Catalectic ant

( Math. ) A certain invariant which, together with the can on is ant, presents itself in the problem of the reduction of a quantic to its canonical form. Catalep's is, Cat'alepsy, n . [Gr. kata leps is - kata , and lambano , to take or seize.) ( Med .) A disease in which there is sudden suspension of the action of the senses and of volition; the limbs and trunk preserving the different positions given to them. The circulation and respiration are in most cases but little affected; but occasionally they are greatly depre ed, and are sometimes even imperceptible. The attack may last only for a few minutes, or it may continue for hours, and even, it is said, for days; and consciousne generally returns with the same suddenne as it left, the patient having no recollection of anything that pa ed during the attack. This disease bears a great resemblance to the mesmeric state, and, indeed, is so often feigned, that many have doubted whether it really had any existence. There can be little doubt, however, that it is sometimes, though not often, a real disease. The hysterical and melancholic are most disposed to it; and the paroxysm is frequently induced by some strong mental emotion, or by some disorder of the digestive or secretive organs. The treatment will nece arily vary in each particular case, according to the general condition of the patient and the probable exciting cause.