Effect of auditory input on activations in infant diverse cortical regions during audiovisual processing.

摘要: A fundamental question with regard to perceptual development is how multisensory information processed in the brain during early stages of development. Although a growing body evidence has shown emergence modality-specific functional differentiation cortical regions, interplay between sensory inputs from different modalities developing not well understood. To study effects auditory input audio-visual processing 3-month-old infants, we evaluated spatiotemporal hemodynamic responses 50 infants while they perceived visual objects or without accompanying sounds. The were measured using 94-channel near-infrared spectroscopy over occipital, temporal, and frontal cortices. sound manipulation pervasive throughout diverse regions specific each region. Visual stimuli co-occurring induced early-onset activation region, followed by other regions. Removal stimulus resulted focal deactivation reduced association region temporal parietal cortices, anterior prefrontal suggesting interplay. In contrast, equivalent activations observed lateral occipital regardless manipulation. Our findings indicate that did generally enhance overall relation perception, but rather changes present implies may perceive global network functionally differentiated Hum Brain Mapp, 2013. © 2011 Wiley Periodicals, Inc.