参考图片 李桂艳说精神衰退是指曾经发育正常的精神智力能力由于各种非急性脑损害原因导致IQ值下降。见于慢性精神分裂症或单纯型精神分裂症。 它是以情感淡漠、意志缺乏，以及社交能力和创造性劳动能力的丧失为主要特征。是精神分裂症晚期的主要症状。
在精神衰退上的延迟能达到六个月对个人，他们的家庭和公众健康就已经相当有意义了。
Delays in mental decline of even up to six months are viewed as having considerable implications for individuals, their families and public health.
最终，这项研究报告将语言知识与减慢年龄相关的精神衰退诸如某种形式的痴呆联系起来。
Finally the study reports on research that links knowledge of languages to a slowdown of age-related mental diminishment such as certain forms of dementia.
目的：对长期住院精神分裂症患者实施社会功能训练，以提高其住院生活质量，延缓精神衰退。
Objective: To increase the quality of life in the hospital and delay mental deterioration of schizophrenic hospitalized long time through conducting social rehabilitation.
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