Krause Christina M, Pesonen Mirka, Hämäläinen Heikki
Cognitive Science, Institute of Behavioral Sciences, University of Helsinki, Finland.
Neuroreport. 2010 Aug 4;21(11):767-71. doi: 10.1097/WNR.0b013e32833bfcbb.
Brain oscillatory responses of the 4-30 Hz electroencephalogram frequencies were assessed in 12 adolescents (mean age 14 years) during a visual N-back task with four memory load conditions (0-back, 1-back, 2-back, and 3-back). Theta frequency range (approximately 4-6 Hz) responses were elicited in all memory load conditions. The magnitude and duration of alpha frequency range (approximately 8-12 Hz) responses varied as a function of memory load. Beta frequency range (approximately 15-20 Hz) responses were modulated by both task difficulty and cognitive strategy. The differences between the memory load conditions were most prominent between the 0-back and 1-back conditions in the approximately 10 and 20 Hz electroencephalogram frequencies. Dynamic alpha and beta rhythm brain oscillatory responses are related to the cognitive processes in adolescence.
在一项具有四种记忆负荷条件（0-back、1-back、2-back和3-back）的视觉n-back任务中，对12名青少年（平均年龄14岁）4-30Hz脑电图频率的脑振荡反应进行了评估。在所有记忆负荷条件下均诱发了theta频率范围（约4-6Hz）的反应。alpha频率范围（约8-12Hz）反应的幅度和持续时间随记忆负荷而变化。beta频率范围（约15-20Hz）的反应受任务难度和认知策略的调节。在约10Hz和20Hz脑电图频率下，0-back和1-back条件之间的记忆负荷条件差异最为显著。动态alpha和beta节律脑振荡反应与青少年的认知过程有关。
