BRA 



,,„,,. The ^-fp':-" -,-s:n;a t:^d::l''dS 



r'''^';,""hrfS''h; dlt^^Jlhe hen.fphe,-es f,-om each 

 from ^1"= '' f;^ ; ^1,,,, inches in length, .r.d ,s called the 

 '''^"' 1 .Vnm (In a hnguhr inftance, vhich occurred^ to 

 '^''cmZ f kwas d'elkient, and there was no d>v,i,oa 

 ^'' f - he,^s .Sec Tranfae^ions of a Society for the im- 



div.fion t a the "'I" ' > r Qf ti,e fiffura Sylvn, and 



the 1-™ Pi'<='-^ .f ''-K ^ ,"V 11 d the anterior lobe ; and all 

 u-hichreftsontheo,bit,,scaUea ^^^^ 



^^^" -tV:frt::^^-fbotS tentorium. isUd 

 petrou part "^ t'^^ \^ jP; Waller's d.v.hon of the cerebrum, 

 the poftenorlobe. ^"';^' ^'^ " ^^ by anatomifts. Some 

 .vhich has been g^".'^"y/2nor or great lobe into two 

 authors, however, 'l'^''^^^''^ Pf ^"'°V eh refts in the mlddle 

 ,, ,lhng ?- P^HLliddkli of the brain; and 

 ;£l£r^;PAthetentor...thepofter.r 



^"^stherearenodiaingui.a^I^;sinthe.pp.p^^^^ 



of the hem.fpheres of the ^^^^J^"^; , -^ .^e level of the 

 cuftomary to pare all th fe a-ay, near y ^^^^^ 



corpus call .fum, m ''''^'} '^^'T'^^Lu.,, certain cavkies 



vhich are fituatcd on e"ner i ^^^l-i,!^ a fedion of the 



...called ^'-;-- :;^SS mpJf^d^^f t'^o fubftances, an 

 bram we perceue that it is ^ ^^ ;^^,^,.,„r „ne 



terior one wh,c^. .s o . -^ -|. ' ,,, eritious and 

 which IS white, ^^''"'^f-r,- i„grea and alba; or, from 

 ,vhite fubftances, or f^^.^^f) ."^^''^ ^h, bark does the wood 



the former [u-o""^-£ '^^ "co^ "a-diftinaion, the cortical 

 of a tree, they are named n coin ^^^^.^^^ 



and medullary f^^ft^nc s of the brain _ ^ ^^^^^^^^^^^^ 



receives fo great a fnpp.yof^b^^^^^^^^^ ,he medul- 



Injeaion it appears ^hnoa compo ^^_^^_ ^^ ^^^^ 



laiy fubftance ° V^^r^t on of a black fubftance, named by 

 cruracerebriisafmallpo >onot a ^ ^^^^^^^ 



Soemmernng locus niger ^^^ ^j Pj^^ ,„„„3l ,,d 



fubftance, P^--^^ '"S °f 2^^PP ^^ ,„ the under furface 

 -;ifeniftSri'ob:,ant::'na;edby Soemmering portio 



'■^^fthe fubftance.of ^et^i-ij[;;;;;^3h.b.i^ 



„.oved by «P"'^^,,^":r"l^t ° the greateft extent of 

 of the corpus """f^-;^^^ d^onftrfted in the brain, 

 niedullary matter, ^^^V^ hemifnheres is united by the 

 The medulla of the '""'^ ^'"T^'^^X „^^ 



.s c^lofum T e .a gm aUn. is^^ ^^ 



--,°'^'d^ Z:\^ Td^frfrtwo^tmfplieres, inU . 

 overlapped ^^T ^l^-^^gi bidden, until the hemifpheres 

 manner ^^^^V^j r ^r or removed by diffeftion. Its 

 ,,, either ^^f ^//^tf 'o halToI the he.mfphere, audit 

 length IS equal to that or o. ^j^^^.^ 



L plced in fuch a ht-tioii th P ce^equ ^^^^^^,^^ ^_^^ 



„f its own length is left, b<=twecn ^^ ^^^^^^^^^ 



the front of the cranium -^ ^J^^-^i^^^, The breadth of 

 its pofterior P- ^^^^ '^^^.tt t lefs in front. Its upper 

 this part IS about , °f ^^ ^^'^^'^^^....ds in front and behind, 

 rt"to rnr■;wJ^rled extremities, which are the 



BRA 



bourrelets anterleur and roflmeur of V-'l J';yy'-- JL^" 

 nrominent lines run throu^^h the whole length ot the corpus 

 cX fum with a dcprcfTum between them, wlych >s called 

 the raphe, -rranfverle lines proceed from tlufe on both 



''tI^; t^o' ^£l -ventricles (ventricnh tricorn« of ^•i^ 

 a'A/vr( are fituated in the fubftance of the bram, by the fide 

 f f di?cir :: caUofum, tone in either l>emifp ere ) an ihou Id 

 be opened by an inc.hon along 'he nnars m of that bod . 

 The roof of the ventricle being difletted oH, 'ts '^o""'- 

 becomeTapparent. The cavity begins in the fror^ lobe of 

 tl c bniin, as far forwards as the commencement of the 



p^ cal'lofuni. This portion of the ve-Unc es^ ^vh,cll 

 formed between the fro.ft of the corpus ftnatnm and the 

 Lduiry matter of the front lobe, turns rather outwards, 

 Tnd dfttinguiftied by the name of cornu anterms. rie 

 ventricle then runs from before backwards in a direflKm 

 vent ce UK eallofum, and diverging from 



r p : ite e'^^ AlWards it bends downwards fonie- 

 tl no like the turning of a ram's horn, and returns obliquely 

 £nfl!S;mlforwardt to terminate f "f^ "'^^ '-, ^^ 



Sa:S^ho::S;he'-:^ntriele At t^^^ pla^ whe.e U. 

 ventricle bends in order to run downwards, theie is a. pa. 

 ic 1 location paffing into the pofterior lob^ /ormin^ a 

 triangular p^^intedcavity tc^-ti,^ in^a^ J ^c, with 

 it^ Til) nt turned inwards. l nis is mc u.i, ,' r , 



ito point turiit ventricle. Its length and fiv.e 



cavity. i''« ^"f l*^" '/,„i- accumulates fomttimes to the 



Berohni, 1796,410.) _ ,,„. r.r,arated bv a perpendicular 

 The two lateral ventricles are leparatea d) <i p<. f 

 inetvxoiau , p , f the nferior furface of the 



cavity, call d t'^^ J^'th Ventn ^^ ^^^^ ^^ 



t:::riX^^^^^o7.o mew the two layers and 

 '"¥rli::"'S;po.d of t- -ura, whicWrUe inj«mt 



°^ ''' 't:::^:: '^:::^: :^':^^ ^^ ^ ^^- 



Si:f: bcSS Z twl^rpora ftr.ta, and on theuppcr 



