Aim of the research was to investigate whether a temporal structure could be detected in the behavioural response to an aversive stimulation. A fear-related memory task was used in rats, placed in a modified version of the Novel Object Recognition task known as Emotional Object Recognition task, i.e. a behavioural assay that orbits around the declarative memory for an aversive experience. To this purpose, twelve male Wistar rats, divided in two groups (Control and Aversive memory), observed after 4 h (OR4h) and after 24 h (OR24h) from the delivery of an aversive stimulation, associated to a specific object, were used. Data were evaluated both in terms of conventional quantitative approaches and by means of T-pattern analysis, namely a multivariate technique able to unveil the temporal structure of behaviour and the relationships amongst the behavioural items in time. Results evidenced several changes between groups and over time as well. Mean occurrences and mean durations showed significant differences between OR4h and OR24h sessions and between Control and Aversive memory groups for behavioural items of Exploration, Object-related aversion and Immobility. T-pattern analysis revealed important changes of behavioural variability, complexity and repetitiveness, (i.e., the three main qualitative features of T-patterns) in the Aversive memory group. These outcomes highlight a simpler and linear behavioural profile, focused only on specific sequences of particularly repetitive events. Overall, the present study demonstrates a) the presence of a temporal organization of fear-related behavioural events and b) the influence of learning on the modifications observed over time.

该研究的目的是调查是否可以在对厌恶刺激的行为反应中检测到时间结构。恐惧相关的记忆任务被用于大鼠，放置在被称为情绪对象识别任务的新型对象识别任务的修改版本中，即围绕陈述性记忆轨道运行以获得厌恶体验的行为分析。为此，使用了 12 只雄性 Wistar 大鼠，分为两组（对照和厌恶记忆），在传递与特定对象相关的厌恶刺激后 4 小时 (OR4h) 和 24 小时 (OR24h) 后观察。 . 根据传统的定量方法和 T 型分析对数据进行评估，即一种能够及时揭示行为的时间结构和行为项目之间关系的多元技术。结果证明了组之间以及随着时间的推移发生了一些变化。平均出现次数和平均持续时间显示 OR4h 和 OR24h 会话之间以及控制和厌恶记忆组之间对于探索、对象相关厌恶和不动的行为项目的显着差异。T型分析揭示了厌恶记忆组的行为可变性、复杂性和重复性（即T型的三个主要定性特征）的重要变化。这些结果突出了更简单和线性的行为特征，仅关注特别重复事件的特定序列。全面的，