Abstract：
:In human adults, voices are processed in specialized brain regions in superior temporal cortices. We examined the development of this cortical organization during infancy by using near-infrared spectroscopy. In experiment 1, 7-month-olds but not 4-month-olds showed increased responses in left and right superior temporal cortex to the human voice when compared to nonvocal sounds, suggesting that voice-sensitive brain systems emerge between 4 and 7 months of age. In experiment 2, 7-month-old infants listened to words spoken with neutral, happy, or angry prosody. Hearing emotional prosody resulted in increased responses in a voice-sensitive region in the right hemisphere. Moreover, a region in right inferior frontal cortex taken to serve evaluative functions in the adult brain showed particular sensitivity to happy prosody. The pattern of findings suggests that temporal regions specialize in processing voices very early in development and that, already in infancy, emotions differentially modulate voice processing in the right hemisphere.
journal_name
Neuronjournal_title
Neuronauthors
Grossmann T,Oberecker R,Koch SP,Friederici ADdoi
10.1016/j.neuron.2010.03.001subject
Has Abstractpub_date
2010-03-25 00:00:00pages
852-8issue
6eissn
0896-6273issn
1097-4199pii
S0896-6273(10)00170-4journal_volume
65pub_type
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