Electrophysiological Signals of Familiarity and Recency in the Infant Brain

Infancy : the Official Journal of the International Society on Infant Studies
Kelly A SnyderAnna Kresse

Abstract

Electrophysiological work in nonhuman primates has established the existence of multiple types of signals in the temporal lobe that contribute to recognition memory, including information regarding a stimulus's relative novelty, familiarity, and recency of occurrence. We used high-density event-related potentials (ERPs) to examine whether young infants represent these distinct types of information about previously experienced items. Twenty-four different highly familiar and initially novel items were each repeated exactly once either immediately (Experiment 1), or following one intervening item (Experiment 2). A late slow wave (LSW) component of the ERP exhibited neural responses consistent with recency signals over right-central leads, but only when there were no intervening stimuli between repetitions. The LSW also exhibited responses consistent with familiarity signals over anterior-temporal leads, but only when there were intervening stimuli between repetitions. A mid-latency negative component (i.e., the Nc) also distinguished familiar from novel items, but did not exhibit a pattern of responding consistent with familiarity signals. These findings suggest that infants encode information about a variety of objects from thei...Continue Reading

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Citations

Jun 15, 2011·Infancy : the Official Journal of the International Society on Infant Studies·Greg D ReynoldsDantong Zhang
Jun 4, 2014·Psychophysiology·Stefanie PeykarjouStefanie Hoehl
Oct 21, 2017·Child Development·Greg D Reynolds, John E Richards
Mar 16, 2018·Frontiers in Psychology·Greg D Reynolds, Kelly C Roth
Feb 21, 2013·Developmental Psychobiology·Greg D ReynoldsMaggie W Guy
May 2, 2012·Developmental Neuropsychology·Manuela StetsVincent M Reid
Sep 15, 2012·Developmental Psychobiology·Michael Kavšek
Mar 16, 2017·Developmental Psychobiology·Maggie W GuyKate C Dixon
Feb 1, 2019·Translational Psychiatry·Anna KolesnikUNKNOWN BASIS Team

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