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首页> 外文期刊>The European Journal of Neuroscience >Prediction of memory formation based on absolute electroencephalographic phases in rhinal cortex and hippocampus outperforms prediction based on stimulus-related phase shifts
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Prediction of memory formation based on absolute electroencephalographic phases in rhinal cortex and hippocampus outperforms prediction based on stimulus-related phase shifts

机译：基于刺激相关相移的rhint Cortex和海马的绝对脑电图相的记忆形成预测

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摘要

Absolute (i.e. measured) rhinal and hippocampal phase values are predictive for memory formation. It has been an open question, whether the capability of mediotemporal structures to react to stimulus presentation with phase shifts may be similarly indicative of successful memory formation. We analysed data from 27 epilepsy patients implanted with depth electrodes in the hippocampus and entorhinal cortex, who performed a continuous word recognition task. Electroencephalographic phase information related to the first presentation of repeatedly presented words was used for prediction of subsequent remembering vs. forgetting applying a support vector machine. The capability to predict successful memory formation based on stimulus-related phase shifts was compared to that based on absolute phase values. Average hippocampal phase shifts were larger and rhinal phase shifts were more accumulated for later remembered compared to forgotten trials. Nevertheless, prediction based on absolute phase values clearly outperformed phase shifts and there was no significant increase in prediction accuracies when combining both measures. Our findings indicate that absolute rhinal and hippocampal phases and not stimulus-related phase shifts are most relevant for successful memory formation. Absolute phases possibly affect memory formation via influencing neural membrane potentials and thereby controlling the timing of neural firing.
机译：绝对（即测量的）螯合和海马相值是对记忆形成的预测性。它已经是一个开放的问题，中瞳孔结构是否与相移刺激呈响作出反应的能力可能类似地指示成功的记忆形成。我们分析了植入海马和Entorthinal皮质中深度电极的27例癫痫患者的数据，他们进行了连续的Word识别任务。与重复呈现的单词的第一个呈现相关的脑电图相信息用于预测随后的记忆与遗忘应用支持向量机器。将基于刺激相关相移预测成功存储器形成的能力与基于绝对相位值进行比较。与被遗忘的试验相比，平均海马移相移越大，rhink阶段移位更加积累，以便以后记住。然而，基于绝对相值的预测显然优于相移相移，并且在组合这两个措施时，预测精度没有显着增加。我们的研究结果表明，绝对的rhinal和海马阶段而不是刺激相关的相移对成功的内存形成最相关。绝对阶段可能影响通过影响神经膜电位的记忆形成，从而控制神经烧制的时序。

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