scholarly journals Superior explicit memory despite severe developmental amnesia: In‐depth case study and neural correlates

Hippocampus ◽  
2018 ◽  
Vol 28 (12) ◽  
pp. 867-885 ◽  
Author(s):  
Pierre‐Yves Jonin ◽  
Gabriel Besson ◽  
Renaud La Joie ◽  
Jérémie Pariente ◽  
Serge Belliard ◽  
...  
Keyword(s):  
Explicit Memory ◽  
Neural Correlates ◽  
Developmental Amnesia

Dissociation of the neural correlates of implicit and explicit memory

Nature ◽  
10.1038/33396 ◽  
1998 ◽  
Vol 392 (6676) ◽  
pp. 595-598 ◽  
Author(s):  
Michael D. Rugg ◽  
Ruth E. Mark ◽  
Peter Walla ◽  
Astrid M. Schloerscheidt ◽  
Claire S. Birch ◽  
...  
Keyword(s):  
Explicit Memory ◽  
Neural Correlates ◽  
Implicit And Explicit Memory ◽  
Implicit And Explicit

scholarly journals Conceptual Priming and Familiarity: Different Expressions of Memory during Recognition Testing with Distinct Neurophysiological Correlates

2010 ◽  
Vol 22 (11) ◽  
pp. 2638-2651 ◽  
Author(s):  
Joel L. Voss ◽  
Heather D. Lucas ◽  
Ken A. Paller
Keyword(s):  
Implicit Memory ◽  
Explicit Memory ◽  
Neural Correlates ◽  
Neural Responses ◽  
Neural Signals ◽  
Conceptual Information ◽  
Conceptual Priming ◽  
Familiarity And Recollection ◽  
Recognition Testing ◽  
Different Characteristics

Familiarity and recollection are qualitatively different explicit-memory phenomena evident during recognition testing. Investigations of the neurocognitive substrates of familiarity and recollection, however, have typically disregarded implicit-memory processes likely to be engaged during recognition tests. We reasoned that differential neural responses to old and new items in a recognition test may reflect either explicit or implicit memory. Putative neural correlates of familiarity in prior experiments, for example, may actually reflect contamination by implicit memory. In two experiments, we used obscure words that subjects could not formally define to tease apart electrophysiological correlates of familiarity and one form of implicit memory, conceptual priming. In Experiment 1, conceptual priming was observed for words only if they elicited meaningful associations. In Experiment 2, two distinct neural signals were observed in conjunction with familiarity-based recognition: late posterior potentials for words that both did and did not elicit meaningful associations and FN400 potentials only for the former. Given that symbolic meaning is a prerequisite for conceptual priming, the combined results specifically link late posterior potentials and FN400 potentials with familiarity and conceptual priming, respectively. These findings contradict previous interpretations of FN400 potentials as generic signals of familiarity and show that repeated stimuli in recognition tests can engender facilitated processing of conceptual information in addition to retrieval processing that leads to the awareness of memory retrieval. The different characteristics of the electrical markers of these two types of process further underscore the biological validity of the distinction between implicit memory and explicit memory.

scholarly journals Neural Correlates of Dream Lucidity Obtained from Contrasting Lucid versus Non-Lucid REM Sleep: A Combined EEG/fMRI Case Study

SLEEP ◽  
2012 ◽  
Vol 35 (7) ◽  
pp. 1017-1020 ◽  
Author(s):  
Martin Dresler ◽  
Renate Wehrle ◽  
Victor I. Spoormaker ◽  
Stefan P. Koch ◽  
Florian Holsboer ◽  
...  
Keyword(s):  
Rem Sleep ◽  
Neural Correlates

scholarly journals Neuropsychological correlates of an energy psychology intervention on flight phobia: A MEG single-case study

2019 ◽  
Author(s):  
Franck Di Rienzo ◽  
Elodie Saruco ◽  
Dawson Church ◽  
Sébastien Daligault ◽  
Claude Delpuech ◽  
...  
Keyword(s):  
Treatment Effects ◽  
Single Case ◽  
Neural Correlates ◽  
Brain Regions ◽  
Evidence Based Treatment ◽  
Energy Psychology ◽  
Randomized Controlled ◽  
Neurophysiological Mechanisms ◽  
First Time

In this single-case MEG pilot study, an Emotional Freedom Technique (EFT) intervention produced regulation of brain regions exhibiting treatment effects in response to conventional psychotherapy and medication. The neural correlates of the threat response were attenuated, and heightened activation of brain frontal executive regions mediating limbic responses appraisal to stressful stimuli was recorded. These pilot results are consistent with the literature indicating that EFT is an evidence-based treatment for phobias. They provide for the first time knowledge regarding the neurophysiological mechanisms underlying the treatment effects. This study pioneers the methodology required to conduct randomized controlled trials.

Voluntary Explicit versus Involuntary Conceptual Memory Are Associated with Dissociable fMRI Responses in Hippocampus, Amygdala, and Parietal Cortex for Emotional and Neutral Word Pairs

2011 ◽  
Vol 23 (8) ◽  
pp. 1935-1951 ◽  
Author(s):  
Cristina Ramponi ◽  
Philip J. Barnard ◽  
Ferath Kherif ◽  
Richard N. Henson
Keyword(s):  
Parietal Cortex ◽  
Explicit Memory ◽  
Neutral Word ◽  
Functional Neuroimaging ◽  
Neural Correlates ◽  
Study Phase ◽  
Behavioral Performance ◽  
Conceptual Memory ◽  
Successful Retrieval ◽  
The Difference

Although functional neuroimaging studies have supported the distinction between explicit and implicit forms of memory, few have matched explicit and implicit tests closely, and most of these tested perceptual rather than conceptual implicit memory. We compared event-related fMRI responses during an intentional test, in which a group of participants used a cue word to recall its associate from a prior study phase, with those in an incidental test, in which a different group of participants used the same cue to produce the first associate that came to mind. Both semantic relative to phonemic processing at study, and emotional relative to neutral word pairs, increased target completions in the intentional test, but not in the incidental test, suggesting that behavioral performance in the incidental test was not contaminated by voluntary explicit retrieval. We isolated the neural correlates of successful retrieval by contrasting fMRI responses to studied versus unstudied cues for which the equivalent “target” associate was produced. By comparing the difference in this repetition-related contrast across the intentional and incidental tests, we could identify the correlates of voluntary explicit retrieval. This contrast revealed increased bilateral hippocampal responses in the intentional test, but decreased hippocampal responses in the incidental test. A similar pattern in the bilateral amygdale was further modulated by the emotionality of the word pairs, although surprisingly only in the incidental test. Parietal regions, however, showed increased repetition-related responses in both tests. These results suggest that the neural correlates of successful voluntary explicit memory differ in directionality, even if not in location, from the neural correlates of successful involuntary implicit (or explicit) memory, even when the incidental test taps conceptual processes.

The Neural Correlates of Vertical Splitting in a Single Case Study

2012 ◽  
Vol 14 (2) ◽  
pp. 157-163 ◽  
Author(s):  
Paula C. Wolk ◽  
Robert L. Savoy ◽  
Blaise B. Frederick
Keyword(s):  
Single Case ◽  
Neural Correlates ◽  
Single Case Study
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