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Show 1072 Ofr/Je Medulla Spinalis , or Tit/9 oft/ac gar/i. m The more noble operati~ ons of the Soul are {cared in the Brain. Book III. 0f the Medulla Spinalis, or Tit/J of the back. [he Medulla Spinalir, and the greater and more noble part {hould be the 0H1 fpring of the morelittle in quantity and perfeélion 5 The rationa l 0pCi‘ation: the elicite, and imperate aéts ofthe Underflanding and Will, and the Fang}: ons ofthe common Senfe and phancy,are celebrated in the Brain, and only the acute ProcelTes, to fecure this line filver Cord, (as the VVil‘e Man ltyleth it ) from the rougher approaches of outward Obieéts. The Comer Within the fafer immurements of the more hard and bony fiibfiance of the Vertcbers; the more tender l‘ubfiance of the Mala/la is enwmpped in more thence propagated down into the Medul/a Spinali r, and f0 tranfinitted to the numerous Pail-s The Firfi and moi} outward, is a (trout: membranous Coat, ariling from the Ocripat, as fome conceive, whereit is firmly tied to the upmoll: Verteber of the Neck 3 but Learned Spigelliiw, deemeth it to proceed from the Ligamentsof the Spine, to Which the Medulla Spinalr'r is fal'med, and therefore it is called Ligamentoflz, in reference to its ligamentous Origen, confifiing of many (mall Iigamentous Filaments, rarely interwoven witha mol‘t curious and Divine Hand, {hiking them clole, and making them one entire Membrane, keeping the Metlulla tight from fuflering any violation in the va- receive their irradiations from Animal SPl- rits, ilTuing out ofthe Brain into the Medal/a Spinalr: 5 ii) that all mulcular motion is firl'c acted by the Commands, and imperate acts of the Will feared in the Brain. And lalily, I will {peak more clofély, in order to give a reply to the impro. bable conjeélure of thelc Learned Men, earnefily contending, that the Brain is an appendage of the Medal/a Spinalir, which can neither be a principle of Membrane of the Mdulla Spilzalis, which is propagated from the Dara Ma- when the nervous Liquor is firfl formed in the Cortex of the Brain, eth in, and interpofeth it fell, which is not difcernible by a carelels Eye, by web, and therefore called Aracrzocialer, adorned with numerous {inall Arteries and Veins, importing and exporting Blood to and from the Medulla; this Membrane is tied to the Euramatrr by diverfe nervous Filaments, before they infinuate themfelves into the Membrane, immediately encloling the Medal/a, which is the Fourth and lall: Tunicle propagated from the Pia mater, fir plexy, and Catalepfir ', the motion of the Animal Liquor being intercepted in and is curioully enamelled with great variety of finall Arteries, which infinuate themfelves into the molt retired parts of the Mada/la, bedewing it its progrels towards the Mala/la Spirtalir, the lpinal Nerves lolE theirSenrc and lVIotion, as wanting their Wonted and due influen ce difpenltd to them from the Brain: Neither can the Medalla Spinalia claim a prelieminence over a with vital Liquor; of which wliatfoever is Luxuriant, is returned by the exilt before the Brain, which can no Way be reafonably granted, when in truth in this, neither of them can challenge a liiperiority over the other, they The Mdrtl/a Spinalia is not one entire fubfiance, but is parted long-ways down the middle into Two equal portions, by the interpofition of the fine Membrane, propagated from the T'ia mater, which when it hath encucled the being truly_ Twinns, and have their conception in the "term at the fame time within the Skull, and is improperly {tyled a part of the Mdulla Spiralira that being properly lb called, which is lodged Within the Spine, and pallfll" through the whole length of it, from the Vertebers of the Neck to the 0! Sacrum. The mam" Its fubl'tauce is much akinn in colour, to that of the inward ReceileSiifnd 22%an Mt‘tllllla oblongata of the Brain, but fomewhat different in folidity, being fomewhar more compact, growing more and more firm, as it maketh its aP' proach toward the O: Sammz. Its tender fluid fubliance, not capable of refitting brisket allalllfsu l5 immured The Fourth Covering. Veins, toward the right Chamber of the Heart. the Brain, per 7710([1011 originir, which lilppofeth the Merlull a Spinalir to pre- The M21141]: Spirit": is double, The Third Coat. realbn of its great finenefs; upon which account it is amulous of a Spiders ‘ the Medal/a Splllallf, which cannot be a prineiple or dilpenfation to the fgfggggtgfi Brain 5 becaule the Brain doth influence the Medal/ a Spinal}: , which :23 ngnff cannot celebrate its operations‘ol: Senfe and Motion , except the Spinal WARM Nerves receive their {hit irradiations from the Brain, whole noblcr lunrpsmtaisaci. étions cealing in the fiagnation of the Latex Mere/0f t", cattle an Apo:gnfiggfi out oi the feminal Matter, the true Origen of them both, at once giving theina fitlt rudiment and delineation : Qyod @‘n Cerebrum, (5‘ MW" Spinalir ex Iimpidiflima aqua in coagulant calloflmz cozzden fenmr. As Great Dr. Harvey, our worthy Colleague, hath very well obferved. The A/fea'ul/a Spina/ir is vulgarly divided into Two parts, the Firll is the larger and more lliort, taking its rile at the termin ation of the Brain 3501" it, and is Three or Four Inches long, which being the Origen , is Contained The Second Coat. is joyned in divers places to the Tennis membrana by the mediation of many membranous Fibrils .- But between thefe Two Membranes a Third creep- ted; neither can the Mada/la Spimt/id be a princip le, per mollum fraturz‘gnir, and thence iiiilhgcmciiiifii conveyed through . the torpm calla/21m, FMinx? and ‘Mcrlnl la ohlorgm to "Mm: The Brain, and Midulla innxlis have their conception at the fame time. The Firfl Integumcnt. ter, and is a much liner and thinner Coat then that of the ligamentous, and the Brain, and not in the Mada/la Spindle, as it hath been lately demonlha. "WWW lion r. rious flexurcsof the Vertebcrs 5 this is immediately encircled, by the Second Dignity, feeing the more eminent and noble aéts of the Soul are exerted in 11:33:53 the Med"!!! .tpinrli; are delicate Membranesas f0 many {oft Repolitories, which are Four in number, of Nerves Iprouting out of it. And Ilaf't ofall, the Tendon; thiidiiiifiiiitii of Mulcles ( made up of the concourl‘e of various Fibres of Nerves derived receive its} from the Medal/a Spirzalir) when by feveral contraétions Ziiiiirrifdm motions in antagonifi Mufcle they make diHéren; s, The Authors Opinion. The cafe of theMedulIa inu M. work, excellently beautified with great variety or oblique, tranlilerfe, and fenfe of Touching and Morion are acted by Nerves,tranfniitte d From 1115.19:dulla Spinalir into the membranous and carnous parts; and the llfl‘vous liquor is firfi: generated in the Cortex, and Medullaty lubltance ofthc Brain) and ""3"" 107; immured within {trong Walls, being faFely locked up within numerous flrong Vei‘tcbcrb as {0 many linall Cabinets finely wrought with rare natural Bone- fuiface oi the Jera/uIla, infinuateth it {elf into the molt inward Recefles of it, the Pit; mater being a kind ofMedialtine, or Sepiment, which (paliing down clean through, from the beginning to the termination of the Spine,) diVideth the Medalla into Two equal, but dil'tinét Provinces 5 but fome are of Opi- The Melulla Sp'mllll is divided into Two equal parts. niOH, that the Medulla is one undivided fubfiance, as being notparted by any manifefi Filiure, which though it be granted to be final], as it is fearce l ifcerniblein a humane Medulla,yet it is more confpicuous in a,l§ullock,where it is plainly parted by the Pig water into Two equal‘parts, until it arrive the Vertebers ,Of the Loinss f0 that on either {ide avCavtty may be difcovered in the Medulla of an Ox gently boiled; with which I humbly conceive, that ofa Mans holdeth fome good Analogy, Mt per/[time Clariflimm Pavrus obferwatzahe undecima. In oirp, Arm? mi/ltflz‘mo Qginquagefimo Nudge/21am. Norm all e. 5h, Spiflfllnu Merlullaizl, a Pia matre manifefle in duo .laiera dI'Ulfilm, apparai 5 "bferwag/it. So that each ofthefe Two Provinces being fevered by the me.iation of the Pia water, bath peculiar {mall vellels, Fibres, and Nerves, ":hich have no entercourfe with each other; and the fountain of the nervous Iquor being placed in the Cortex, and Medullary parts ofthe Brain, 35:1::2]: The Mrtullx inulu of; Bullock is parted by th: PM mam. |