CHAP. IX. Of a Palsie.
A Palsie, in Latin, Paralysis, is a privation of Sense and Motion, by reason the influx of the Animal Spirits is hindred. There are various differences of it; for either it seizes all the parts of the Head, then it is called Paraple∣gia; or only half the Body, then it is called Hemeplegia; or it seises only one part, then it is called a particular Palsie. It is also called perfect, and imperfect: It is said to be perfect when Sense and Motion are wholly abolished; imperfect when the Functions are weakned: And then it is also called Numbness, which is a fore-runner of a Palsie. There is also another Species of an imperfect Palsie, when Motion is hurt, and the Sense remains perfect; and so on the contrary.
The causes of a Palsie in general, are all those things which hinder the influx of the Animal Spirits into the Nerves and Muscles; the most frequent of all is a Fleg∣matick Humour; which by obstructing, compressing, thickning or cooling the Nerves, hinders the said influx of the Animal Spirits.
The Pituitous humour flows from the Brain into the Nerves and spinal Marrow; so a small Apoplexy degene∣rates into a Palsie; because the humour occasioning it is cast from the Brain upon the Marrow, or beginning of the Nerves; and so it either insinuates it self into the substance of them, and shuts the insensible passages through which the Spirits pass; or passing by the Vertebra's of the Back, and spinal Marrow, and following the Course of the Nerves compresses them, and so hinders the passages of