Electrophysiological Signals of Familiarity and Recency in the Infant Brain

Autor/inn/en	Snyder, Kelly A.; Garza, John; Zolot, Liza; Kresse, Anna
Titel	Electrophysiological Signals of Familiarity and Recency in the Infant Brain
Quelle	In: Infancy, 15 (2010) 5, S.487-516 (30 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1525-0008
DOI	10.1111/j.1532-7078.2009.00021.x
Schlagwörter	Stimuli; Familiarity; Infants; Recognition (Psychology); Long Term Memory; Novelty (Stimulus Dimension); Brain; Physiology; Neurology; Diagnostic Tests; Animals; Brain Hemisphere Functions; Visual Perception + Suchen Sie Ihr Suchwort? Anreizsystem; Infant; Toddler; Toddlers; Kleinkind; Recognition; Wiedererkennen; Langzeitgedächtnis; Gehirn; Physiologie; Neurologie; Diagnostic test; Diagnostischer Test; Animal; Tier; Tiere; Visuelle Wahrnehmung
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 their natural environments into long-term memory, and can discriminate between familiar and unfamiliar items, and between recently seen and new items, very quickly (within 1 sec). They also suggest that infants represent information about not only whether a stimulus is familiar or unfamiliar but also whether it has been seen recently. (Contains 6 figures.) (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10