Neural correlates of strategic memory retrieval: Differentiating between spatial‐associative and temporal‐associative strategies

Rover, Mischa de; Petersson, Karl Magnus; Werf, S.P. van der; Cools, Alexander R.; Berger, Hans; Fernández, Guillén

doi:10.1002/hbm.20445

Cited by 27 publications

(27 citation statements)

References 79 publications

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“…However, no significant differences were observed in direct comparison of the recall conditions or the age groups. Probably both conditions engage the DLPFC to the same degree (De Rover et al, 2008, Kessels et al, 2007. The lack of an age-related difference in the DLPFC is more difficult to interpret.…”

Section: Discussionmentioning

confidence: 97%

“…On the brain level, the enrichment of the encoding structure resulted in specific differences between young and elderly subjects. While in young it results in the use of imagery (cuneus) during recall (see De Rover et al, 2008), the elderly engage their declarative memory system (hippocampus, thalamus, fusiform gyrus) to accompany the fronto-striatal network. In general, elderly showed enhanced activation of the basal ganglia (right caudate extending to insula), as we had expected.…”

Section: Discussionmentioning

confidence: 99%

“…Following the concept of resource deficit, elderly probably have difficulty using their declarative memory system when demands on self-initiated processing are high, which can be established by offering little contextual information (or socalled environmental support . The task used is the same as used by De Rover et al (2008). They investigated self-initiated processes in an fMRI study using an episodic memory task for sequences of object-location associations in a grid.…”

Section: Introductionmentioning

confidence: 99%

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Age-effects on associative object–location memory

Meulenbroek¹,

Kessels²,

Rover³

et al. 2010

Brain Research

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Aging is accompanied by an impairment of associative memory. The medial temporal lobe and fronto-striatal network, both involved in associative memory, are known to decline functionally and structurally with age, leading to the so-called associative binding deficit and the resource deficit. Because the MTL and fronto-striatal network interact, they might also be able to support each other. We therefore employed an episodic memory task probing memory for sequences of object-location associations, where the demand on self-initiated processing was manipulated during encoding: either all the objects were visible simultaneously (rich environmental support) or every object became visible transiently (poor environmental support). Following the concept of resource deficit, we hypothesised that the elderly probably have difficulty using their declarative memory system when demands on self-initiated processing are high (poor environmental support). Our behavioural study showed that only the young use the rich environmental support in a systematic way, by placing the objects next to each other. With the task adapted for fMRI, we found that elderly showed stronger activity than young subjects during retrieval of environmentally richly encoded information in the basal ganglia, thalamus, left middle temporal/fusiform gyrus and right medial temporal lobe (MTL). These results indicate that rich environmental support leads to recruitment of the declarative memory system in addition to the fronto-striatal network in elderly, while the young use more posterior brain regions likely related to imagery. We propose that elderly try to solve the task by additional recruitment of stimulus-response associations, which might partly compensate their limited attentional resources.

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Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Age-effects on associative object–location memory

Meulenbroek¹,

Kessels²,

Rover³

et al. 2010

Brain Research

Self Cite

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“…Cortisol further modulated interactions between the fusiform gyrus and the amygdala: turning the positive fusiform-amygdala connectivity to negative. The fusiform gyrus has been implicated in spatial-associative-guided memory retrieval (de Rover et al, 2008). Thus, the cortisol-induced suppression of fusiformamygdala connectivity might be related to the well-known inhibiting effects of cortisol on memory retrieval.…”

Section: Discussionmentioning

confidence: 99%

Glucocorticoid Administration Improves Aberrant Fear-Processing Networks in Spider Phobia

Nakataki

Soravia

Schwab

et al. 2016

Neuropsychopharmacol

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Glucocorticoids reduce phobic fear in patients with anxiety disorders. Previous studies have shown that fear-related activation of the amygdala can be mediated through the visual cortical pathway, which includes the fusiform gyrus, or through other pathways. However, it is not clear which of the pathways that activate the amygdala is responsible for the pathophysiology of a specific phobia and how glucocorticoid treatment alleviates fear processing in these neural networks. We recorded the brain activity with functional magnetic resonance imaging in patients with spider phobia, who received either 20 mg of cortisol or a placebo while viewing pictures of spiders. We also tested healthy participants who did not receive any medication during the same task. We performed dynamic causal modelling (DCM), a connectivity analysis, to examine the effects of cortisol on the networks involved in processing fear and to examine if there was an association between these networks and the symptoms of the phobia. Cortisol administration suppressed the phobic stimuli-related amygdala activity to levels comparable to the healthy participants and reduced subjective phobic fear. The DCM analysis revealed that cortisol administration suppressed the aberrant inputs into the amygdala that did not originate from the visual cortical pathway, but rather from a fast subcortical pathway mediated by the pulvinar nucleus, and suppressed the interactions between the amygdala and fusiform gyrus. This network changes were distinguishable from healthy participants and considered the residual changes under cortisol administration. We also found that the strengths of the aberrant inputs into the amygdala were positively correlated with the severity of spider phobia. This study demonstrates that patients with spider phobia show an aberrant functional connectivity of the amygdala when they are exposed to phobia-related stimuli and that cortisol administration can alleviate this fear-specific neural connectivity.

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“…Also, hypothesis 1 supports the idea of associative memory, where, the recall of the banknote sides (front or back) aids and simplifies the task of recognizing the banknote denominations. Similarly, humans more often than not achieve objects recognition or scene understanding through associative memory (Voss 2009;De Rover et al 2008); we often recall or recognize unfamiliar faces by first recalling where we met them. Such interconnected (associative) memory schemes have been shown to be very helpful and important to humans (Chaumon et al 2008).…”

Section: R: R ¼mentioning

confidence: 99%

Banknote recognition: investigating processing and cognition framework using competitive neural network

Oyedotun

Khashman

2016

Cogn Neurodyn

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Humans are apt at recognizing patterns and discovering even abstract features which are sometimes embedded therein. Our ability to use the banknotes in circulation for business transactions lies in the effortlessness with which we can recognize the different banknote denominations after seeing them over a period of time. More significant is that we can usually recognize these banknote denominations irrespective of what parts of the banknotes are exposed to us visually. Furthermore, our recognition ability is largely unaffected even when these banknotes are partially occluded. In a similar analogy, the robustness of intelligent systems to perform the task of banknote recognition should not collapse under some minimum level of partial occlusion. Artificial neural networks are intelligent systems which from inception have taken many important cues related to structure and learning rules from the human nervous/cognition processing system. Likewise, it has been shown that advances in artificial neural network simulations can help us understand the human nervous/cognition system even furthermore. In this paper, we investigate three cognition hypothetical frameworks to vision-based recognition of banknote denominations using competitive neural networks. In order to make the task more challenging and stress-test the investigated hypotheses, we also consider the recognition of occluded banknotes. The implemented hypothetical systems are tasked to perform fast recognition of banknotes with up to 75 % occlusion. The investigated hypothetical systems are trained on Nigeria's Naira banknotes and several experiments are performed to demonstrate the findings presented within this work.

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Neural correlates of strategic memory retrieval: Differentiating between spatial‐associative and temporal‐associative strategies

Cited by 27 publications

References 79 publications

Age-effects on associative object–location memory

Age-effects on associative object–location memory

Glucocorticoid Administration Improves Aberrant Fear-Processing Networks in Spider Phobia

Banknote recognition: investigating processing and cognition framework using competitive neural network

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