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Show Of Z‘lJt‘ I‘QZ/Ji‘ll‘lir am! 5245;" mm 0/5 the (Brain. Book lll. iiigiiii. Appetite and l‘eiilitive operations, more intenlely or reniilsly framed RCCOrding: tothe more pallioniite or cooler inward acts, or according to the brig," or fainter iiTipi‘L‘iliOI'iS,ma(lc upon the Fibres ofthe fenlirive Organs by "I‘Onger C H A P. XXXVI. or weaker appiilles of outward Objects; Burl refer the more large dileoiirriof the Mes and ae‘tions of the Fibres, and that of the Nervous Liquor [Unlmitted between their various Filaments,t0 a farther difcourl‘e. 0f [/30 Cortex of [/16 19min. The whole Compagc of the Brain emulating a Globe, is divided 2 great way into two equal parts, having a Fillure parting the Brain in the middle I'M ll mi? ptmcs or :he Brain. 1T.4' i t. Kill. from the Surface to the (orpm‘ Calla/um, in which is lodged a Duplicature of the Dum Arli'nflzx, dividing the Orb of the Brain into two HCIIIilpliares-r, lo flyled by Learned Dr. Willir, which rather (as I humbly conceive) form two parts of. one Hemilphazre, becaule if both {ides were clolbly united, they would make but half the Globe, unlel‘s the partition were made from the fiirlace to the bale of the Brain, which is only made in the hinder part lying on the Cerebellar/1: And therefore the two upper [ides dillinguillied by the The fitiiiiioti or the l:le' Splines. Falcilorme Procel-s beingY feparared from the Corpm Callafizm, may be more properly called two portions ofone, then two dillinét Heiiiifplixres. As to their fituation, their upper Region confineth upon the Fizz Mater, and their lower on the Cor/i115 (‘allafiim 3 Their middle on the Falciform Proecls; Their Surface is beautihed with a pleafant profpeéi: of various Circumvolii. tions full of numerous Branches, and Capillary Arteries and Veins, alceuding and delccnding into them, and above all, adorned with a multiplicity of minute nervous Fibrils, the Hill rudiments of Nerves. There Azzfmfi'm confill of a Cortical, Cineritious, and a more bright Mediillary fiibltance, which are lo finely interwoven with diversinfertions made one into another, that they will admit no fepiiration, but the more inward Recefles of theft llt'iiiifphrti‘es are more entite,being framed ofawhitc Medullary fiibl‘tance derived to the (30er Calltfum. Aving unvailed the Brain ofits upper and lower Veils, and dil‘courfed loiiiewhat of the Hemilphseres, and of the Origen, and Com~ Page ofthe Brain in a general Notion; I conceive it not altogether improP"? togive you a more particular account of the Brain, which may be diVided into a Cortical and Medullary fubltance : The Firll: is Alli-colouredJ the othsr White. The Brain is made up ofimny parts and l'rocellcs, wonderfully framed, as (0 many Tubcrahanging together, as with lhort fialks, mcly conioyned‘, and thoughthey be difiinguiflied from each other , yet every Procefs claims to its lelfits proper form, into which it IS expanded, The parrsof the brain. and leemcth to contain a little volume, and there being many Leaves allborind up together, make one entire round Model, in which it is very difficult to difcover the beginning and end, and the leveral confines of cvea Iy dilliiic‘t part ofthc Brain; the leveral Procelles being lo curioully framed, and eiiwrapped one within another, that it Will require a skiliiil hand to unfold them, without offering a Violation to their proper CoatsJ which are in nearly contiguous to each other. The ambient part ofthe Brain, commonly called the Cortex, every way ovcrlprcadetli the Mimi/[1, and is adorned with finall Sprouts ~of Arteries andVeins, rarely cnwrapping the Surface of the Brain, and releinbling lo many Tendrels of Vines, encircling an Arched Frame. The Arteries ant] Veins of the Canm ' The Cortex of the Brain is rendred unequal, with many partitions running, in labarinths and Maeandcrs, not unlike the circumvolutions of the lure> (lines + and pulling from the fore-part of the Brain to the hinder, ina The Com; is full oi'Gi‘ies. f T. 45, .F'. i, t we. winding circumference, do encompafs both Heiiiilphasi'es, and give a mutual reception to each other. And in a moill Brain, long kept from Interment, and tending to l'iitrefiaétion, the (Piiz Mam may be ealily leparated from the Brain, and the tops of the Circumvolutions may be‘parted‘7 lo that you may pry into the bottom of the Iiiterllices, and plainly lee, as it were, the Furrows made in the liibl'tance of the Brain, not carried forthright in any direél: progrcls, but as it were mutual circumvolutions, iiiterfeéting each other; lo that the bottom of every furrow, taking its rife from the Right fide, palfetli toward the I eft; then the fubfequent beginncth from the Left lide, and tiirneth up to the Right, making a decullation with the former, and {0 conleqiiently, all the Circumvolutions placed in the bottom of the feveral Furrows, conclude in the liabllance ofthe Brain, and obfetve the fame Method and Order. IF any per-{on lliould be lo inquifitive as to demand a reafon of thtle Air- frizfi'm ofthe Brain, it may be replied, (as I conceive) That the outward Surface and Cortex ofthe Brain is finely wrought with feveral lniall capillary Arteries, and nervous Fibrils, rarely interwoven with the fubllance of the Pie Meter, and lecurely lodged within the winding lnter‘fiices ofthe Cortex, andlVledullary ftibllance of the Brain, to give the firll conception and Birth [0 the nurriciotis Liquor ; and afterward to dil'tribute it to the inward Receifi'5- And became [his liibtle Alimentary Juyce cannot freely expatialtc in aroe D The Pit M1151 may he fevcrcil from the israin. when it rend; ctli to putt}. fathom. The tile or the Circumv voliitions of the Brim. The caril'eof the Flcxurts cftli: Brain, |
