Relationship between cortisol reactivity to psychosocial stress and declarative memory decline during aging: Impact of age and sex.

AIM: To analyze the relationship between memory performance and the neuroendocrine and cardiovascular response to acute psychosocial stress in healthy older people, and the sex and age impact in this relationship. METHODS: We randomly selected 100 literate older adults, without cognitive or functional impairment. The neuroendocrine stress response was evaluated by measuring the concentration of salivary cortisol, whereas cardiovascular reactions were determined based on blood pressure and heart rate measures taken before, during and after participant exposure to an acute psychosocial stressor (the Trier social stress test [TSST]). Memory performance was evaluated by applying the word pairs test before and after the TSST. RESULTS: A significant reduction in the word pair test scores was observed after the TSST, and a negative correlation between cortisol concentration and immediate and delayed recall of the word pair. Cortisol concentration associated with age, sex and education explained memory performance variability before and after the TSST. CONCLUSIONS: The results showed that the influence of acute stress on memory performance during aging might vary according to age and sex, highlighting potential differences in the vulnerability of older individuals to the neurotoxic effects of stress exposure on memory and consequently on the development of cognitive disorders. Geriatr Gerontol Int 2018; 18: 169-176.

[Subjective memory complain in healthy elderly: influence of depressive symptoms, perceived stress and self-esteem]. / Queixa subjetiva de comprometimento da memória em idosos saudáveis: influência de sintomas depressivos, percepção de estresse e autoestima.

The current study analyzed the relationship between perceived stress, depressive symptoms and self-esteem in elderly with and without subjective memory complain. Two-hundred four elderly were included (104 without and 100 with subjective memory complain) assesse using the Memory Assessment Complain Questionnaire (MAC-Q). The study protocol was composed by the Perceived Stress Scale (PSS), the Geriatric Depression Scale (GDS) and the Self-Esteem Scale of Rosenberg (SES). The elderly with subjective memory complain showed higher PSS and GDS scores (p < 0.001) and lower SES scores (p = 0.045). Negative correlation was observed between MAC-Q and PSS (p < 0.001) and GDS (p = 0.01). Multiple regression analysis showed predictor effect of perceived stress in the subjective memory complain. These findings suggest that the perceived stress and depressive symptoms are associated with subjective memory complain in elderly.