Doppelmayr M, Klimesch W, Schwaiger J, Auinger P, Winkler T
University of Salzburg, Department of Physiological Psychology, Institute of Psychology, Austria.
Neurosci Lett. 1998 Nov 20;257(1):41-4. doi: 10.1016/s0304-3940(98)00805-2.
Event-related desynchronization (ERD) and synchronization (ERS) was measured during episodic retrieval in a specially designed recognition task which forces subjects to avoid semantic search strategies. ERD represents the percentage of a decrease, ERS an increase in band power. The results show that only the theta band differentiates between good and bad episodic memory performers and that good performance is related to a large degree of theta synchronization. The delta and alpha bands did not yield significant effects. Topographical differences in theta ERS reveal that good performers use primarily their right hemisphere to retrieve episodic information. This finding agrees with respective results from PET studies.
在一项特别设计的识别任务的情景检索过程中，对事件相关去同步化（ERD）和同步化（ERS）进行了测量，该任务迫使受试者避免语义搜索策略。ERD代表频段功率下降的百分比，ERS代表频段功率增加的百分比。结果表明，只有θ频段能够区分情景记忆表现好与差的受试者，并且良好的表现与较大程度的θ同步化有关。δ频段和α频段未产生显著影响。θ ERS的地形差异表明，表现好的受试者主要使用其右半球来检索情景信息。这一发现与PET研究的相应结果一致。
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