Dissociable Contributions of the Amygdala to the Immediate and Delayed Effects of Emotional Arousal on Memory

Autor/inn/en	Schümann, Dirk; Sommer, Tobias
Titel	Dissociable Contributions of the Amygdala to the Immediate and Delayed Effects of Emotional Arousal on Memory
Quelle	In: Learning & Memory, 25 (2018) 6, S.283-293 (11 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1072-0502
DOI	10.1101/lm.047282.117
Schlagwörter	Brain Hemisphere Functions; Emotional Response; Arousal Patterns; Memory; Females; Correlation; Stimuli; Genetics; Recognition (Psychology); Foreign Countries; Germany + Suchen Sie Ihr Suchwort? Emotionales Verhalten; Gedächtnis; Weibliches Geschlecht; Korrelation; Anreizsystem; Humangenetik; Recognition; Wiedererkennen; Ausland; Deutschland
Abstract	Emotional arousal enhances memory encoding and consolidation leading to better immediate and delayed memory. Although the central noradrenergic system and the amygdala play critical roles in both effects of emotional arousal, we have recently shown that these effects are at least partly independent of each other, suggesting distinct underlying neural mechanisms. Here we aim to dissociate the neural substrates of both effects in 70 female participants using an emotional memory paradigm to investigate how neural activity, as measured by fMRI, and a polymorphism in the a[subscript 2B]-noradrenoceptor vary for these effects. To also test whether the immediate and delayed effects of emotional arousal on memory are stable traits, we invited back participants who were a part of a large-scale behavioral memory study ~3.5 yr ago. We replicated the low correlation of the immediate and delayed emotional enhancement of memory across participants (r = 0.16) and observed, moreover, that only the delayed effect was, to some degree, stable over time (r = 0.23). Bilateral amygdala activity, as well as its coupling with the visual cortex and the fusiform gyrus, was related to the preferential encoding of emotional stimuli, which is consistent with affect-biased attention. Moreover, the adrenoceptor genotype modulated the bilateral amygdala activity associated with this effect. The left amygdala and its coupling with the hippocampus was specifically associated with the more efficient consolidation of emotional stimuli, which is consistent with amygdalar modulation of hippocampal consolidation. (As Provided).
Anmerkungen	Cold Spring Harbor Laboratory Press. 500 Sunnyside Boulevard, Woodbury, NY 11797-2924. Tel: 800-843-4388; Tel: 516-367-8800; Fax: 516-422-4097; e-mail: cshpres@cshl.edu; Web site: http://learnmem.cshlp.org
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2020/1/01