The Neural Basis of Temporal Order Processing in Past and Future Thought

D’Argembeau, Arnaud; Jeunehomme, Olivier; Majerus, Steve; Bastin, Christine; Salmon, Eric

doi:10.1162/jocn_a_00680

Cited by 24 publications

(13 citation statements)

References 85 publications

(120 reference statements)

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“…Children exposed to early adversity may be more dependent on the latter circuit (198). New research also links mPFC to the production of multimodal imagery (199–203) and spatiotemporal orientation (204, 205). …”

Section: The Stress Acceleration Hypothesis Of Nightmaresmentioning

confidence: 99%

The Stress Acceleration Hypothesis of Nightmares

Nielsen

2017

Front. Neurol.

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Adverse childhood experiences can deleteriously affect future physical and mental health, increasing risk for many illnesses, including psychiatric problems, sleep disorders, and, according to the present hypothesis, idiopathic nightmares. Much like post-traumatic nightmares, which are triggered by trauma and lead to recurrent emotional dreaming about the trauma, idiopathic nightmares are hypothesized to originate in early adverse experiences that lead in later life to the expression of early memories and emotions in dream content. Accordingly, the objectives of this paper are to (1) review existing literature on sleep, dreaming and nightmares in relation to early adverse experiences, drawing upon both empirical studies of dreaming and nightmares and books and chapters by recognized nightmare experts and (2) propose a new approach to explaining nightmares that is based upon the Stress Acceleration Hypothesis of mental illness. The latter stipulates that susceptibility to mental illness is increased by adversity occurring during a developmentally sensitive window for emotional maturation—the infantile amnesia period—that ends around age 3½. Early adversity accelerates the neural and behavioral maturation of emotional systems governing the expression, learning, and extinction of fear memories and may afford short-term adaptive value. But it also engenders long-term dysfunctional consequences including an increased risk for nightmares. Two mechanisms are proposed: (1) disruption of infantile amnesia allows normally forgotten early childhood memories to influence later emotions, cognitions and behavior, including the common expression of threats in nightmares; (2) alterations of normal emotion regulation processes of both waking and sleep lead to increased fear sensitivity and less effective fear extinction. These changes influence an affect network previously hypothesized to regulate fear extinction during REM sleep, disruption of which leads to nightmares. This network consists of a fear circuit that includes amygdala, hippocampus, and medial prefrontal cortex and whose substantial overlap with the stress acceleration findings allows the latter to be incorporated into a wider, more developmentally coherent framework.

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Section: The Stress Acceleration Hypothesis Of Nightmaresmentioning

confidence: 99%

The Stress Acceleration Hypothesis of Nightmares

Nielsen

2017

Front. Neurol.

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“…These different resolutions of relational details determine the location of hippocampal activity along the long axis , . A common interpretation of this model is that the anterior hippocampus is recruited for coarse‐based information, such as recovering general emotional information or object‐based conceptual information, whereas the posterior hippocampus is critical for retrieving fine‐grained perceptual or geometrically based relations, such as the location of a landmark in space or particular temporal sequences . Alternate but not orthogonal views are that the anterior and posterior aspects process familiar versus contextual details of events …”

Section: Section Three: Hippocampal Functional Organizationmentioning

confidence: 99%

“…34,[105][106][107] A common interpretation of this model is that the anterior hippocampus is recruited for coarse-based information, such as recovering general emotional information or object-based conceptual information, whereas the posterior hippocampus is critical for retrieving fine-grained perceptual or geometrically based relations, such as the location of a landmark in space or particular temporal sequences. [108][109][110] Alternate but not orthogonal views are that the anterior and posterior aspects process familiar versus contextual details of events. [111][112][113] Within our framework, these findings and formulations can be used to predict how hippocampal segments will support mental construction on the basis of the noted retrieval characteristics of construction.…”

Section: Section Three: Hippocampal Functional Organizationmentioning

confidence: 99%

“…103,110,129 Beyond spatial construction, the posterior hippocampus is involved in a host of other tasks that require relating together specific experienced details. Indeed, there is now evidence that the posterior hippocampus supports fine-grained representations, even when these occur in temporal "space" 108,109,130,131 (for recent views on this topic, see Ref. 132).…”

Section: Anterior and Posterior Hippocampal Contributions To Mental Cmentioning

confidence: 99%

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The role of the hippocampus in memory and mental construction

Sheldon

Levine

2016

Ann. N.Y. Acad. Sci.

129

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Much has been learned about the processes that support the remembrance of past autobiographical episodes and their importance for a number of cognitive tasks. This work has focused on hippocampal contributions to constructing coherent mental representations of scenarios for these tasks, which has opened up new questions about the underlying hippocampal mechanisms. We propose a new framework to answer these questions, which incorporates task demands that prompt hippocampal contributions to mental construction, the online formation of such mental representations, and how these demands relate to the functional organization of the hippocampus. Synthesizing findings from autobiographical memory research, our framework suggests that the interaction of two task characteristics influences the recruitment of the hippocampus: (1) the degree of task open-endedness (quantified by the presence/absence of a retrieval framework) and (2) the degree to which the integration of perceptual details is required. These characteristics inform the relative weighting of anterior and posterior hippocampal involvement, following an organizational model in which the anterior and posterior hippocampus support constructions on the basis of conceptual and perceptual representations, respectively. The anticipated outcome of our framework is a refined understanding of hippocampal contributions to memory and to the host of related cognitive functions.

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“…There are several fMRI experiments that focused on the spatiotemporal analysis of the representation of informational items in short-time memory (Attout et al, 2014 ; D'Argembeau et al, 2014 , and references therein). In addition, some experiments show the disruption of functional cortical networks in the case of psychiatric disorders including schizophrenia (Baker et al, 2014 ; Bittner et al, 2014 ).…”

Section: Discussionmentioning

confidence: 99%

Robust sequential working memory recall in heterogeneous cognitive networks

Rabinovich

Sokolov

Kozma

2014

Front. Syst. Neurosci.

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Psychiatric disorders are often caused by partial heterogeneous disinhibition in cognitive networks, controlling sequential and spatial working memory (SWM). Such dynamic connectivity changes suggest that the normal relationship between the neuronal components within the network deteriorates. As a result, competitive network dynamics is qualitatively altered. This dynamics defines the robust recall of the sequential information from memory and, thus, the SWM capacity. To understand pathological and non-pathological bifurcations of the sequential memory dynamics, here we investigate the model of recurrent inhibitory-excitatory networks with heterogeneous inhibition. We consider the ensemble of units with all-to-all inhibitory connections, in which the connection strengths are monotonically distributed at some interval. Based on computer experiments and studying the Lyapunov exponents, we observed and analyzed the new phenomenon—clustered sequential dynamics. The results are interpreted in the context of the winnerless competition principle. Accordingly, clustered sequential dynamics is represented in the phase space of the model by two weakly interacting quasi-attractors. One of them is similar to the sequential heteroclinic chain—the regular image of SWM, while the other is a quasi-chaotic attractor. Coexistence of these quasi-attractors means that the recall of the normal information sequence is intermittently interrupted by episodes with chaotic dynamics. We indicate potential dynamic ways for augmenting damaged working memory and other cognitive functions.

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The Neural Basis of Temporal Order Processing in Past and Future Thought

Cited by 24 publications

References 85 publications

The Stress Acceleration Hypothesis of Nightmares

The Stress Acceleration Hypothesis of Nightmares

The role of the hippocampus in memory and mental construction

Robust sequential working memory recall in heterogeneous cognitive networks

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