Altenmüller E
Department of Neurology, University of Tübingen.
Int J Neurosci. 1989 Jul;47(1-2):1-14. doi: 10.3109/00207458908987413.
Cortical activation during cognitive processing was assessed with a new, noninvasive electrophysiological method: Cortical DC-potentials were recorded from frontal, central, temporal and parietal electrode positions on the scalps of 150 normal adult subjects while they performed cognitive tasks involving language, calculation, music and spatial vision. During the 10-s registration period, shifts in DC-potentials were analyzed with reference to a baseline 3-s preperiod. 15-30 trials were averaged. A lateralized preponderance of negativity by more than 3 microV was used as the criterion of hemispheric dominance. Language tasks caused left-sided lateralization in 76% of the right-handers (n = 80), bilaterally equal surface negativity in 15% and right-sided lateralization in 9%. During the same tasks, 22% of the left-handers (n = 45) had right-sided lateralization. Calculation tasks produced left-sided lateralization in 65% of the right-handers and left-handers. Music tasks caused more right-sided (53%) than left-sided (39%) lateralization dependent on musical training. Visuospatial processing yielded a right temporoparietal lateralization in 77%.
在150名正常成年受试者执行涉及语言、计算、音乐和空间视觉的认知任务时，从其头皮上的额、中央、颞和顶电极位置记录皮质直流电位。在10秒的记录期内，参照3秒的前期基线分析直流电位的变化。对15 - 30次试验的结果进行平均。以超过3微伏的负性优势侧化为半球优势的标准。语言任务使76%的右利手（n = 80）出现左侧化，15%表现为双侧表面负性相等，9%出现右侧化。在相同任务中，22%的左利手（n = 45）出现右侧化。计算任务使65%的右利手和左利手出现左侧化。音乐任务导致右侧化（53%）比左侧化（39%）更多，这取决于音乐训练情况。视觉空间加工在77%的情况下产生右侧颞顶叶侧化。
