Auditory recognition memory in 2-month-old infants as assessed by event-related potentials.
Previous studies of auditory recognition memory in sleeping newborns reported 2 event-related potential (ERP) components, P2 and negative slow wave (NSW), reflecting voice discrimination and detection of novelty, respectively. In the present study, using high-density recording arrays, ERPs were acquired from 26 2-month-old awake infants as they were presented with a familiar and unfamiliar voice (i.e., mother and stranger) with equal probability. In addition to P2 and NSW, we observed a positive slow wave (PSW) over the right temporo-parietal scalp, indicating memory updating. Our study suggests that infants appear to have the capacity to encode novel stimuli as early as 2 months of age.
Center for Human Growth and Development, University of Michigan, Ann Arbor, Michigan, USA.
Xiaoqin
X
Mai
Lin
L
Xu
Mingyan
M
Li
Jie
J
Shao
Zhengyan
Z
Zhao
Raye-Ann
RA
deRegnier
Charles A
CA
Nelson
Betsy
B
Lozoff
D000161:Acoustic Stimulation; D001288:Attention / Q000502:physiology; D001307:Auditory Perception / Q000502:physiology*; D001931:Brain Mapping; D002540:Cerebral Cortex / Q000502:physiology*; D004569:Electroencephalography; D005071:Evoked Potentials / Q000502:physiology*; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D021641:Recognition, Psychology / Q000502:physiology*