CAP. XVI. De Vertigine.
VErtigo, is a false imagination, in which all objects, and the head it self, seem to turn round, ab inordinato & circulari motu spiritus ani∣malis in parte anteriore cerebri exorta. Or, it is a sudden darkning of the eyes and sight, by a va∣porous and hot spirit, which ascendeth to the head by the sleepy arteries, and fills the brain, disturbing the humors and spirits which are there contained, and tossing them unequally, as if one ran round, or had drunk too much wine.
A new Vertigo, that comes but seldome, and proceeds only à causis externis, levior est, ac curatu facilior. If in it the head and whole body seem to wheel & to turn round, the cure is very doubtful; and if the sick man falls to the ground, it foretels an Epilepsie, or Apoplexy; especially if the Vertigo hath continued long, and comes very often. In an old man its most dangerous, because his brain is colder and weaker, and flegm doth more abound: A vertigo proceeding from hot humors is sooner dissolved, than that which comes of cold, quia humores calidi faciliùs discutiuntur.