Journal
NEUROBIOLOGY OF AGING
Volume 45, Issue -, Pages 178-189Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.neurobiolaging.2016.05.019
Keywords
Memory; Aging; Sleep; Affect; Emotional bias; Consolidation
Categories
Funding
- NIH [R01 AG040133]
- Commonwealth Honors College
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Age-related memory decline has been proposed to result partially from impairments in memory consolidation over sleep. However, such decline may reflect a shift toward selective processing of positive information with age rather than impaired sleep-related mechanisms. In the present study, young and older adults viewed negative and neutral pictures or positive and neutral pictures and underwent a recognition test after sleep or wake. Subjective emotional reactivity and affect were also measured. Compared with waking, sleep preserved valence ratings and memory for positive but not negative pictures in older adults and negative but not positive pictures in young adults. In older adults, memory for positive pictures was associated with slow wave sleep. Furthermore, slow wave sleep predicted positive affect in older adults but was inversely related to positive affect in young adults. These relationships were strongest for older adults with high memory for positive pictures and young adults with high memory for negative pictures. Collectively, these results indicate preserved but selective sleep-dependent memory processing with healthy aging that may be biased to enhance emotional well-being. (C) 2016 Elsevier Inc. All rights reserved.
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