IIP- r.-pr. .--nted in Soliprd- by tin- r unifications of the lumbar 

 nerves, which have bee!i separat'-ly doc-ribe 1. Tli-- terminal brandies an; the 

 inr (/'(;((/, and "lit- ;/") / in'>rdl (or iiiit'-rf'ii- < iinnl . Then,- is nothing to be said 

 ilnij tli" obt!iriit"i- IHTV : 

 it lc i\cs tin- pelvi.i liy tin- obliga- 

 tor t'oruincii, as in all the animals 

 mentioned. Tlio ortnal has 

 been dcM-iibed us having t'oilr 

 terminal bia-iches: the /V- //<</ 

 and I'jf' i-inil iniisculo-cutatieoiw, 

 tin- in rr, at' tUa triceps crun //.- 

 (miin-nhi? Lrn ii<-li), and tin- in- 

 t' rind faplienouf. The two mus- 

 M&MwtofMMU I 'flinches have 

 their analogue in the Horse, in 

 the filament we have named the 

 --ory braiidi of the iuteninl 

 Miphcnoiis. The nerve of the 

 triceps is expended in the an- 

 terior nvtiis. and the va-tn> 

 interims an 1 extenms. The 

 .aphelions de-cends between the 

 nuiM-les of the inner 8i)ect of 

 the thigh, beneath the aponeu- 

 and becomes superficial at 

 a short di.-t moo from the con- 

 tlyle of tlie femur, giving a 

 patellar braiu-Ji that divides in 

 the *kin of the knee, and a 

 tiliial branch that is expended 

 on tlie inner face of tho tarsal 

 ai tit-illations and the fout. 



The sacral plexus comprises 

 tin- lin-t three sacral nerves, t > 

 wliicli is added lumbo-saoral 

 branch furnished by the lumbar 

 m-rves, and a fine nlanu nt that 

 ascends from the fourth sacral. 



Ti-n collaterals and a ter- 

 minal branch arise from this 



pi- MIS. 



The collateral branches are 

 divided into intrajjelvio and 



i .. lvi> : th'-y are five in 



each group. The first an- de>- 



tined tn tin- mii>i-lesi>I tin- inner 



I vis, and to tho-.- 



neiiiii and t e .-kin 



oftlii.s region. The w-.'ond an- 



listlilint- d t) the musi-i' 



i.r.MUAU rj.i.xr.s or MAN. 



1, liiglit i;angliateil cord of syin]>athetic ; 2, Abdominal 

 aorta; .'{, 3, Last dorsal nerves; 4, Psoas pan; 

 Quadnitus lumborum ; (3, Psoas niagnus ; 7, 7, llio- 

 hypogastric nerves ; 8, Iliacus internus ; 9, 9, llio- 

 in^uinal nerve; li>, I.umU>->.irnd lu-rv.- ; 11. ti.-nitu- 

 crural nerve; 1'J. (ilutral in-rv.- ; l:>, Iliac branch of 

 Illo>hjp0gutric l, rvi- ; 14. Sacral plexus: 1 ">. 1 "'. l.'i. 

 Kxteraal ciitaneinis MTTWj 1 7. Tr.-.ii-v.-r-;di> ahd.iuii- 

 ni^ ; lit, Obliquus internus; _'!, Obliquus externus ; 

 Anterior crural nerves; _'.",, _';,, Obturator 

 ii.-rv.- : _'", -J7, Crural branch of genito-crural nerve; 

 _'!', ii-nital branch of geuito-cniral nerve: ill, Kxterual 

 iliac artery ; il.'l. Kxt.-rual alulniiiinal ring, 

 itcr asjH-ct of the jHlvis, 

 and tin- .-kin on the p.isti rier fa--e of t thi^h. They are : 



I. \'i-rrnl lir<in<-l,i* th.it d. -ci-nd I.M tin- M,I,.. S of the rectum and an- lo>t in t'ie 



istri plexus : _'. .V.cr. <>f tl,.- ,l, ,,,t .,- ,,f tl,.- , >. :;. H.< ,,,,,,- r h>. i,lnl or <n/.i/ nerve ; 



\. Nerve of tlie internal obturator tii&i appear.* t ari-e, in the I!or>.-. fioni tin- I 



trunk; :">, ////< rmi/ /<i/*V. which h .s l-.-n di>M-iiUr<l with the .-arral m-rve.-. In .Man this 



pelvis by tin- gn at sciatic n tch (or foriinn-ii .and n turns t-> it by the 



: within the i.-chiatii- tn"n ;".- t\ :t dividert into two blanches: an interior or 



/;/'/<'<'/. and a superior or ihtrtuli* [H-iii* n,rr,-. The latter is placed on tiic dorsum 



of the p ni.-. and leaches the mueoui membrane of the glans and pn-inuv : tin- form, r 



Mt g-i b-ymid t.ie mn-eb-s and inti-jnm.-nt- of the p. rineiim. i:. I 



Incrre; 1 , Nerve of the pyramidaU* , s. .V. /r ,>f i>,. fn^rinr ,jnn, /;-. :. \,rceof 



/ .jit'i I, ,:ln* em ''//'.-I ; 111, The fiitull rrintic. or nift rinr tjlnt<;il 



the inferior or feinoial bran.'ii of which is very I'lur. di ending, as it does, to the middle 

 i'ior f.t.-i- of tin- thigh, belie.ith the crural a|incnio.-i.-, fi tin |xip!ilenl .-i ac, . 

 when- it >< i n - Mij.-rli.-i d. and termiiud -s in the skin of the njijM-r p'tlinn l tl.e (MT. 



