Résumés
Résumé
Le vieillissement normal est accompagné de modifications du fonctionnement cognitif. Les plus fréquentes touchent la mémoire, l’attention ou les habiletés visuospatiales. Des facteurs généraux et des facteurs spécifiques expliquent ces changements indicateurs du vieillissement cérébral. Ils ne sont cependant pas obligatoires, mais dépendent des réserves en ressources cognitives que les individus possèdent, et de la façon dont ils continuent à les entretenir et à les exploiter. Le cerveau est en effet un organe qui s’adapte si on le met dans de bonnes conditions. Il est donc possible de retarder les effets du vieillissement et, dans certains cas, de les moduler.
Summary
It is now well documented that normal aging modifies the cognitive functioning and most observations suggest that cognition evolves in the direction of deterioration. The more frequently impaired functions are memory, attention and visual-spatial abilities. On the other hand, some abilities seem to increase, such as vocabulary. Considering the aging effect on cognition, questions remain regarding directionality, universality and reversibility. A great variability in aged related impacts is observed among subjects and among cognitive domains. Some individuals evolved more rapidly than others. Some cognitive functions are more affected by aging than others. General and specific factors are hypothesized to explain the aged related cognitive decline. Among them, educational level, health, cognitive style, life style, personality, are likely to modulate the aged related cognitive evolution by influencing attentional resources and cerebral plasticity. Cognitive resources are essential to develop adaptative strategies. During the life span, resources are activated and increased by learning and training. Considering the role of cognitive resources, successful aging is dependent on several conditions : absence of disease leading to a loss of autonomy, maintenance of cognitive and physical activities, and active and social engaged lifestyle.
Parties annexes
Références
- 1. Van der Linden M, Hupet M. Le vieillissement cognitif. Paris : PUF, 1994.
- 2. Raz N. Aging and the brain and its impact on cognitive performance : integration of structural and functional findings. In : Craik FIM, Salthouse TA, eds. The handbook of aging and cognition. New Jersey : Lawrence Erlbaum Associates, 2000 : 1-90.
- 3. Studer M. Cognitive rehabilitation in the frail elderly patient never too old to learn? Topics Geriatr Rehabil 2004 ; 20 : 21-33.
- 4. Dixon RA. Themes in the aging of intelligence : Robust decline with intriguing possibilities. In : Sternberg, Robert J Lautrey J, eds. Models of intelligence : international perspectives. Washington, DC, US : American Psychological Association, 2003, XVI : 151-67.
- 5. Albert M, Duffy FH, Naeser M. Nonlinear changes in cognition with age and their neuropsychologic correlates. Can J Psychol 1987 ; 41 : 141-57.
- 6. Craik FIM. A functional account of age differences in memory. In : Klix F, Hagendorf H, eds. Human memory and cognitive capabilities : mechanism and performance, part A. Amsterdam : Elsevier, 1986 : 409-22.
- 7. Balota DA, Duchek JM. Age-related differences in lexical access, spreading activation, and simple pronunciation. Psychology Aging 1988 ; 3 : 84-93.
- 8. Verhaeghen P. Aging and vocabulary scores : a meta-analysis. Psychology Aging 2003 ; 18 : 332-9.
- 9. Light LL. Memory changes in adulthood. In : Qualls SH, Abeles N, eds. Psychology and the aging revolution : how we adapt to longer life. Washington, DC, US : American Psychological Association 2000, IX : 73-97.
- 10. Ylikoski R, Ylikoski A, Keskivaara P, et al. Heterogeneity of cognitive profiles in aging : successful aging, normal aging, and individuals at risk for cognitive decline. Eur J Neurol 1999 ; 6 : 645-52.
- 11. Valdois S, Joanette Y, Poissant A, et al. Heterogeneity in the cognitive profile of normal elderly. J Clin Exp Neuropsychol 1990 ; 12 : 587-96.
- 12. Van der Linden M, Hupet M, Feyereisen P, et al. Cognitive mediators of age-related differences in language comprehension and verbal memory performance. Aging Neuropsychology Cognition 1999 ; 6 : 32-55.
- 13. Baltes PB. On the incomplete architecture oh human ontogeny : selection, optimization, and compensation as foundation of developmental theory. Am Psychologist 1997 ; 52 : 366-80.
- 14. Seeman TE, Lusignolo TM, et al. Social relationships, social support, and patterns of cognitive aging in healthy, high-functioning older adults : MacArthur studies of successful aging. Health Psychology 2001 ; 20 : 243-55.
- 15. Rowe JW, Kahn RL. Successful aging. Gerontologist 1997 ; 37 : 433-40.
- 16. Parsons TD, Rizzo AR, van der Zaag C, et al. Gender differences and cognition among older adults. Aging0 Neuropsychology Cognition 2005 ; 12 : 78-88.
- 17. Bosworth HB, Schaie KW. The relationship of social environment, social networks, and health outcomes in the Seattle longitudinal study : two analytical approaches. J Gerontol Series B Psychological Sciences and Social Science 1997 ; 52 : 197-205.
- 18. Cohen-Zion M, Stepnowsky CM, Shochat T, et al. Changes in cognitive function associated with sleep disordered breathing in older. J Am Geriatr Soc 2001 ; 49 : 1622-7.
- 19. Herrera-Guzman I, Pena-Casanova J, Lara JP, et al. Influence of age, sex, and education on the Visual Object and Space Perception Battery (VOSP) in a healthy normal elderly population. Clin Neuropsychologist 2004 ; 18 : 385-94.
- 20. Newson RS, Kemps EB. General lifestyle activities as a predictor of current cognition and cognitive change in older adults : a cross-sectional and longitudinal examination. J Gerontol Series B Psychological Sciences and Social Science 2005 ; 60B : 113-20.
- 21. Weissman DH, Banich MT. The cerebral hemispheres cooperate to perform complex but not simple tasks. Neuropsychology 2000 ; 14 : 41-59.
- 22. Cabeza R. Hemispheric asymmetry reduction in older adults : the HAROLD model. Psychology Aging 2002 ; 17 : 85-100.
- 23. Cabeza R, Daselaar SM, Dolcos F, et al. Task-independent and task-specific age effects on brain activity during working memory, visual attention and episodic retrieval. Cerebral Cortex 2004 ; 14 : 364-75.
- 24. Le Carret N, Lafont S, Mayo W, Fabrigoule C. The effect of education on cognitive performances and its implication for the constitution of the cognitive reserve. Dev Neuropsychol 2003 ; 23 : 317-37.
- 25. Fabrigoule C. Do leisure activities protect against Alzheimer’s disease? Lancet Neurol 2002 ; 1 : 11.
- 26. Kramer AF, Willis SL. Enhancing the cognitive vitality of older adults. Curr Dir Psychol Sci 2002 ; 11 : 173-7.
- 27. Colcombe S, Kramer AF. Fitness effects on the cognitive function of older adults : a meta-analytic study. Psychol Sci 2003 ; 14 : 125-30.
- 28. McCurry SM, Gibbons LE, Bond GE, et al. Older adults and functional decline : a cross-cultural comparison. Int Psychogeriatr 2002 ; 14 : 161-79.
- 29. Baltes PB, Baltes MM. Psychological perspectives on successful aging : The model of selective optimization with compensation. In : Baltes PB, Baltes MM eds. Successful aging : perspectives from the behavioural sciences. Cambridge : Cambridge University Press, 1990 : 1-34.