%0 Journal Article
%T Memory for Emotional Pictures in Patients with Alzheimer's Dementia: Comparing Picture-Location Binding and Subsequent Recognition
%A Marloes J. Huijbers
%A Heiko C. Bergmann
%A Marcel G. M. Olde Rikkert
%A Roy P. C. Kessels
%J Journal of Aging Research
%D 2011
%I Hindawi Publishing Corporation
%R 10.4061/2011/409364
%X Emotional content typically facilitates subsequent memory, known as the emotional enhancement effect. We investigated whether emotional content facilitates spatial and item memory in patients with Alzheimer's dementia (AD). Twenty-three AD patients, twenty-three healthy elderly, and twenty-three young adults performed a picture relocation task and a delayed recognition task with positive, negative, and neutral stimuli. AD patients showed a benefit in immediate spatial memory for positive pictures, while healthy young and older participants did not benefit from emotional content. No emotional enhancement effects on delayed item recognition were seen. We conclude that AD patients may have a memory bias for positive information in spatial memory. Discrepancies between our findings and earlier studies are discussed. 1. Introduction There is abundant evidence that emotional events can be preserved in memory, even in patients with memory deficits. For example, amnesic patients could remember details of the terrorist attack of 9/11, 2001, while already suffering from profound anterograde amnesia at the time of the event [1]. This effect is generally referred to as the ˇ°emotional enhancement effectˇ± [2]. Several experiments have shown that the emotional content of both pictures [3, 4] and words [5¨C7] facilitates subsequent memory for these items, although pictures evoke more arousal than words [8]. Furthermore, although enhancing effects of both valence (the subjective experience of a stimulus as positive or negative to a certain extent) [7] and arousal (physiological and psychological excitement evoked by the stimulus) have been demonstrated, most robust findings have been found when using highly arousing pictures (cf. [4]). Fleming et al. [9] speculated that there may be an evolutionary advantage to not becoming overwhelmed by emotional stimuli at the time of the event, because it would interfere with survival instincts, but rather to recall and retain the information after a delay. Indeed, emotional arousal has been reported to impair task performance in a short-term memory task, but to enhance subsequent long-term memory for the emotional items compared with neutral ones [8]. Bower [10] suggested that emotional stimuli ˇ°consumeˇ± cognitive resources because of their attention-grabbing nature and therefore hamper short-term memory functioning. Evidence suggests that emotionally arousing stimuli attract attention already in the early perceptual stages. For example, both young and older adults notice threatening stimuli (e.g., pictures of dangerous animals)
%U http://www.hindawi.com/journals/jar/2011/409364/