Arteriosclerosis of the cerebral vessels is always a serious condition. The greatest danger is from rupture of a blood vessel. Another of the dangers is gradual occlusion of the arteries bringing about necrosis with softening of the brain substance. The latter is more apt to be associated with psychic changes, dementia, etc.; the former, with hemiplegia. It is curious that a small branch of the Sylvian artery, the lenticulo-striate, which supplies the corpus striatum, should be the one which most frequently ruptures. Where the motor fibers from the whole cortex are gathered together in one compact bundle, a very small hemorrhage may and does cause very serious effects. A comparatively large hemorrhage in the silent area of the brain may cause few or no symptoms. =Spinal= It is conceivable that arteriosclerosis of the vessels of the spinal cord might cause symptoms which would be referred to the areas of the cord where the process was most advanced. The lesions would be scattered and consequently the symptoms might be protean in character. True epileptic convulsions dependent on arteriosclerotic changes are also seen and are not so uncommon. This is on the whole a rare condition, much less common than arteriosclerosis of the cerebral vessels. Collins and Zabriskie report the following typical case: "H., a fireman, fifty-one years old, was in ordinary good health until toward the end of 1902. At that time he noticed that his legs were growing weak and that they tired easily. Later he complained of a jerking sensation in different parts of the lower extremities and at times of sharp pain, which might last from several minutes to two or three hours. The legs were the seat of a heavy, unwieldy sensation, but there was no numbness or other paresthesia. About the same time he began to have difficulty in holding the urine, a symptom which steadily increased in severity. These symptoms continued until March, 1903, i. e., for three months, then he awakened one morning to find that he was unable to stand or walk, and the sphincters of the bowels and bladder relaxed. There was no complaint of pain in the back or legs, no difficulty in moving the arms, in swallowing or in speaking. He says he was able to tell when his lower extremities were touched and he could feel the bed and clothes. He was admitted to the City Hospital three weeks later and the following record was made on April 21, 1903.