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Aging (biology)

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In biology, aging is defined as the "gradual irreversible changes in structure and function of an organism that occur as a result of the passage of time."[1]


A series of photos, taken daily over the course of 8 years. (CC) Photo series: Jonathan Keller — view on Vimeo

Cognition

For more information, see: cognition.

Normal aging

Decline in executive control may occur with aging.[2] Loss of nonverbal skills, which can be measured by tests of clock drawing[3], may be especially important.[4]

Dementia

For more information, see: dementia.


References

  1. ↑ Anonymous (2012), Aging (biology) (English). Medical Subject Headings. U.S. National Library of Medicine.
  2. ↑ Royall DR, Palmer R, Chiodo LK, Polk MJ (March 2004). "Declining executive control in normal aging predicts change in functional status: the Freedom House Study". J Am Geriatr Soc 52 (3): 346–52. PMID 14962147. [e]
  3. ↑ Royall, D.; Cordes J.; & Polk M. (1998). "CLOX: an executive clock drawing task". J Neurol Neurosurg Psychiatry 64 (5): 588-94. PMID 9598672. Full text at PubMed Central Example form
  4. ↑ Royall DR, Chiodo LK, Mouton C, Polk MJ (March 2007). "Cognitive predictors of mortality in elderly retirees: results from the Freedom House study". Am J Geriatr Psychiatry 15 (3): 243–51. DOI:10.1097/01.JGP.0000240824.84867.02. PMID 17322135. Research Blogging.
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