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The effects of noradrenergic re-uptake inhibition on memory encoding in man

Papps, BP; Shajahan, PM; Ebmeier, KP; O'Carroll, RE; (2002) The effects of noradrenergic re-uptake inhibition on memory encoding in man. PSYCHOPHARMACOLOGY , 159 (3) 311 - 318. 10.1007/s00213-001-0924-y.

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Abstract

Rationale: Animal and human evidence implicate the central noradrenergic system in the process of memory modulation for emotional material. Blockade of the beta-adrenergic system in humans has been shown to result in decreased recall and recognition memory performance, relative to placebo, for the emotional elements of a series of slides accompanied by a narrative. Stimulation of the noradrenergic system with yohimbine has also been shown to result in increased recall and recognition performance relative to placebo for the same stimulus materials. Objectives: The present study, tested the hypothesis that stimulating the central noradrenergic system using the new noradrenaline re-uptake inhibitor reboxetine would result in a dose-dependent enhancement of memory for emotional material in man. Methods: The central noradrenergic system was manipulated using reboxetine in a double-blind, randomised between-group, placebo-controlled design with 36 healthy adult subjects in each of three groups (placebo, 4 and 8 mg reboxetine). Free recall and recognition memory performance were assessed in a 'surprise' memory test following a 7-day interval. Results: We found no memory enhancing effect of reboxetine. In contrast we observed a dose-dependent effect on memory opposite to the predicted direction. There were no significant differences between groups in self-rated stress and arousal scores or self-rated emotional reactions to the stimuli. All groups showed the expected increased memory performance for the middle 'emotive' phase of the story Conclusion: Selective stimulation of the central nor-adrenergic system at encoding did not result in enhanced long-term memory for emotional material in man.

Type:Article
Title:The effects of noradrenergic re-uptake inhibition on memory encoding in man
DOI:10.1007/s00213-001-0924-y
Keywords:emotion, arousal, episodic, recall, recognition, BRAIN NOREPINEPHRINE CONCENTRATIONS, STATE-DEPENDENT RETRIEVAL, EPINEPHRINE MODULATION, EMOTIONAL MATERIAL, RETENTION, STIMULATION, PERFORMANCE, REBOXETINE, YOHIMBINE, AMYGDALA
UCL classification:UCL > School of Life and Medical Sciences > Faculty of Brain Sciences > Psychology and Language Sciences (Division of) > Institute of Cognitive Neuroscience
UCL > School of Life and Medical Sciences > Faculty of Life Sciences

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