There are many cases in which there are only "absence" and "falling," but in others, symptoms much more alarming appear. The next of these which we notice introduces us to a totally distinct element in our explanation. It is found in the "screaming" that follows instantly on unconsciousness, and precedes the "falling" generally. The sufferer is entirely unaware of all that occurs with him, and screams by no voluntary act on his part. The symptom is purely bodily, and expresses no thought or feeling, good or bad, though it is similar to the scream of terror, and makes the same impression on the uninformed hearer. The muscles are used in the scream of epilepsy, just as the muscles of ordinary movement are used in St. Vitus' Dance, but there is nothing of the mind whatever in the movement. The organ of the mind is unsupplied with vital action, but the organs of voice are over-supplied. It is beyond doubt this over-supply which shows itself in the scream, for there is nothing else to account for it. The same thing is true of the movements of the jaw that are so terribly strong, and so sorely wound the tongue, in the case of those suffering in this way. The jaws open and shut with great force, and without the mind regulating their movement. All the motor nerves are convulsed with strong action, and the muscles they supply are wrought to the utmost, while all consciousness and control are entirely suspended. There is such an overwhelming supply of activity to the mere muscular system that the sources of that supply are soon exhausted, and the motion ceases for a time. Consciousness does not at once return fully, but the convulsions cease, and something like a sleep follows before the brain has its needed supply. How is it that vital action seizes these mere motor nerves and leaves the brain? There is a symptom in cases of epilepsy which tends to throw some light on this question. It is seen in the extreme activity of the brain, indicated by the incessant talking of the patient before a series of convulsions come on, when taken along with the extreme depression and silence that follow such a series. During whole nights, even, the sufferer will talk, till every organ is exhausted; then comes a series of violent convulsions, then a season of perfect silence and bewilderment.