Department of Experimental Psychology, Heinrich-Heine-University, Düsseldorf, Germany.
Department of Experimental Psychology, Heinrich-Heine-University, Düsseldorf, Germany; Department of Clinical Psychology, University of Konstanz, Konstanz, Germany.
Brain Cogn. 2021 Nov;154:105798. doi: 10.1016/j.bandc.2021.105798. Epub 2021 Sep 13.
The study investigates how transcranial direct current stimulation (tDCS) over the auditory cortex (AC) modulates memory for melodies under different noise conditions, whilst also considering cumulative disruptive interference effects. Forty-one participants completed a continuous recognition melody task, as well as a visual control task, which included four noise conditions for which noise was either present only during encoding (N-C), only during retrieval (C-N), during both (N-N) or not at all (C-C) and completed the tasks after receiving anodal or sham tDCS over the right AC. The results of the sham session replicate previous findings by revealing that memory for melodies is worse when noise in added to the encoding phase (N-C) whereas the N-N condition shows good performance, highlighting a context effect, and that cumulative disruptive interference is not present in memory for melodies except in the N-C condition. After anodal stimulation the memory pattern differs such as that memory performance is best in the C-C condition and furthermore the cumulative disruptive interference effect in the N-C condition is diminished. In sum, the study highlights the involvement of the right AC for memory for melodies and the results indicate an association of the AC for creating context effects.
该研究调查了经颅直流电刺激（tDCS）在不同噪声条件下对听觉皮层（AC）如何调节旋律记忆，同时还考虑了累积干扰的破坏效应。41 名参与者完成了连续识别旋律任务和视觉控制任务，其中包括四种噪声条件，噪声仅在编码时存在（N-C），仅在检索时存在（C-N），在两者都存在（N-N）或根本不存在（C-C），并在接受右侧 AC 经颅直流电刺激或假刺激后完成任务。假刺激会话的结果复制了先前的发现，即当在编码阶段添加噪声时（N-C），对旋律的记忆会变差，而 N-N 条件则表现出良好的性能，突出了上下文效应，并且除了 N-C 条件外，在旋律记忆中不存在累积干扰。在阳极刺激后，记忆模式发生变化，例如在 C-C 条件下记忆性能最佳，并且在 N-C 条件下累积干扰破坏效应也减少了。总之，该研究强调了右 AC 对旋律记忆的参与，结果表明 AC 与上下文效应的产生有关。
