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Show 30m book lll. [If 0f the Met/our Iquizg'w M ‘MW cles of the Mealulla, varioufly intermingled with the Cortex, where it is ima CHAP. Pregnated with volatil Salt, and thence tranfmitted throngh the (7027M (‘JL [ofum into the Corporaflrmla, and (rum, and Trunk of the Medulhz rib/ringing, it'hichare rarely Enamelled with an innumerable company of llrealiy Lines, being fo many Fibrils of fmall Veifels, the Rudiments of Nerves; and be. LX. 0f the memoir/r Liquor. tween the Interftices of thefe molt thin Filaments, the Animal Liquor Con- Aving given you a Narrative of the feveral Proeeffes of the Brain7 Certbellum, Medulla Spindle, and the Nerves fpringing out of them, tinucd to the Nerves about the Surface of the Medztlld oblongam, infimmmh it felf with a foft fiream between the Coats of the Inflruments of Senfe and Motion, which aét more or lefs briskly, as they are more or lefs invigorated With a greater or lefs proportion of Animal Liquor, which if it be more The Nervous Liquor now feemeth to offer it felf, of which I have djf. then is requilitc for Completion of the Nerves proceeding from the Medal]; courIEd already, and will give now a farther account, as the perfeéhon of all the parts of the Brain, Cerebellum, M'dulla Spinalir, giving thtm Vigor, Motion, and Life, produétive of the feufitive, motive, and intelleélual aéts, the confummation of the raft. The prime Liquors of the Body are the Laélefcent, Vital, and Animal, which fubalternately and mutually prepagate each other, the Chyle being the Afateria fab/tram of the Blood, as the Blood is of the Animal Liquor, and the Animal fubfervient to both, it being f0 wifely difpofed by the Maker of all things, that they lhould be dependant upon and aflifling each other, and mutually a& various fcenes of life, Motion, and Nutrition, as they in- the Spine, which are fo many fyf'tems of Fibres, taking their firft rife from themore inward part of the Medal/a, where they are divided into many linall Branches, and afterward united into one common Trunk about the Sur- The nameface of the Medal/4 oblongata,to whofe hinder part the Ccrebellum is faflned with iiiisniriihmr other. two Medullary Procelfes, as with the "WW"! - a, double flallr, by whofe. mediation . into Trunk; In the Animal liquor three things may efpecially feem worthy our re- Cti'thellum holdeth an entetcourle With the Medulla oblozzgdta, in difpenling to ilwm‘c‘ it an Animal Liquor firli: produced in the Cerebral/um. xiiiiimi The purer part of the Blood is impelled out of the Aom into the many As to its produé'tion it is derived from Blood (as its Materia fitbflram) divarications of Vertebral Arteries into the Cortex of the Cerebral/um, wherein which is made up in a large notion oftwo parts; ofthe red Craflament as more the more ferous and faline Particles are difcharged into the Glands, and the more gentle albugineous, holding a due configuration and magnitude with fierce and Sulphurcous, and of an Albuminous Liquor, conlilliug in more niild ferous Particles. the CorticalPores of the Cerebel/um, are thereby lirained, and received into The Vital Liquor is forced by Perong contractions of the flefliy Fibres of the Heart, out of its left Chamber into the afcendent Trunk 0f the Aorta, a them, whilethe more gtofs parts of the Purple Liquor being of a different running in a [rally current as out of a great Cifiern into a fmallcr Channel, through which the mol‘t fpirituous Particles (mounting up through the Carotide Arteries) are carried through the Skull, and Coats, as into the Cortical Glands of the Brain, as ingenious AlzlflmgfjiH/S will have it (and as others, no 15f? Learned) into the fubl‘tance of the Spirits of the Brain fraughtwith many minute Pores, entertaining the Crifialline Liquor, the more foft part ofthe 3100i is impelled out of the Extreniities of the Capillary Carotides, into the CmP‘Y. Cerebellar", is thence difpenfed by Medullary tracts into two large Meditnllia, throngh which it gently defiilleth by two linall Medullary Procefles into the Medulla oblongtita, whence it is conveyed into the feveral pairs of Nerves, derived from it. ' 1PaCCSOHhC (bf/0X, where it being extravafated , the fubtle Particles of the Crillalline l iquor, holding a due proportion with the extremities of the Cortical Fibrils, are bvm‘ul flim) the more grofs albuminous Matter: and "d Craflfunent of the Blood, ( which being of unequal Figure and Magnitudc With the minute pall‘ages of the Fibrils of the Brain) are returned into tpe HCapillary Jugulars‘, ftreaming downward toward the right Cifiern ol tic cart. The Animal lfl‘lum Ming firft generated in the Cortex, is afterward'fjro‘ Proved tyne. pagated by motion, through the drfiercnt Proeelles of the Brain, receivlng ifillriféi‘rlif greater and greater refinement by Motion, becaufe this choice LiqlloI Pa' yorén‘suayr in {ing through the mailer Li'mtm of the fort") in which it is flr-eiried, as ‘ mal Liquor is firi'c conveyed by fccret Nerves through the fubftancc of the Medal/4 oblongara to the Medm'lzz Spinalis lodged within the Slrull,and thence delhlleth along the Mednlla feared within the Spine, and fo propagated out of itsfubliance by minute pallages, Fit-ft into the Various Filaments feated in the inward Recelles of the Medulla, and is afterward continued to the Nerrcs of timately efpoufea mutual interefi, and by various fieps accomplilh each mark; its firll produétion and propagation, or motion from part topart, and the ufes to which it is defigned. hmmm vhlongata) it is thence communicated to the Mcdulhl Spun/it, being a contin nuation and clogation appendant to the former, and the fupcrabundant Ani- figure and greatnefs, are excluded thefe Pores and difcharged into the Jugu- lars; but the Animal Liquor, exalted with Volatil Salt in the Cortex of the ThusI have given you fome account of the motion of Animal Liquor, and of its fever-a1 Gefles from part to part through the various Procefles of the Brain and (‘ercbellmm into the Medlt/[zt oblongam and hfedulla Spinalir, by whofe mediation it is carried into numerous Nerves. It may now feem notaltogether improper to give you my meaner thoughts :f‘ilizitiirfim concerning the caufe and manner of its motion, which may be celebrated as 9""? m} well out of its innate difpofition as a fluid Body (folhcrted downward by ""5 "1"" its mm Weight; from the ambient to the more retired and lower parts of the Brain and Medulhz Spindles and .their appendant Nerves, as alfo forced [hither by an impulfe caufed by the Arteries, inferred into the Cortex, "where the Animal Liquor hath its birthright-of the more gentle, feparated front . "c more fidphureous.-part of the Blood, and receiveth perpetual increafe through a fine Colitory, and then deflilleth out of feveral Plexes of minute Cortical Velfels, as through fo many Serpentine Duets, into the ftnall Parlii- made by aconfl'ant repeated propagation of new Liquor," one l'artfucmm"e PFleeth anOther forward, whofe more thin and fubtle qulance tn-ay‘eafily C 55 m innate |