Subjective experience of episodic memory and metacognition: a neurodevelopmental approach.

Episodic retrieval is characterized by the subjective experience of remembering. This experience enables the co-ordination of memory retrieval processes and can be acted on metacognitively. In successful retrieval, the feeling of remembering may be accompanied by recall of important contextual information. On the other hand, when people fail (or struggle) to retrieve information, other feelings, thoughts, and information may come to mind. In this review, we examine the subjective and metacognitive basis of episodic memory function from a neurodevelopmental perspective, looking at recollection paradigms (such as source memory, and the report of recollective experience) and metacognitive paradigms such as the feeling of knowing). We start by considering healthy development, and provide a brief review of the development of episodic memory, with a particular focus on the ability of children to report first-person experiences of remembering. We then consider neurodevelopmental disorders (NDDs) such as amnesia acquired in infancy, autism, Williams syndrome, Down syndrome, or 22q11.2 deletion syndrome. This review shows that different episodic processes develop at different rates, and that across a broad set of different NDDs there are various types of episodic memory impairment, each with possibly a different character. This literature is in agreement with the idea that episodic memory is a multifaceted process

Memory in autism spectrum disorder: a meta-analysis of experimental studies

To address inconsistencies in the literature on memory in Autism Spectrum Disorder (ASD), we report the first ever meta-analysis of short-term (STM) and episodic long-term (LTM) memory in ASD, evaluating the effects of type of material, type of retrieval and the role of inter-item relations. Analysis of 64 studies comparing individuals with ASD and typical development (TD) showed greater difficulties in ASD compared to TD individuals in STM (Hedges’ g=-0.53 [95%CI -0.90; -0.16], p=.005, I²=96%) compared to LTM (g=-0.30 [95%CI -0.42; -0.17], p<.00001, I²=24%), a small difficulty in verbal LTM (g=-0.21, p=.01), contrasting with a medium difficulty for visual LTM (g= -0.41, p=.0002) in ASD compared to TD individuals. We also found a general diminution in free recall compared to cued recall and recognition (LTM, free recall: g=-0.38, p<.00001, cued recall: g=-0.08, p=.58, recognition: g=-0.15, p=.16; STM, free recall: g=-0.59, p=.004, recognition: g=-0.33, p=.07). We discuss these results in terms of their relation to semantic memory. The limited diminution in verbal LTM and preserved overall recognition and cued recall (supported retrieval) may result from a greater overlap of these tasks with semantic long-term representations which are overall preserved in ASD. By contrast, difficulties in STM or free recall may result from less overlap with the semantic system or may involve additional cognitive operations and executive demands. These findings highlight the need to support STM functioning in ASD and acknowledge the potential benefit of using verbal materials at encoding and broader forms of memory support at retrieval to enhance performance

Evaluation De La Mise En Œuvre Des Outils De Planification De La Commune De Kpomasse Au Sud Du Benin Cas Du PDES Et Du SDAC

RésuméLa planification du territoire nécessite l’élaboration d’un certain nombre de documents de stratégie qui ont été précisé par le législateur en République du Bénin. A l’instar des communes du Bénin, les communes du département de l’Atlantique ont chacune élaboré les outils de planification telle qu’elles le peuvent. L’une des plus grandes insuffisances réside dans le manque de suivi-évaluation de ces documents de planification spatiale. La présente recherche vise à évaluer la mise en œuvre des outils de planification spatiale que la commune de Kpomassè s’est dotée en l’occurrence le PDES 2ème génération et le SDAC. L’approche méthodologique adoptée s’articule autour de la collecte des données, leur traitement et l’analyse des résultats. Au total, 114 personnes ont été investigués dont 6 chefs d’arrondissements et 3 chefs services techniques. Les critères d’évaluation des documents de planification spatiale ont été définis ce qui a permis d’analyser le suivi-évaluation et les effets de la mise en œuvre des différents programmes et projets inscrits dans les outils de planification spatiale de la commune de Kpomassè.Les résultats ont montré que le non mis en œuvre du Schéma Directeur d’Aménagement Communal dans la commune ne permet pas une gouvernance efficace du cadre de vie. L’analyse globale des activités prévues au PDES 2 montre que les activités qui ont été réalisées ont atteints respectivement un taux d’exécution physique et financière de 55,43 % et 41,18 %. Ainsi, le calcul de l’indice d’efficacité du PDES 2 est de 0,52 ce qui témoigne que la mise en œuvre a été globalement inefficace. Par contre, l’indice d’efficience calculé est de 0,62 ce qui dénote que la mise en œuvre du PDES 2 de la commune de Kpomassè est moyennement efficient. Les difficultés que rencontrent les autorités communales sont d’ordre financier, technique et humain. Il urge donc, que les autorités communales trouvent des solutions pour pouvoir mettre en œuvre les documents de planification spatiale afin de favoriser un développement harmonieux et durable du territoire communal.Mots-clés : Commune de Kpomassè, évaluation, documents de planification spatiale, élus locaux.AbstractTerritorial planning requires the development of a number of strategy documents that have been specified by the legislator in the Republic of Benin. Like the municipalities in Benin, the municipalities in the Atlantic Department have each developed planning tools as best they can. One of the greatest shortcomings is the lack of monitoring and evaluation of these spatial planning documents. This research aims to evaluate the implementation of spatial planning tools that the municipality of Kpomassè has adopted, namely the PDES 2nd generation and the SDAC. The methodological approach adopted revolves around data collection, processing and analysis of the results. A total of 114 people were interviewed, including, 6 heads of districts and 3 heads of technical services. The evaluation criteria for spatial planning documents were defined, which made it possible to analyze the monitoring-evaluation and effects of the implementation of the various programs and projects included in the spatial planning tools of the municipality of Kpomassè.The results showed that the non-implementation of the Schéma Directeur d'Aménagement Communal in the municipality does not allow for effective governance of the living environment. The overall analysis of the activities planned in PDES 2 shows that the activities that have been carried out have achieved a physical and financial execution rate of 55.43% and 41.18% respectively. Thus, the efficiency index for PDES 2 is calculated at 0.52, which indicates that implementation was inefficient overall. On the other hand, the efficiency index calculated is 0.62, which indicates that the implementation of PDES 2 in the municipality of Kpomassè is moderately efficient. The difficulties encountered by the communal authorities are financial, technical and human. It is therefore urgent that the communal authorities find solutions to be able to implement the spatial planning documents in order to promote harmonious and sustainable development of the communal territory.Keywords: Kpomassè Municipality, evaluation, spatial planning documents, local elected officials

Exploring the Event-Related Potentials' Time Course of Associative Recognition in Autism

Behavioral data on episodic recollection in autism spectrum disorders (ASD) point limited relational memory functioning. However, the involvement of successive memory processes in the profile of episodic memory in ASD needs more study. Here, we used event-related potentials (ERP) to investigate the time course of episodic recollection with an associative recognition paradigm with picture pairs. Twenty-two participants with ASD and 32 with typical development (TD), all right-handed, were included. Behavioral results confirmed difficulties in correctly recognizing identical pairs in the ASD relative to TD group. We found an unexpected amplitude decrement on the P2 (220-270 msec) and FN400 (350-470 msec) potentials, suggesting diminished priming and familiarity effects in the ASD relative to TD group. However, ERP data revealed that the recognition of associative information relies on the same electrophysiological process (old/new effect in the 600-700-msec late positive component) in ASD participants as in TD ones, with a parietal extension in the ASD group. These results suggest that the electrophysiological processes of associative recognition are qualitatively similar in individuals with and without ASD but may differ quantitatively. This difference may be driven by the reduced early processing of picture pairs that may in turn lead to their diminished integration into the semantic memory system, being partially compensated by a greater involvement of associative memory during the recollection process. Other studies would be useful to go further in identifying these cognitive processes involved in atypical recognition in ASD and their neural substrates. LAY SUMMARY: We identified diminished performance on the associative recognition of picture pairs in adolescents and young adults with autism when compared to typical development. Electrophysiological data revealed qualitative similarities but quantitative differences between-group, with diminished priming and familiarity processes partially compensated by an enhanced parietal recollection process

Quantifying changes in umbilicus size to estimate the relative age of neonatal blacktip reef sharks (Carcharhinus melanopterus)

Sharks can incur a range of external injuries throughout their lives that originate from various sources, but some of the most notable wounds in viviparous shark neonates are at the umbilicus. Umbilical wounds typically heal within 1 to 2 months post-parturition, depending on the species, and are therefore often used as an indicator of neonatal life stage or as a relative measure of age [e.g. grouping by umbilical wound classes (UWCs), according to the size of their umbilicus]. To improve comparisons of early-life characteristics between studies, species and across populations, studies using UWCs should integrate quantitative changes. To overcome this issue, we set out to quantify changes in umbilicus size of neonatal blacktip reef sharks (Carcharhinus melanopterus) around the island of Moorea, French Polynesia, based on temporal regression relationships of umbilicus size. Here, we provide a detailed description for the construction of similar quantitative umbilical wound classifications, and we subsequently validate the accuracy of our classification and discuss two examples to illustrate its efficacy, depletion rate of maternally provided energy reserves and estimation of parturition period. A significant decrease in body condition in neonatal sharks as early as twelve days post-parturition suggests a rapid depletion of in utero-allocated energy reserves stored in the liver. Back calculations of timing of birth based on the umbilicus size of neonates determine a parturition season from September to January, with most parturitions occurring during October and November. As such, this study contributes valuable data to inform the conservation and management of young-of-the-year blacktip reef sharks, and we therefore encourage the construction and use of similar regression relationships for other viviparous shark species

Impaired decision-making and brain shrinkage in alcoholism

Alcohol-dependent individuals usually favor instant gratification of alcohol use and ignore its long-term negative consequences, reflecting impaired decision-making. According to the somatic marker hypothesis, decision-making abilities are subtended by an extended brain network. As chronic alcohol consumption is known to be associated with brain shrinkage in this network, the present study investigated relationships between brain shrinkage and decision-making impairments in alcohol-dependent individuals early in abstinence using voxel-based morphometry. Thirty patients performed the Iowa Gambling Task and underwent a magnetic resonance imaging investigation (1.5T). Decision-making performances and brain data were compared with those of age-matched healthy controls. In the alcoholic group, a multiple regression analysis was conducted with two predictors (gray matter [GM] volume and decision-making measure) and two covariates (number of withdrawals and duration of alcoholism). Compared with controls, alcoholics had impaired decision-making and widespread reduced gray matter volume, especially in regions involved in decision-making. The regression analysis revealed links between high GM volume in the ventromedial prefrontal cortex, dorsal anterior cingulate cortex and right hippocampal formation, and high decision-making scores (P&lt;0.001, uncorrected). Decision-making deficits in alcoholism may result from impairment of both emotional and cognitive networks

Maternal HIV Illness and its Impact on Children’s Well-being and Development in Haiti

Little is known about the impact of parental HIV illness on children’s well-being and development in the island nations of the Caribbean. Study objectives were to examine mothers’ experiences of impact of HIV illness on their children’s well-being and development in Haiti. Baseline interviews were conducted between 2006 and 2007 with 25 HIV-positive mothers as part of a larger study that examined the feasibility of a psychosocial support group intervention for HIV-affected youth and their caregivers in central Haiti. Interviews were transcribed verbatim and coded for topical themes by two investigators. Main themes related to impact of maternal HIV illness on children’s well-being were the lack of mothers’ physical strength to take care of their children, and their difficulties in providing housing and food for their children. Children’s school enrollment, attendance, and performance were also affected by their mother’s illness. Mothers reported that although their children were HIV-negative, children were distressed by HIV-related stigma that they and their mothers experienced. Findings suggest that children living in HIV-affected families in this region face disadvantages in nutritional, educational, and psychological outcomes. These considerations should be taken into account when designing interventions to support children living in HIV-affected families in this setting

Disclosure and Impact of Maternal HIV+ Serostatus on Mothers and Children in Rural Haiti

Mothers living with HIV (MLWHs) in the United States have reported that one of their main challenges is the decision to disclose their HIV serostatus to their children and the potential consequences of their disclosure. Little is known about the experiences of MLWHs regarding disclosing their HIV serostatus to their children and the impact of maternal HIV disclosure in the island nations of the Caribbean. Study objectives were to identify the factors influencing maternal HIV disclosure, examine the breadth of maternal HIV disclosure, and understand the impact of disclosure on mothers and the children

FREE ORAL COMMUNICATIONS 2: ALCOHOL AND LIVER—CLINICAL RESEARCHO2.1RAPID DECLINE OF LIVER STIFFNESS WITH ALCOHOL WITHDRAWAL IN HEAVY DRINKERS

Background and aims. Measurement of liver stiffness using real-time elastography appears as a promising tool to evaluate the severity of chronic liver diseases. Previous studies in patients with alcoholic liver disease have suggested that fibrosis was the only histological parameter to influence liver stiffness. To challenge this hypothesis, we have prospectively tested the short-term impact of alcohol withdrawal on liver stiffness value. Methods. All patients hospitalized for alcohol withdrawal in our Liver Unit between September 2008 and December 2010 had a liver stiffness determination (using a FibroScan® device) at entry (D0) and 7 days after alcohol withdrawal (D7). Stiffness values were compared using non-parametric test for paired-values. We compared (i) the 10 measures performed at D0 and at D7 for each patient; (ii) the variation of the median result of all patients (using Wilcoxon test in both cases). Results. A total of 138 patients were included in the study [median alcohol consumption: 150g/day (range: 40-400); hepatitis C: n=22 (15.9%); cirrhosis: n=29 (21.0%)]. From D0 to D7, the liver stiffness decreased significantly in 61 patients (44.2%) and increased significantly in 18 (13.0%). Considering all patients, median liver stiffness value decreased from 7.25 to kPa (P<0.001). The stage of fibrosis indicated by liver stiffness changed in 47 patients between D0 and D7 (decrease in 33 and increase in 14). Conclusion. Liver stiffness decreases significantly in nearly half of alcoholic patients after only 7 days of abstinence. This result strongly suggests that non-fibrotic lesions (such as inflammatory ones) may influence liver stiffness. From a practical point of view, it also shows that variation in alcohol consumption must be taken into account for the interpretation of liver stiffness valu

Local Processing Bias Impacts Implicit and Explicit Memory in Autism

Autism spectrum disorder (ASD) is characterized by atypical perception, including processing that is biased toward local details rather than global configurations. This bias may impact on memory. The present study examined the effect of this perception on both implicit (Experiment 1) and explicit (Experiment 2) memory in conditions that promote either local or global processing. The first experiment consisted of an object identification priming task using two distinct encoding conditions: one favoring local processing (Local condition) and the other favoring global processing (Global condition) of drawings. The second experiment focused on episodic (explicit) memory with two different cartoon recognition tasks that favored either local (i.e., processing specific details) or a global processing (i.e., processing each cartoon as a whole). In addition, all the participants underwent a general clinical cognitive assessment aimed at documenting their cognitive profile and enabling correlational analyses with experimental memory tasks. Seventeen participants with ASD and 17 typically developing (TD) controls aged from 10 to 16 years participated to the first experiment and 13 ASD matched with 13 TD participants were included for the second experiment. Experiment 1 confirmed the preservation of priming effects in ASD but, unlike the Comparison group, the ASD group did not increase his performance as controls after a globally oriented processing. Experiment 2 revealed that local processing led to difficulties in discriminating lures from targets in a recognition task when both lures and targets shared common details. The correlation analysis revealed that these difficulties were associated with processing speed and inhibition. These preliminary results suggest that natural perceptual processes oriented toward local information in ASD may impact upon their implicit memory by preventing globally oriented processing in time-limited conditions and induce confusion between explicit memories that share common details