nervous

card 1 of 10 · context meaning

What does 'nervous' mean in this sentence?

All Nervous Diſtempers whatſoever, from Yawning and Stretching, up to a mortal Fit of an Apoplexy, ſeems to me to be but one continued Diſorder, or the ſeveral Steps or Degrees of it, ariſing from a Relaxation or Weakneſs, and the want of a ſufficient Force and Elaſticity in the Solids in general, and the Nerves in particular, in Proportion to the Reſiſtance of the Fluids, in order to carry on the Circulation, remove Obſtructions, carry off the Recrements, and make the Secretions.