Arousal modulation of memory and amygdala-parahippocampal connectivity: a PET-psychophysiology study in specific phobiaShow others and affiliations
2011 (English)In: Psychophysiology, ISSN 1540-5958, Vol. 48, no 11, p. 1463-1469Article in journal (Refereed) Published
Abstract [en]
Phobic fear is accompanied by intense bodily responses modulated by the amygdala. An amygdala moderated psychophysiological measure related to arousal is electrodermal activity. We evaluated the contributions of electrodermal activity to amygdala-parahippocampal regional cerebral blood flow (rCBF) during phobic memory encoding in subjects with spider or snake phobia. Recognition memory was increased for phobia-related slides and covaried with rCBF in the amygdala and the parahippocampal gyrus. The covariation between parahippocampal rCBF and recognition was related to electrodermal activity suggesting that parahippocampal memory processes were associated with sympathetic activity. Electrodermal activity further mediated the amygdala effect on parahippocampal activity. Memory encoding during phobic fear therefore seems contingent on amygdala's influence on arousal and parahippocampal activity.
Place, publisher, year, edition, pages
John Wiley & Sons, 2011. Vol. 48, no 11, p. 1463-1469
National Category
Neurosciences
Identifiers
URN: urn:nbn:se:miun:diva-38902DOI: 10.1111/j.1469-8986.2011.01231.xISI: 000295961700001PubMedID: 21729104Scopus ID: 2-s2.0-80053563137OAI: oai:DiVA.org:miun-38902DiVA, id: diva2:1423388
2020-04-142020-04-142020-04-17Bibliographically approved