Journal
NEUROBIOLOGY OF AGING
Volume 23, Issue 1, Pages 1-11Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/S0197-4580(01)00247-0
Keywords
aging; disease; complexity; dynamics; endocrinology; motor control; cardiovascular physiology; neurophysiology
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Funding
- EUNICE KENNEDY SHRIVER NATIONAL INSTITUTE OF CHILD HEALTH &HUMAN DEVELOPMENT [R01HD021212] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE ON AGING [T32AG000048] Funding Source: NIH RePORTER
- NIA NIH HHS [T32-AG00048] Funding Source: Medline
- NICHD NIH HHS [R01-HD21212] Funding Source: Medline
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Lipsitz and Goldberger [47] proposed that there is a loss in the complexity of physiological and behavioral systems with aging and disease. Here, we show that this unidirectional view of the change in system complexity is too narrow in its consideration of the actual changes that occur with aging and disease. An increase or decrease in the complexity of a behavioral or physiological system output can occur and the direction of change is dependent on the confluence of constraints that channel the system dynamics. It is postulated that the observed increase or decrease in complexity with aging and disease is dependent on the nature of both the intrinsic dynamics of the system and the short-term change required to realize a local task demand. (C) 2002 Elsevier Science Inc. All rights reserved.
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