A review of neurobiological factors underlying the selective enhancement of memory at encoding, consolidation, and retrieval

Crowley, Rebecca S.; Bendor, Daniel; Javadi, Amir‐Homayoun

doi:10.1016/j.pneurobio.2019.04.004

Cited by 29 publications

(25 citation statements)

References 141 publications

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“…Consolidation of episodic, sequential and spatial memories is largely supported by hippocampal networks. Neural replay of encoded information occurs during post-learning rest and sleep and is commonly concurrent with hippocampal ripples (HC-ripples) within sharp-wave/ripple complexes (SWR) [1]. Memory is impaired when SWR are suppressed during sleep [2] and wakefulness [3], but memory reactivation has different functions in sleep and wake.…”

Section: Introductionmentioning

confidence: 99%

The role of slow-wave sleep rhythms in the cortical-hippocampal loop for memory consolidation

Navarrete

Valderrama

Lewis

2020

Current Opinion in Behavioral Sciences

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Memory consolidation during slow-wave sleep is supported by slow oscillations (SOs), spindles, and hippocampal ripples. Recent evidence in both rodents and humans has demonstrated that consolidation is mediated by a bidirectional hippocampal-cortical loop. Here, we discuss oscillatory mechanisms by which the interaction of these non-REM oscillations may provide an appropriate neural framework for both the TOP-DOWN and the BOTTOM-UP processes in this loop. We also discuss how non-REM oscillations promote cortical plasticity for new memories, while simultaneously downregulating the representations of information in hippocampal networks. Finally, we point out that not all individual instances of non-REM oscillations play a role in the consolidation process. Instead, the capacity of these rhythms to support memory is determined by a triple SOspindle-ripple coupling provided by thalamocortical dynamics. Importantly, large, spatially synchronised SOs promote thalamic downstates, and spindles, boosting the probability of this triple coupling.

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Section: Introductionmentioning

confidence: 99%

The role of slow-wave sleep rhythms in the cortical-hippocampal loop for memory consolidation

Navarrete

Valderrama

Lewis

2020

Current Opinion in Behavioral Sciences

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“…New information is encoded by the sensory system into the working memory and stored in the long-term memory in schemas that are built from the new information as well as information that was already stored in existing schemas (e.g., van Merriënboer and Sweller, 2010). The process of encoding, storing, and retrieving is enhanced by emotional arousal (Crowley et al, 2019). Arousal will help to construct stronger and larger schemas during initial learning, which makes it easier to retrieve the learned information from longterm memory (van Kesteren et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

The Effect of Passive and Active Education Methods Applied in Repetition Activities on the Retention of Anatomical Knowledge

Kooloos

Bergman

Scheffers

et al. 2019

Anatomical Sciences Ed

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This study examines the long-term retention of anatomical knowledge from 180 students after various repetition activities. The retention of anatomical knowledge was assessed by multiple-choice tests at five different points in time: before and after a course in Functional Anatomy, before and after repetition activities that occurred 14 weeks after this course, and 28 weeks after this course to establish long-term retention. Students were divided into five groups: one without any repetition activity, one with a restricted repetition activity (the multiple-choice test), and three groups that were offered repetition activities (traditional lecture, e-learning module, and small group work in the dissection room). During all three repetition activities the same information was conveyed, and this content was not revisited in other courses for the duration of the study. The results showed that students who did not engage in a repetition activity scored significantly lower on the long-term retention test compared to all other groups (ANCOVA: P = 0.0001). Pair-wise comparison with estimated means showed that the other four groups, regardless of the type of repeating activity, did not differ in the amount of knowledge they retained during any of the five assessments (P = 0.008, P = 0.0001, P = 0.001, and P = 0.0001, respectively). This study suggests that the type of repetition activity has no effect on knowledge retention both immediately following the activity and in the long term. It is concluded that the repetition of anatomical knowledge in any form is beneficial for students and will likely improve student outcomes in a curriculum that builds on prior knowledge. Anat Sci Educ 13: 458-466.

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“…This suggests that oscillatory reinstatement is dependent on a process called systems consolidation. Complementary learning systems models (Eichenbaum, 2000;McClelland, McNaughton & O'Reilly, 1995;O'Reilly et al, 2014) posit that long-term memory is supported by two specialised systems; the hippocampus which focuses on the rapid acquisition of novel information, and the more distributed neocortex, which focuses on gradually integrating incoming information within structured and contextualised cortical representations (Crowley, Bendor & Javadi, 2019).…”

Section: Discussionmentioning

confidence: 99%

Intrinsic reinstatement of induced oscillatory context

Chantrel

Trabattoni

Orton

et al. 2021

Preprint

Self Cite

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Declarative memory retrieval is thought to rely on the reinstatement, at retrieval, of contextual cues present during encoding, as evidenced in the context and state-dependent literature. Specifically, previous work has shown that reinstating the oscillatory activity present during encoding, at retrieval, is particularly supportive of memory recall. Our study builds on previous findings suggesting that the oscillatory activity present at encoding may be automatically reinstated during retrieval. To explore the roles of consolidation, prefrontal involvement, and frequency specific activity in this process of oscillatory reinstatement, 115 healthy young adults were randomly assigned to one of five conditions. In each condition, transcranial alternating current stimulation (tACS) was administered at either one of two frequencies (60Hz or 6Hz), over the left dorsolateral prefrontal cortex (left-DLPFC, Experimental) or the right primary motor cortex (right-PMC, Control), during learning of written words. This was followed by a retention interval of either 90 minutes or 1 week and a testing phase, during which EEG activity was recorded. Our results showed significant (and frequency specific) oscillatory reinstatement, after stimulation of the left-DLPFC, in the 1-week retention condition. Oscillatory reinstatement effects were non-significant after stimulation of the right-PMC, or in the 90 minutes retention interval condition. Our results highlight that the oscillatory activity induced during encoding is consolidated as context alongside the information and is reinstated intrinsically during retrieval. The implications of our findings for models of human memory, future avenues of research and clinical applications are discussed.

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A review of neurobiological factors underlying the selective enhancement of memory at encoding, consolidation, and retrieval

Cited by 29 publications

References 141 publications

The role of slow-wave sleep rhythms in the cortical-hippocampal loop for memory consolidation

The role of slow-wave sleep rhythms in the cortical-hippocampal loop for memory consolidation

The Effect of Passive and Active Education Methods Applied in Repetition Activities on the Retention of Anatomical Knowledge

Intrinsic reinstatement of induced oscillatory context

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