THOMAS HODGE MCGAVACK, M.D., F.A.C.P.
Aging may be conceived as having two major phases: one, of evolution, growth and development; the other, of involution, degeneration and senescence. Our present concern is with the latter. Involutionary changes do not begin at any specific or given age, but proceed in more or less orderly fashion into senescence and death. Minot1 looked upon senescence as the natural result and end of the growth process. It is difficult to determine which processes in the aging individual result from heredity, which from the passage of years and which from the various stresses that are encountered throughout life. The menopause in
MCGAVACK TH. ENDOCRINE PATTERNS DURING AGING1. Ann Intern Med. 1951;35:961–974. doi: 10.7326/0003-4819-35-5-961
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Published: Ann Intern Med. 1951;35(5):961-974.
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