OCR Text |
Show /, 0f the Mmom Liquor. Boolm fame inltanta contrary motion, aFlux, and Reflux of Liquor, While the reflux of Liquor at the fame time muft encounter an adVCl'lC fiream (alwav; flowing in the Spaces between the Fibres) forced downward by lh‘ own weight and the gentle conflriétion of the Brain; which is Caufcd by the pul. fation of finall Arteries implanted in the futhance of the Brain, whereupofl it being difficult to make out (as I apprehend) the retrograde motion of the Animal Spirits, which fuppofeth a contrary motion ofthe Animalat the fame time in the fame VellEIs 5 So that outward Senfation (as according to the Learned Author's Opinion) cannot be probably founded in the recoiling of the Animal Spirits from the Organs of outward Senfe toward the Origen of the Nerves and Mednlla of the Brain 9 But I molt humbly conceive that it is more agreeable to the oeconomy of Nature to conltitute Sen. fation in the motion of various, outward, fenfible Objeéts, making different ltrokes upon the Fibres of Nerves, implanted in the Organs ofSenle, and thence continued to the original of the Nerves and Medullary Proceflfgs of the Brain 3 where the inward Senfe being lodged, perceivethand judgeth the different Appulfcs, made upon the Fibres of the outward Organs, and thence conveyed by the mediation of the lame Filaments of Nerves to the Seat of the inward Senfe, which holdeth an intimate eorrefpondence with the outward, by the interpofition of Nerves, continued from one to the other 3 And Senfation cannot be accomplilhed without the mutual concun The nature of mutation. 0f the Maroon: Linear. fl," F'~‘"‘--~-»-.-. ._ ._ , nncd intermedial (teps of Nerves, to the Fancy, watching in the middle or {he Brain, fomewhat near the original of the Nerves, which perceive 311 A pulles made upon them, bythe motion oftlie Ideas, derived from Sent}, Book III. ble Objeéts diftinguifhing and )udging of their feveral qualities and propricn ties, by the different Modes of their imprellions. And the Animal Liquor is not only an infirumental efficient caufe of the 7:16AM", rational and Senfttive operations, but or the Motive too, conlifling in Mul: cular motion, wherein you may View the Wife oeconomv of Nature, as the Senfttive and Motive Powers, are fubordinate to the rational, and do all agree according to their primitive conftitution in apmoft excellent harmony. L The Golden Chain ofthe four pritne faculties of the humane Soul, is made up of four Links, two fuperior, the Underlianding and Will, and two inferior, the St'nfitive and Motive Powers. The inferior humbly fpeaking Obedience, in fubmitting their ineaner Operations to the more Wife Diétates and lmperate Acts of the foveraign faculty. Andl now {hall take the boldnefs to entertain you with a {hort difcourfe ofthe other faculties, in order to the better tinderltandiiig ofthe motive, which hath itsdependance upon them,as precedent to it, in order ofNature at lealt, if not ofTime‘, Senfation both outward and inward, being minif'terial to the Un- and variety of Senfitive Perception is thus celebrated : beingufed not ftriéily but in a Complex notion, doth in fomeltind coinprehend the outward and inward Scnfe, whofe conceptions and operations f0 many fmallBodies {teaming outof Senfible Obyeé‘ts, and being difpofm with various figures and magnitudes move to the outward Organs of Senfe, are not fo feparate, but they do involve and prefuppofe each other. But to fpcak more frilly to the nature of Senfation, I conceive its ratio for- and are received into their Pores as holding a due proportion in the refemblance of figure and magnitude, and as the Efiluwin of outward Objects, The one being the caufality of the Agent, is liyled Action, which being tranfient, pafleth from term to term, and is called Motion; and as it is re ceived into the term to which 'tis propagated, is denominated Pallion. The outward fcnlible Objeé'ts,conlilt not only in the reprefentation 0f Colours, but in Sounds, Odors, Sapors, which are compounded of minute Bodies, as active cfiiwia, endued with certain Magnitudes, Figures, Poltures, and Motions, making impreflions upon the various Contextures of the SCHfOl'iBS of Sight, ‘Hearing, Smelling, and Tafling, and thofe minute Bodies flowrug from lenfible Objects (being reltlefs in activity) are tranfmittcd from SUblcatO Sllhifét, from Agent to Patient, and are received into the Pores 0f numerous Fibres, as they are commenfurate in magnitude and figure {.0 thOlC BOdlC-‘a {beaming from the outward Objects of Senfe; and upon this "50"!" the Efimia as different in Magnitudes, Figures, Pofitions and MO' "9115. make various Appulfes upon the Fibres of Nerves (which bfill‘gm' vigorated by Spirits feared in the Animal Spirits,are rendred tenfe and fill? all along the Fibres) receiving the firll: l'trokes made by Senfible Ob)"its m their EXUCmities initirted into the Senfories, and thence the AP‘ pulles are continued to the Origen of the Nerves, and Fibrils, implants." into the Abdul/a of the Brain; So that a motion , made in the end of the F1bres, placed in the outward Senfe, are propagated to the beginning of the Flbfes Of the Brain, (Where the inner Senfe inhabiteth) is one continue 3&1911,‘ "‘0! Unlike a Vibration made in the termination of a Mulical String, which is immediately conveyed to the beginning of it, lb that an imprellioil made by an Idea in the outward Senfory palleth in a moment by the 60"" nut Eh; {timer tliellliifria‘hb m" detltanding and Appetite, as they are imperative of the Motive, conlilting nonfat: in 3 Symmetry, and Harmony ofthe Ob}eét with the Organ. The manner $33,525, rence and cooperation of the Fancy with the outward Senfes; and Senft‘ malts confiflcth in Aélion and Paflion, a"; m'flm ,9 w" mar/v- which are not really diltinguilhed, but are different Modes, affecting various Subjeéisa figLfifgrfa:,{, , Ev, The Ejfliwia being are exaftly fitted, they gently touch the Senfory, by giving a pleafant operation, but if the unproportioned Obyeéts roughly {trike againl't the fides of the Pores, they make a harlh Senfation in the Senfoty, a fine Contexture of many minute Fibres, which as they are aéled with {trong or weaker A ppulz ' fes, make brisket or fofter Vibrations upon the Nerves continued from the outward Senfories to their lituation in the Medulla oblongata, and thence to the Fibres drclling the more inward RecelTes of the Brain, where the Fancyileated,which entertaining thefe flrokes,prefenteth them to the [Indera (landing, and as they are Good or Evil, are Judged'fit to be embraced or rcfufed, and accordingly reprefented to the Appetite, which accordingto . the diétatcsof theUnderltanding, layeth her commands upon the motive "my, Which is exerted by virtue of contracted Fibres, theimmediate Ma- , . CthES 0f Mufcular motion. . , tiaivifilfi‘tf: But the difficulty is, how the motion of the Mufcular Fibres is performed, and whatisthe efficient caufe ofit; which I conceive to be the more fplfi‘ tuous Particles of the Animal Liquor contracting the Fibres of the Mufcles. The Brain and its Appendages of the conjoyned Nerves feem in lome kind iiiiiiiiil 95, in); "l " :‘gj‘firjj'gjyyl t: {133.}?ch to refemble an inverted Tree placed with the Roots upward and Branches Tm; OWHWa r d . The Comx I: the Stiemcr The numerous Capillary Veflels fprcading themfelres in the Coats and 323333, Cortexof the Brain and Certbcllum, feem in a fort to reprefent Roots, out'Of ornament Which the Animal Liquor (being percolated from the Purple through the fine firaiuer ofthe fubfi'ance of the Cortex) dePcilleth through the whole body of ' the Brain and Medulla Spinalir, as through a greater and finaller' continued runk, into various Nerves, as fo many greater fruitful Branches, andine t0 abundant Fibres as fo many {mallet Twigs, and all‘o into innumera~ if united Fibrils making the rare Contexture of Mufcular oUtward Coats, fornewhat |