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{{B}}Text{{/B}} Senility refers to great losses of intellectual capacity that occurs in old age and is{{U}} (26) {{/U}}with the wide- spread loss of nerve cells and the{{U}} (27) {{/U}}of brain tissue. Senility is a great decline from a previous intellectual{{U}} (28) {{/U}}in an aging person. Memory is the mental capacity most 6ften affected. The memory loss may first show itself clearly in simple absentmindedness or a (n){{U}} (29) {{/U}}to forget or{{U}} (30) {{/U}}things and repeal oneself in conversation.{{U}} (31) {{/U}}the senility progresses, the loss of memory{{U}} (32) {{/U}}in scope until the patient can no longer remember basic social and{{U}} (33) {{/U}}skills or{{U}} (34) {{/U}}independently. There may also be declines in the person's language skills, spatial or temporal orientation.{{U}} (35) {{/U}}or other cognitive{{U}} (36) {{/U}}and personality changes may also be{{U}} (37) {{/U}}to see. Senility usually has a slow, gradual onset and is{{U}} (38) {{/U}}common in persons over age 75. The most common{{U}} (39) {{/U}}of the syndrome is Alzheimer's disease, which{{U}} (40) {{/U}}for about 50 percent of all elderly persons with{{U}} (41) {{/U}}mind and is hard to restore a former state. The second most common cause is vascular senility which arise from hypertension (high blood pressure) or some other vascular condition. In this type, a series of small strokes (中风) progressively destroy small{{U}} (42) {{/U}}of the brain, eventually leading to senility. There is no{{U}} (43) {{/U}}for Alzheimer's disease, but vascular senility can{{U}} (44) {{/U}}be prevented or its{{U}} (45) {{/U}}slowed by treatment of the underlying systemic vascular disorder. Among other significant causes of senility in the elderly are Huntington's chorea, Parkinson's disease, and multiple sclerosis. |