Hämmerer, D;
Hopkins, A;
Betts, MJ;
Maaß, A;
Dolan, RJ;
Düzel, E;
(2017)
Emotional arousal and recognition memory are differentially reflected in pupil diameter responses during emotional memory for negative events in younger and older adults.
Neurobiology of Aging
, 58
pp. 129-139.
10.1016/j.neurobiolaging.2017.06.021.
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Abstract
A better memory for negative emotional events is often attributed to a conjoint impact of increased arousal and noradrenergic modulation (NA). A decline in NA during aging is well documented but its impact on memory function during aging is unclear. Using pupil diameter (PD) as a proxy for NA, we examined age differences in memory for negative events in younger (18-30 years) and older (62-83 years) adults based on a segregation of early arousal to negative events, and later retrieval-related PD responses. In keeping with the hypothesis of reduced age-related NA influences, older adults showed attenuated induced PD responses to negative emotional events. The findings highlight a likely contribution of NA to negative emotional memory, mediated via arousal that may be compromised with aging.
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