Neural signatures of recognition memory in 10- to 12-month-old infants

Linnert, Szilvia and Tóth, Brigitta and Nagy, Márton and Parise, Eugenio and Király, Ildikó (2017) Neural signatures of recognition memory in 10- to 12-month-old infants. Neuropsychologia, 126. pp. 75-81. ISSN 0028-3932

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Abstract

Understanding memory mechanisms is crucial in the study of infant social and cognitive development. Here, we show that the Nc ERP component, known to reflect frequency-related attentional and/or memory processes, is a good candidate to investigate infant recognition memory. Previous paradigms have only investigated the effect of frequency during on-line stimulus presentation, but not during stimulus encoding. In this paper, we present a novel method for measuring the neural correlates of recognition memory and the ‘degree’ of familiarity in 10- to 12-month-old infants. During a familiarization phase, two images were presented frequently, while another two images were presented infrequently to the infants. In the test phase, the infrequent familiar, the frequent familiar, and the novel stimuli, were all presented with equal probability. We found larger Nc amplitudes following the familiar stimuli compared to the novel ones. The ‘degree’ of familiarity, on the other hand, did not modulate the Nc amplitude. These results can only be explained with memory-related processes, since in our paradigm the on-line presentation frequency did not vary. Furthermore, the lack of familiarization frequency effect suggests that the Nc might be a neural correlate of declarative memory.

Item Type:
Journal Article
Journal or Publication Title:
Neuropsychologia
Additional Information:
This is the author’s version of a work that was accepted for publication in Neuropsychologia. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Neuropsychologia, 126, 2019 DOI: 10.1016/j.neuropsychologia.2017.08.023
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3200/3205
Subjects:
ID Code:
87409
Deposited By:
Deposited On:
21 Aug 2017 15:26
Refereed?:
Yes
Published?:
Published
Last Modified:
05 Jul 2020 05:52