The dream above related, though excited by an unhealthy condition of the body, was not at all disagreeable. But it is often the case that disorders of particular organs serve to originate visions with special and evident characteristics related to their source. Thus, one of my patients, during an attack of uterine and hemorrhoidal congestion, would dream that a heavy weight had been laid upon the lower part of the abdomen. On another occasion, having gone to sleep, apparently in perfect health, she dreamed of a terrible pain in the head, and that her husband and a physician were applying a cupping glass to the back of her neck. This woke her up, and she found that she was actually suffering with a very severe headache. Another lady, shortly after confinement, dreamed that her baby had teeth, and that it was biting her nipple. Next day she discovered a tender spot in the breast, which rapidly developed a mammary abscess. Forbes Winslow[63] has collected a considerable number of similar cases. In certain instances not only have dreams been originated by special local pain, but the incipient stages of insanity have been revealed by exaggerated dreams. One of my patients, for a considerable time before the evolution of an attack of melancholia, would dream, every night, that a big black dog came into her bed. Another, who suffered with cardiac palpitation, caused by excessive tea-drinking, was often visited in sleep by a mocking imp who seated himself upon the pit of her stomach, and pressed her ribs together with his hands. The distress or alarm which accompanies such dreams is sometimes sufficient to arouse the sleeper. Often, however, he strives, in his vision, to escape from some impending horror, or to lift up his voice in a cry for help, but the will is powerless to reach the necessary muscles, and no movement results. In such cases the portion of the brain in which the will resides is awake, but the conducting fibres which intervene between the cortex of the brain and the locomotive ganglia in the cerebro-spinal axis are asleep, and cannot be sufficiently aroused to transmit the impulses derived from the action of the will.