Hemodynamic responses to speech and music in preverbal infants

FavaE.; HullR.; BaumbauerK.BortfeldH.

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Hemodynamic responses to speech and music in preverbal infants

机译：Hemodynamic responses to speech and music in preverbal infants

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Numerous studies have provided clues about the ontogeny of lateralization of auditory processing in humans, but most have employed specific subtypes of stimuli and/or have assessed responses in discrete temporal windows. The present study used near-infrared spectroscopy (NIRS) to establish changes in hemodynamic activity in the neocortex of preverbal infants (aged 4-11 months) while they were exposed to two distinct types of complex auditory stimuli (full sentences and musical phrases). Measurements were taken from bilateral temporal regions, including both anterior and posterior superior temporal gyri. When the infant sample was treated as a homogenous group, no significant effects emerged for stimulus type. However, when infants hemodynamic responses were categorized according to their overall changes in volume, two very clear neurophysiological patterns emerged. A high-responder group showed a pattern of early and increasing activation, primarily in the left hemisphere, similar to that observed in comparable studies with adults. In contrast, a low-responder group showed a pattern of gradual decreases in activation over time. Although age did track with responder type, no significant differences between these groups emerged for stimulus type, suggesting that the high- versus low-responder characterization generalizes across classes of auditory stimuli. These results highlight a new way to conceptualize the variable cortical blood flow patterns that are frequently observed across infants and stimuli, with hemodynamic response volumes potentially serving as an early indicator of developmental changes in auditory-processing sensitivity.

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《Child neuropsychology: a journal on normal and abnormal development in childhood and adolescence》 |2014年第4期|430-448|共19页
作者
FavaE.; HullR.; BaumbauerK.BortfeldH.;
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作者单位

Department of Psychology, University of Massachusetts Amherst, Amherst, MA, United States;

Department of Psychology, Texas AandM University, College Station, TX, United States;

Department of Neurobiology, University of Pittsburgh, Pittsburgh, PA, United StatesDepartment of Psychology, University of Connecticut, Storrs, CT, United States, Haskins;

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正文语种英语
中图分类个人卫生;
关键词
Infants; Lateralization; Music; Near-infrared Spectroscopy; Speech;

Hemodynamic responses to speech and music in preverbal infants

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