The human spirit is different from physiological aging aging, it is a special form of aging. In general, the spirit of the spirit of the normal aging into senescence, two kinds of abnormal mental aging.
Normal aging into the spirit of true physiological aging and pathological aging, in most of the older people to see. Unusual mental aging into abnormal aging (accelerated physiological aging) and pathologic aging (disease outcome), can be seen in some elderly people.
The spirit of normal aging and abnormal aging is not the spirit of the clear dividing line. Typically, the medical profession will decrease mental and neurological functions, such as feeling, thinking, memory, emotional changes, and the resulting anxiety and other mental aging as the standard.
As the scope and spirit of aging is a relatively wide, so they need to use psychology, biology, clinical medicine and other disciplines to be integrated to judge.
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