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Reminder-dependent alterations in long-term declarative memory expression
Neurobiol Learn Mem. 2023 Nov 7:107858. doi: 10.1016/j.nlm.2023.107858. Online ahead of print.ABSTRACTThe reminder of a previously-learned memory can render that memory vulnerable to disruption or change in expression. Such memory alterations have been viewed as supportive of the framework of memory reconsolidation. However, alternative interpretations and inconsistencies in the replication of fundamental findings have raised questions particularly in the domain of human declarative memory. Here we present a series of related experiments, all of which involve the learning of a declarative memory, followed 1-2 days later by...
Source: Neurobiology of Learning and Memory - November 9, 2023 Category: Neurology Authors: Kai Rong Tay Francesca Bolt Hei Ting Wong Svetlina Vasileva Jonathan Lee Source Type: research

Electrophysiological evidence for context reinstatement effects on object recognition memory
Neurobiol Learn Mem. 2023 Nov 7:107861. doi: 10.1016/j.nlm.2023.107861. Online ahead of print.ABSTRACTReinstating the context present at encoding during the test phase generally enhances recognition memory compared with changing the context when specific item-context associations are established during encoding. However, it remains unclear whether context reinstatement improves the performance in differentiating between old and similar items in recognition memory tests and what underlying cognitive processes are involved. Using the context reinstatement paradigm together with event-related potentials (ERP), we examined the...
Source: Neurobiology of Learning and Memory - November 9, 2023 Category: Neurology Authors: Jingwen Miao Michael Weigl Nuo Kong Min-Fang Zhao Axel Mecklinger Zhiwei Zheng Juan Li Source Type: research

The anterior medial hippocampus contributes to both recall and familiarity-based memory for scenes
Neurobiol Learn Mem. 2023 Nov 7:107859. doi: 10.1016/j.nlm.2023.107859. Online ahead of print.ABSTRACTThe hippocampus is usually associated with recall memory, whereas its contribution to familiarity-based memory is debated. Growing evidence support the idea that this structure participates to any cognitive process performed on scene representations. In parallel, differences in functional specialisation and cortical connectivity were found across the longitudinal and transverse axes of the hippocampus. Here we reanalysed functional MRI data from 51 participants showing stronger engagement of the hippocampus in recall, fami...
Source: Neurobiology of Learning and Memory - November 9, 2023 Category: Neurology Authors: J Gardette E Cousin P Hot Source Type: research

Differential effects of acute stress on spatial learning and memory in the open-field tower maze across the female estrous cycle
Neurobiol Learn Mem. 2023 Nov 7:107862. doi: 10.1016/j.nlm.2023.107862. Online ahead of print.ABSTRACTThe purpose of the present investigation was to test how acute stress and levels of circulating estrogens together influence acquisition and retention of spatial learning, as well as explorative behaviors in female rats. We used the hippocampus-dependent Open-field Tower Maze (OFTM) task to assess acquisition followed by a retention test (reacquisition) that was given 48 hours later. Immediately prior to acquisition, experimental rats were exposed to an acute restraint stress and were trained under bright lights. Female ra...
Source: Neurobiology of Learning and Memory - November 9, 2023 Category: Neurology Authors: Olga Lipatova Matthew M Campolattaro Blakely K Lockhart Mariam B Hammad Source Type: research

Cortisol decreases activation in extinction related brain areas resulting in an impaired recall of context-dependent extinction memory
Neurobiol Learn Mem. 2023 Nov;205:107844. doi: 10.1016/j.nlm.2023.107844. Epub 2023 Oct 20.ABSTRACTConditioned responding gradually stops during successful extinction learning. The renewal effect is defined as the recovery of a extinguished conditioned response when the context of extinction is different from acquisition. The stress hormone cortisol is known to have an influence on extinction memory and associative learning. Different effects of cortisol on behaviour and brain activity have been observed with respect to stress timing, duration, and intensity. However, the influence of cortisol prior to the initial encoding...
Source: Neurobiology of Learning and Memory - October 22, 2023 Category: Neurology Authors: Alina Nostadt Christian J Merz Oliver T Wolf Martin Tegenthoff Silke Lissek Source Type: research

Cortisol decreases activation in extinction related brain areas resulting in an impaired recall of context-dependent extinction memory
Neurobiol Learn Mem. 2023 Oct 20;205:107844. doi: 10.1016/j.nlm.2023.107844. Online ahead of print.ABSTRACTConditioned responding gradually stops during successful extinction learning. The renewal effect is defined as the recovery of a extinguished conditioned response when the context of extinction is different from acquisition. The stress hormone cortisol is known to have an influence on extinction memory and associative learning. Different effects of cortisol on behaviour and brain activity have been observed with respect to stress timing, duration, and intensity. However, the influence of cortisol prior to the initial ...
Source: Neurobiology of Learning and Memory - October 22, 2023 Category: Neurology Authors: Alina Nostadt Christian J Merz Oliver T Wolf Martin Tegenthoff Silke Lissek Source Type: research