Cerebral specialization for speech and non-speech stimuli in infants
Cerebral specialization for speech and non-speech stimuli in infants
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DOI：
10.1162/089892900562264
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发表时间：
2000-05-01
影响因子：
3.2
通讯作者：
Dehaene-Lambertz, G
中科院分区：
文献类型：
--
作者：
Dehaene-Lambertz, G
通过记录一系列重复刺激（音调或音节）中声学和语音变化的高密度诱发电位，研究了 4 个月大婴儿听觉处理的早期大脑专门化和偏侧化。对这些刺激的不匹配反应表现出独特的拓扑结构，表明颞叶内的不同神经网络参与听觉刺激不同特征的感知和表征。这些数据证实，听觉皮层在发育的早期就存在专门的模块。然而，对于音节和连续音调，左半球记录到的电压高于右半球，并且刺激类型与半球没有显着的相互作用。这表明，在生命的最初几个月里，左半球对语音处理的参与并不比对声学处理的参与更多。
Early cerebral specialization and lateralization for auditory processing in 4-month-old infants was studied by recording high-density evoked potentials to acoustical and phonetic changes in a series of repeated stimuli (either tones or syllables). Mismatch responses to these stimuli exhibit a distinct topography suggesting that different neural networks within the temporal lobe are involved in the perception and representation of the different features of an auditory stimulus. These data confirm that specialized modules are present within the auditory cortex very early in development. However, both for syllables and continuous tones, higher voltages were recorded over the left hemisphere than over the right with no significant interaction of hemisphere by type of stimuli. This suggests that there is no greater left hemisphere involvement in phonetic processing than in acoustic processing during the first months of life.