University of Tennessee Health Science Center.
Le Bonheur Children's Hospital, Memphis, TN.
J Cogn Neurosci. 2017 Oct;29(10):1755-1765. doi: 10.1162/jocn_a_01147. Epub 2017 May 30.
The results of this magnetoencephalography study challenge two long-standing assumptions regarding the brain mechanisms of language processing: First, that linguistic processing proper follows sensory feature processing effected by bilateral activation of the primary sensory cortices that lasts about 100 msec from stimulus onset. Second, that subsequent linguistic processing is effected by left hemisphere networks outside the primary sensory areas, including Broca's and Wernicke's association cortices. Here we present evidence that linguistic analysis begins almost synchronously with sensory, prelinguistic verbal input analysis and that the primary cortices are also engaged in these linguistic analyses and become, consequently, part of the left hemisphere language network during language tasks. These findings call for extensive revision of our conception of linguistic processing in the brain.
第一，语言处理本身遵循双侧初级感觉皮层的感觉特征处理，从刺激开始持续约 100 毫秒。第二，随后的语言处理是由初级感觉区域以外的左半球网络完成的，包括布罗卡区和韦尼克区的联合皮层。在这里，我们提供的证据表明，语言分析几乎与感觉、前语言的言语输入分析同步开始，初级皮层也参与这些语言分析，因此，在语言任务期间成为左半球语言网络的一部分。这些发现要求我们对大脑中的语言处理概念进行广泛的修正。
