title: Using fNIRS to examine occipital and temporal responses to stimulus repetition in young infants: Evidence of selective frontal cortex involvement.
abstract: How does the developing brain respond to recent experience? Repetition suppression (RS) is a robust and well-characterized response of to recent experience found, predominantly, in the perceptual cortices of the adult brain. We use functional near-infrared spectroscopy (fNIRS) to investigate how perceptual (temporal and occipital) and frontal cortices in the infant brain respond to auditory and visual stimulus repetitions (spoken words and faces). In Experiment 1, we find strong evidence of repetition suppression in the frontal cortex but only for auditory stimuli. In perceptual cortices, we find only suggestive evidence of auditory RS in the temporal cortex and no evidence of visual RS in any ROI. In Experiments 2 and 3, we replicate and extend these findings. Overall, we provide the first evidence that infant and adult brains respond differently to stimulus repetition. We suggest that the frontal lobe may support the development of RS in perceptual cortices.
authors.affiliation: Princeton University, United States. Electronic address: lauren.emberson@gmail.com.
authors.forename: Lauren L
authors.initials: LL
authors.lastname: Emberson
authors.affiliation: University of Houston, United States.
authors.forename: Grace
authors.initials: G
authors.lastname: Cannon
authors.affiliation: University of Rochester, United States.
authors.forename: Holly
authors.initials: H
authors.lastname: Palmeri
authors.affiliation: University of South Carolina, United States.
authors.forename: John E
authors.initials: JE
authors.lastname: Richards
authors.affiliation: University of Rochester, United States.
authors.forename: Richard N
authors.initials: RN
authors.lastname: Aslin
mesh_terms: D000161:Acoustic Stimulation / Q000379:methods; D000328:Adult; D001931:Brain Mapping / Q000379:methods; D002657:Child Development / Q000502:physiology*; D005260:Female; D005625:Frontal Lobe / Q000502:physiology*; D006801:Humans; D007223:Infant; D008297:Male; D009778:Occipital Lobe / Q000502:physiology*; D010775:Photic Stimulation / Q000379:methods; D019265:Spectroscopy, Near-Infrared / Q000379:methods*; D013702:Temporal Lobe / Q000502:physiology*
keywords: Auditory; Cross-modal; Faces; Frontal cortex; Repetition suppression; Speech; Visual; Words; fNIRS