Frisoni Matteo, Croce Pierpaolo, Tosoni Annalisa, Zappasodi Filippo, Sestieri Carlo
Department of Neuroscience, Imaging and Clinical Sciences, Via dei Vestini 11, 66100 Chieti, Italy.
ITAB Institute for Advanced Biomedical Technologies, G. d'Annunzio University of Chieti-Pescara, Via dei Vestini 11, 66100 Chieti, Italy.
iScience. 2025 Mar 1;28(4):112132. doi: 10.1016/j.isci.2025.112132. eCollection 2025 Apr 18.
The ability to date events is fundamental to episodic memory. Separate lines of fMRI research have explored the neurobiological mechanisms underlying temporal precision and the representation of temporal structure in complex events. The present EEG study examined the oscillatory dynamics of both processes in participants performing a timeline positioning task with movie scenes. Multivariate analyses identified a high-beta/low-gamma electrophysiological signature of temporal precision during timeline presentation, involving a right-lateralized network. An independent representation similarity analysis revealed a strong coupling between behavioral and neural distance between pairs of movie parts in the same time-frequency band as the precision effect. Crucially, participants with higher temporal precision showed a stronger correlation between behavioral and neural distance, reinforcing the link between brain signals related to precision and temporal structure representation. These findings support the idea of a systematic temporal organization of experiences, which plays a role in guiding inferential processes.
对事件进行时间定位的能力是情景记忆的基础。功能磁共振成像（fMRI）研究的不同方向探索了复杂事件中时间精度和时间结构表征背后的神经生物学机制。本脑电图（EEG）研究考察了参与者在对电影场景进行时间线定位任务时这两个过程的振荡动力学。多变量分析确定了时间线呈现过程中时间精度的高β/低γ电生理特征，涉及一个右侧化网络。独立的表征相似性分析显示，在与精度效应相同的时频带中，电影片段对之间的行为距离和神经距离之间存在强耦合。至关重要的是，时间精度较高的参与者在行为距离和神经距离之间表现出更强的相关性，强化了与精度相关的脑信号和时间结构表征之间的联系。这些发现支持了经验具有系统时间组织的观点，这种组织在指导推理过程中发挥作用。
