This disease borders so closely upon the one previously considered, epilepsy, that its manifestations are allowed to be identical with those of reflex epilepsy. It is also stated that eclampsia may be transferred into true epilepsy; the main distinction appears to be that the convulsive .spasms affect chiefly the extensor muscles, and appear without any disturbance of the mental conditions and independent of any structural alterations. In fact, the disease is really one of pure motor-nervous excitability.