In mediaeval times, sufferers were regarded with awe, as being possessed by a spirit. Witch doctors among savages, and founders and expounders of differing creeds among more civilized peoples, have taken advantage of this infirmity to claim divine inspiration, and the power of "seeing visions" and prophesying. Epilepsy has always interested medical men because of its frequency, the difficulty of tracing its cause, and its obstinacy to treatment, while it has appealed to popular imagination by the appalling picture of bodily overthrow it presents, so that many gross superstitions have grown up around it. The description in Mark ix. 17-29, is interesting: "Master, I have brought Thee my son, which hath a dumb spirit. And wheresoever he taketh him, he teareth him: and he foameth, and gnasheth with his teeth, and pineth away: ... straightway the spirit tare him; and he fell on the ground, and wallowed foaming. "And He asked his father, How long is it ago since this came unto him? And he said, Of a child. And ofttimes it hath cast him into the fire, and into the waters, to destroy him. "And he said unto them, This kind can come forth by nothing, but by prayer and fasting." Up to the present, epilepsy can be ascribed to no specific disease of the brain, the symptoms being due to some morbid disturbance in its action. Epilepsy is a "functional" disease. GRAND MAL ("_Great Evil_") An unusual feeling called an _aura_ (Latin--vapour), sometimes warns a patient of an impending fit, commonly lasting long enough to permit him to sit or lie down. This is followed by giddiness, a roaring in the ears, or some unusual sensation, and merciful unconsciousness. In many cases this stage is instantaneous; in others it lasts some seconds--but an eternity to the sufferer. This stage is all that victims can recall (and this only after painful effort) of an attack. As unconsciousness supervenes, the patient becomes pale, and gives a cry, which varies from a low moan to a loud, inhuman shriek. The head and eyes turn to one side, or up or down, the pupils of the eyes enlarge and become fixed in a set stare, and the patient drops as if shot, making no effort to guard his fall, being often slightly and sometimes severely injured. The whole body then becomes stiff. The hands are clenched, with thumbs inside the palms, the legs are extended, the arms stiffly bent, and the head thrown back, or twisted to one side. The muscles of the chest and heart are impeded in their action, breathing ceases, the heart is slowed, and the face becomes pale, and then a livid, dusky blue. The skin is cold and clammy, the eyebrows knit; the tongue may be protruded, and bitten between the teeth. The eyeballs seem starting from their sockets, the eyes are fixed or turned up, so that only the sclerotic ("whites") can be seen, and they may be touched or pressed without causing blinking. The stomach, bladder, and bowels may involuntarily be emptied.