At least Alzheimer's patients do not know what is happening to their brains and bodies. Some say this makes Alzheimer's less terrible than ALS, where the patient understands everything. But if lack of comprehension is of some small blessing to the Alzheimer's victim, it does nothing to help the family. Care of the stricken spouse or parent can consume a family's time, energy and resources. Instead of enjoying retirement years, a husband or wife, whose own strength may be declining with age, can find every day consumed by care giving. Then there is the wrenching decision of whether to place the loved one in a nursing home, a decision that can result in enormous cost, not to mention guilt.