Pulvermuller F, Preissl H, Lutzenberger W, Birbaumer N
Intitut für Medizinische Psychologie und Verhaltensneurobiologie, Universität Tübingen, 72074 Tübingen, Germany.
Eur J Neurosci. 1996 May;8(5):937-41. doi: 10.1111/j.1460-9568.1996.tb01580.x.
Electrocortical activity was recorded from scalps of human subjects reading nouns and verbs. Current source density analysis of EEG signals and calculation of spectral responses revealed differences between word categories in the 30 Hz range. Verbs elicited stronger 30 Hz activity at recording sites over the motor cortices, while nouns elicited stronger responses at sites over visual cortices in the occipital lobes. Behavioural testing indicated that, at the cognitive level, this double dissociation corresponds to motor and visual associations prompted by verbal stimuli. These results suggest that local high-frequency brain responses can be indicators of conscious processing of motor and visual associations of verbal material. Furthermore, the results provide additional evidence that nouns and verbs have distinct neuronal generators in the intact human brain.
从阅读名词和动词的人类受试者头皮记录皮层电活动。脑电图信号的电流源密度分析和频谱响应计算揭示了30赫兹范围内词类之间的差异。动词在运动皮层上方的记录部位引发更强的30赫兹活动，而名词在枕叶视觉皮层上方的部位引发更强的反应。行为测试表明，在认知层面，这种双重分离对应于言语刺激引发的运动和视觉联想。这些结果表明，局部高频脑反应可以作为言语材料运动和视觉联想意识加工的指标。此外，结果提供了额外证据，证明名词和动词在完整的人脑中具有不同的神经元发生器。
