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THe Rack bones of the backe may bee dislocated inwards, outwards, to the right side, and to the left. We know they are dislocated inwards, when as they leave a depressed cavitie in the spine; outwardly, when they make a bunch on the backe; and wee know they are luxated to the right or left side, when as they obliquely bunch forth to this or that side. The vertebrae are dislocated by a
cause eyther internall, or externall, as is common to all other Luxations; the inter∣nall is eyther the defluxion of humors from the whole bodie, or any part to them and their ligaments; or else a congestion proceeding from the proper and native weakenesse of these parts; or an attraction arising from paine and heat. The exter∣nall is a fall from high upon some hard bodie, a heavie and bruising blow, much and often stooping, as in Dressers and Lookers to Vineyards, and Paviers, decrepite old men; and also such, as through an incureable dislocation of the Thigh-bone, are forced in walking to stoope downe, and hold their hand upon their thigh. But a vertebra cannot be forced or thrust inwards, unlesse by a great deale of violence; and if it at any time happen, it is not but with the breaking of the tyes and liga∣ments, for they will breake rather than suffer so great extension. Such a dislocation is deadly, for that the spinall marrow is exceedingly violated by too strait compres∣sion, whence proceeds dulnesse, and losse of sense in the members lying thereunder. Neyther is restitution to bee hoped for, because wee cannot through the belly force it into its place: the urine is then supprest, as also the excrements of the bel∣ly; sometimes on the contrarie, both of them breake forth against the Patients minde, the knees and legges grow cold, their sense and motion being lost. Such things happen more frequently, when the spine is luxated inwards, than when it is dislocated outwards, for that the nerves, thence arising, runne and are carried more inwardly into the bodie. Besides, the pressed Spinall marrow becomes inflamed; and that being inflamed, the parts of the same kinde, and such as are joyned thereto, are also inflamed by consent, whence it happeneth, that the bladder cannot cast forth the urine. Now where the sinewes are pressed, they can no more receive the irradiation of the animal facultie. Hence followes the deprivation of the sense and motion in the parts whereto they are carried, therefore the contained excrements doe no more provoke to expulsion by their troublesome sense, neither are pressed to keep them in; thence proceeds their suppression, and hence their breaking forth against their wils. But the spine outwardly dislocated, scarce causes any compres∣sion of the marrow or nerves.
Differences and signes.
Causes.
The danger of a vertebra dislo∣cated inwards.
Hipp. sent. 51. sect. 3. de art. & Gal. in com.