OCR Text |
Show .7 I O; 8 The Cerebella of other fInimalr. m Book Ill: llggdé" [Sliinanlfllmch in. The Cerebellum of a Bitch is framed of many Provinces, Two lateral ones, and one feated in the middle between them. The middle Province 'l- hath a more large Origen, and ends in more narrow dimenfions, and is endued with many oblong Procelfes, going ' crofsways and fomewhat like Parallelograms in ihape. Hubbub. The lateral Provinces confilt {if} diverfe 1rank:1 of Proceges 1- which to be Five on one fide, and C H A 1). ree on t e or er; near t e on en of V iieemcerebellum, may be difcerned the Tefiiform Prominencies, encoginpgf‘. rm fing the lower Region of the Procelfes. . In this Animal the Natiform Procefles 1- do adyoyn to the terminations 1 z. of the Tbalumi "err/ovum opticomm -]-_ Parted from each other by a Fil{Ute "f LL . ‘ . . 4 0f Newer arzflngfram t/se Bram nut/2m the 5/1"". , , ‘ Aving difcourfed the various Procefles and Coats encircling the Brain, The Nerves now offer themfiElVes as f0 many Sprouts fpringing out . _ of it, and (as I humbly conceive) are divers united Fibres, taking the", The him: 7. to, w. The Cerebellum of a Doc is compofed of One middle and Two or Three iiincucreifggc. lateral Apartiments. "r". bebbi. The middle Province 1- is much larger then the other, and is madeup of many oblong tranfverfe Proceffes. . The lateral Apartimcnts 1- ( are Three on each fide ) of which the lat. gefl; CHCil‘chS the middle Province. coming hold Origens from the Cortex, and pafling through the feveral Proeelfes of the "whiff? Brain, are conjoyned in the Medulla oblongata about the Bale it, betaufe iii/MA" Nerves being the continuation of Fibrous Particles (emittedof out of the 9‘71"qu Cortex, palling through the fubfiance of the whole Brain, into its lower rcgion, perforating its Surface and Coats) expatiate into the Organs of Scnfe, and ad}acent Mufcular parts. . So that every Nerve may be fiyled (asl apprehend ) a Syflem of many Thcdcfcfixp (lender nervous Filaments, tied together by many thin Membranes, ha- mg? ving in their inmol't Recelfes a kind of Medullary pulpy fubfiance, a continuation of the Medu'llrz of the Brain, propagated along the inmolt parts of the Nerves, which is mof't confpicuous in the Nerves before they perforate the Skull, and mofl: eminent in the Nerves of Fifhes, which I have feen emitted out of their fmall Brains, not filling the Cavities of their Skulls, have thereupon longer Nerves within, efpecially the Olfaétory, big within the Skull with a White Medullary fublltance, which is the fame with that of the Brain, in colour and confiflence. It is the opinion of many Learned Anatomifis, that the Nerves are com- mettle pounded of a treble fubf'tance, of an outward and inward Coat, encompaf- fubflapce cf ling a third more tender pulpy fubftance 5 the exterior Coat, as they lay, is "1mm" derived from the Dum Mater, the interior from the (Pin, encircling and feo curing the inmoll Medulla, propagated from the Brain it felf; To which I take the boldncfs to giVe this reply, That every Nerve is not only endued Withabraee of Membranes, but if Well confidered, with more numerous thin Filaments, making up the body of the Nerves, which may be clearly demonfirated in Dilleé'tion, becaufe every Nerve being a bundle of many Fin hres immediately communicated to it from the Medalla oblangum, which is a Compofition of innumerable minute nervous Fibrils, either tranfmitted from the inmoll Recelfes to the confines of the Medal/4 Spin/1hr, or conjoyned in Particular Bodies, made up of many thin Coats, emitted from the upPerand middle Regions of the Brain to the Mada/la oblongata, and thence "69?ng through the Coats inveft the Bafe of the Brain. And thefe fruitful Filaments, framing the greatell: part of the Trunk of A mm," the Nerve, involve in their Center a foft tender fubl'tanc'e, iil‘uing out from, Signing?" and continued to the Brain, figfigfm‘ Having touched upon the NerVes arifing out of the Medulla obla‘ngnm .in a gmeral notice, come we now to a more particular furvey of them, which are in number Ten Pair, according to Dr. Willis, and other Learned Modem Anatomifls. K in T56 |