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Show ~74. Book Ill. 0f the Medulla oblongata. er , 18 W 4,, T iic'Naziform l'i'ottelScs do lomewhat exceed the other in dimenlio-ns, but ) becaufe the drill-rcnce is more confpieuous in other Animals ( then in Man all to be at not are And , (N. Calves Sheep, Hogs, in larger they appear found in Birds», and Filli. Thefe four ()rbicular Prominencies are encircled with peculiar Membranes, rimming, \‘aiil'nrm xi rt ‘c- ( propagated from the @iitMaicr) by which they are divided from the other - Procelles of the Brain, and are feared between the anterior region of the (L'rfblfl/MI", and the polterior part of the third Ventricle, and do accrefce to the upper region of the Cdudcx of the Medulla oblongata, which theft Procclles do cover about an inch, and are not contiguous to the Surface of it in the middle, becaul‘e there pallcth a Cavity under them during their whole pro. . grcfs they have with the Medal/4 oblongata. I 1ol9 7, ,M «,7 Some Amtornifts make thefc continued parts of the Brain, but I conceive them mom. truly lh-OCL'fSCS fever-ed from the Brain ( by proper hdembranes) , and appended to the Met/wile ohlorigata. ' 1;] m. 0ft/Je Nledulla oblongata, itim' it; flppcndiigcr. The lubltance of thch Procefles in aMan, Dogs, and Carts, fcem to be (‘iiouts drill beautificd with a whitilh Colour like the Med/{"4 oblongata, but according to 1'} almr, it inclineth to Yellow, But thefe Protuberancies in Calves, Sheep, and Horfes, arc fomewhat different from other parts of the Brain, as affe- foon take their flight out of their Territories, and allociaie with the airi- bient Air. .l ‘ ' Dr. H'zllzr alligneth another ‘ufe to thefe round Prot'nberancies . That 7"" ""3"" the Animal Spirits, by the mediation of dii/Cl'x‘MCLlllllill‘y Procelles miaht iioihtaixitia have an entercourle with the Brain and (crabs/111m. D Ti‘n'rfl'm And the Animal Spirits are aflociated, and as it were embodied in "mm" this double pair of Procefses before they are imparted to, and converfe with the neighbouring parts; According to the Learned Author; ~14" ilfe m}, Propria, fit/e proceflm Imm‘ e‘Met/ulla oblangata in l1." prominentiar dilcerc an]; 1111M all ii/dcin aha/mere 6‘» illac in Cerebellar/z t/eftrri widctzr'r.‘ hint fufpicari liter, quad 'Prominentize 111x, preferrim Nalifiirmcr ( (1114‘ prin: tipaltr fruit) diverticula qua-dam fnerint in gut Spiritnr Animah'r 8 Me.(114111 oblongam in CHEM/[Hm (7 wire wcrfd in 1'11th dcrirtmndi fetcdanti (9» paulo infra #6216821"; port/'0 quantum Spirintr Animals: in atria/1; prom]:j "W10, (y in appendite refit/er, priufquam (Hebe/[0 inferamur ifl'UiCeill‘ [WW/(fl (an tommzfccri debent, ia't'irto pare: utriufg‘, [alerir [)rominencz'a' velar alir ad inc/item exporrefik, mnmo male/cunt. , 3 Not far from thefe round Procefses in the lower Region of the MttIullzt oblongula toward the Medulla Spinaltls, is {cared ailinall tranfverfe Tthomi'r cted with a kind of Flelh Colour, which (I conceive) proceedeth from their thin Membranes ovcil‘prcd with numerous branches of Blood-rebels; Proccfs, called @om‘ by Varolz'M, and he conceived it a part of the Ce- Til-015A? liut if you divelt thefe Prominencies of their fine Membranes, their more inward fubllance fccmerh to be hood with a Yellowilh Colour, much differ- pontem Cerebelli appellant depromit. But it is more agreeable to Senfe "Mm"? to call this tranfverfe Proccfs a part of the Meditlla ohlongara , to which Eiffhifsihca ent. from that of the Met/HILL ohlozrgdm. Some Anatomil‘ts are of an opinion, that thofe round Protuberancies are mi the Origcns of the Ccrthrimr and Cerebellum, which being conjoyned to iim them as f0 many (rm-11, to which on each lide they are appended; And 0": theft; Proccfses leaning to, and being afterward united, they conceive are appended the Tefliform Procefses , and from which the Medullary Aguilmlw M they conl‘titute the Mcdullaolz/azguhz; But this Conjcéture (asI humbly ' conceive) hath more of Fancy then Truth, by reafon the Brain is conjoyned to the Affdullrl ablangahz in other places before and without thefe round Pro-l cclscs, by whole mediation the Brain and Cerebelliim hold no great intercuurfe, as being fcvcred from each other by diliinét Coats; So that if" fcrioully confider their fitmtion and pofition in reference to the neigh- bouring parts, we may plainly perceive thefe minute Orbs do challenge to themfclvcs peculiar Territories, diliinét from the Certbrum, Ccrebcllmfl, and Medu/liz oblmrgara, and thefc Procefscs are confined within proper Membranes, as fo many dillinét boundaries, and are parted from the Trunk 9f the Mtzlnlliz oblongam by a Cavity running under the Natiform and Tclhv ' lornl Proccfrcs, As to the ufc ofrhcfe l'rominencies, Learned Baubimu‘ faith, That thcl are dcfigned as fo many Pillars to fupport the loofe Compage of the Brain,l€ the pallagcs leading out of the third into the fourth Ventricle, lhould' compreflbd, and the motion of the Animal Spirits intercepted : But. W" deference to this Learned Author, I humbly conceive this opinion is gl'oun ‘ cd upon a double improbability , Firft thefe fmall Procclles are 3 m0" folid fubfiance then the other parts of the Brain, which may be will refuted by Senfe; And the fccond improbabiliry, fuppoliug the Animal Spirits to be ‘generated in the Ventricles, which cannot be granted 1" realon, becaule the Animal Spirits being of a thin and volatil Ingen-v‘ 1‘ they had {0 large Chambers as the Ventricles, to converfe in, "'Fun 00 reballum, Ila cerebellum prim ingentem [Iii fobolem tranfryerfilem, quem illc "A" "cm Proccfscs being derived , and carried up obliquely into. the Cerebellnm g V. neat which other tranfverfe Procefses arife, and interftfl the other and are not inferted into the Caudeét of the Medzilla oblongata , but rathe'r en- . Circling it, do make the annular Procefs 1-, which ,is greater in Man 17.49. gj: then other Animals; and it is worthy our remark, that wherefoever the Natiform Procefs is large, as in Hogs, Sheep, and: Calves, there the an_ nular Procefs is fmall 2 But Where the Nam are fmall, as in Man, there the annular Procels is greater. The‘oflicc or lift: of the Annular Procefs is to give the full Origens "whim" to the fifth, fixth, and, feventh pair of Nerves; The Fifth takes its rife fiti‘iiulflm.' from the fides of the (Four Varolii, or Annular Proccfs; The, fixth pair of Nerves borrow their beginning from the lower Region-10f it; And the fevcnth pair being the Nerves of Hearing, are originally propagated ‘from the lower lide of this Annular Protuberance. , The inferior Region of the Cerebellar» being lifted up, the fourth Tthourti: Venmcle , lefs then the other, is offered to our View; which is made xxx: 0; Up of the Trunks of the Mdul/a Spinalir, the Cerebral/um, and the Third . ‘ Ventrrcle of the Brain at fame diltance, before they, are united, by rea«_ fan the upper and lel‘s part is made of the Sinm of the Cerebellar/1, co- veted with a fine Membrane, but the lower and pmore chief part Icem~ eth to be engraven in the Mediillaolgloiz‘gata, endued with a Cavity re~ {failing a Pen, whence it was called by the Antients, Calamm fcrip» .Some call this Cavity Ventiimlzmr Nobi/em, by reafon ( as they con~ Ceived)‘the Animals Spirits, flirt prepared in the upper Ventricles, re- ceive their ultimate perfeétion in this, land from‘ thence they do influ- ence the Mednlla Spinalis and Nerves; Which 'feemeth improbable," as it 4 t2 hath |