Postpartum Oxytocin Treatment via the Mother Reprograms Long-Term Behavioral Disorders Induced by Early Life Stress on the Plasma and Brain Metabolome in the Rat.

The rat model of perinatal stress (PRS), in which exposure of pregnant dams to restraint stress reduces maternal behavior, is characterized by a metabolic profile that is reminiscent of the "metabolic syndrome". We aimed to identify plasma metabolomic signatures linked to long-term programming induced by PRS in aged male rats. This study was conducted in the plasma and frontal cortex. We also investigated the reversal effect of postpartum carbetocin (Cbt) on these signatures, along with its impact on deficits in cognitive, social, and exploratory behavior. We found that PRS induced long-lasting changes in biomarkers of secondary bile acid metabolism in the plasma and glutathione metabolism in the frontal cortex. Cbt treatment demonstrated disease-dependent effects by reversing the metabolite alterations. The metabolomic signatures of PRS were associated with long-term cognitive and emotional alterations alongside endocrinological disturbances. Our findings represent the first evidence of how early life stress may alter the metabolomic profile in aged individuals, thereby increasing vulnerability to CNS disorders. This raises the intriguing prospect that the pharmacological activation of oxytocin receptors soon after delivery through the mother may rectify these alterations.

[Prevalence of mental disorders in French prisons: A systematic review]. / Prévalence des troubles psychiatriques en population carcérale française : une revue systématique de la littérature.

INTRODUCTION: The prevalence of psychiatric disorders among prisoners remains a major public health issue worldwide. In France, despite the increasing number of persons who are incarcerated (+30% between 1992 and 2002 with a 120% prison overcrowding), and a historical concern about the mental health of persons in detention and its management, no systematic review has been published on this subject. The aim of this article is to present the results of a systematic review of the literature on the prevalence of psychiatric disorders in French prisons. METHOD: The reporting of this systematic review conforms to the PRISMA (Preferred Reporting Items for Systematic reviews and Meta-Analyses) checklist. We searched the PubMed and Web of Science databases. We used combinations of keywords relating to prison (prison*, jail*, inmate*), to psychiatry ("mental health", psychiatr*), and to France (France, French). This work was completed with a search through the digital libraries of the École des Hautes Études en Santé Publique (EHESP) and of the Système Universitaire de Documentation (Sudoc) to obtain data from academic works and the gray literature. References cited in studies included in this review were also examined. All references published up to September 2022, written in English or French, presenting the results of original quantitative studies on the prevalence of psychiatric disorders in correctional settings were included. Two researchers independently extracted data from included references according to a pre-established protocol. RESULTS: Among 501 records identified, a total of 35 papers based on 24 epidemiological studies met the eligibility criteria for inclusion in this review: 16 were cross-sectional, 7 retrospective and 1 both cross-sectional and retrospective. All papers were published between 1999 and 2022. We found one European study, 5 international studies, 18 regional or local studies. Of these, 21 studies had all-male or mixed gender samples (but when the sample was mixed gender, it was always at least 92% male). Almost half of the studies (n=11) involved a small sample of fewer than 500 persons. Half of the studies involved a sample of recently incarcerated persons: 6 involved a random sample of persons in detention, and 1 involved a sample of people incarcerated for more than 5 years. The last 5 studies focused on persons aged over 50 years and incarcerated for more than one year (n=1), incarcerated for sexual offences (n=2), placed in disciplinary cells (n=1) or in a special wing for radicalized or suspected radicalized individuals (n=1). Nine studies used standardized and validated diagnostic tools. According to the 4 studies involving representative samples and using standardized and validated diagnostic tools, the prevalence of the following psychiatric disorders was: 29.4-44.4% for anxiety disorders, 5-14.2% for PTSD, 28-31.2% for mood disorders, 6.9-17% for psychotic disorders, 32% for personality disorders and 11% for ADHD. CONCLUSION: This systematic review of the literature highlights the high prevalence of psychiatric disorders in French prisons. The data collected are in line with international studies. The great methodological heterogeneity of the papers included in this review calls for further rigorous research to better understand the rates of mental disorders in French prisons and to explore their determinants.

Clinical features and outcomes of COVID-19 patients hospitalized for psychiatric disorders: a French multi-centered prospective observational study.

BACKGROUND: Patients with psychiatric disorders are exposed to high risk of COVID-19 and increased mortality. In this study, we set out to assess the clinical features and outcomes of patients with current psychiatric disorders exposed to COVID-19. METHODS: This multi-center prospective study was conducted in 22 psychiatric wards dedicated to COVID-19 inpatients between 28 February and 30 May 2020. The main outcomes were the number of patients transferred to somatic care units, the number of deaths, and the number of patients developing a confusional state. The risk factors of confusional state and transfer to somatic care units were assessed by a multivariate logistic model. The risk of death was analyzed by a univariate analysis. RESULTS: In total, 350 patients were included in the study. Overall, 24 (7%) were transferred to medicine units, 7 (2%) died, and 51 (15%) patients presented a confusional state. Severe respiratory symptoms predicted the transfer to a medicine unit [odds ratio (OR) 17.1; confidence interval (CI) 4.9-59.3]. Older age, an organic mental disorder, a confusional state, and severe respiratory symptoms predicted mortality in univariate analysis. Age >55 (OR 4.9; CI 2.1-11.4), an affective disorder (OR 4.1; CI 1.6-10.9), and severe respiratory symptoms (OR 4.6; CI 2.2-9.7) predicted a higher risk, whereas smoking (OR 0.3; CI 0.1-0.9) predicted a lower risk of a confusional state. CONCLUSION: COVID-19 patients with severe psychiatric disorders have multiple somatic comorbidities and have a risk of developing a confusional state. These data underline the need for extreme caution given the risks of COVID-19 in patients hospitalized for psychiatric disorders.

Admission to jail and psychotic symptoms: a study of the psychotic continuum in a sample of recently incarcerated men.

PURPOSE: We sought to measure the prevalence of psychotic symptoms (PSs) and psychotic disorders (PDs) in a sample of men entering jail and to compare these prevalences with those observed in the general population. We also aimed to explore the sociodemographic and clinical factors associated with PSs and PDs. METHODS: The Mental Health in the Prison Population (MHPP) survey interviewed 630 incarcerated men upon admission to jail, using the Mini International Neuropsychiatric Interview. We looked for associations between sociodemographic and clinical characteristics and the presence of lifetime PSs and PDs in the MHPP and Mental Health in the General Population (MHGP) surveys, which used the same methodology to collect data from the jail and general populations of the same geographical area. RESULTS: A higher proportion of PSs without PDs was found in the MHGP group (25.3% vs. 17.8%, p < 0.001), whereas a higher prevalence of PDs was found in the MHPP group (7.0% vs. 2.6%, p < 0.001). The multivariable model indicated that subjects who were single or separated/divorced/widowed and had a history of trauma exposure were at joint risk of PSs and PDs, whereas entering jail was not associated with either PSs or PDs after adjustment for all covariates. CONCLUSION: The present study shows that PDs, but not PSs, are more prevalent in men entering jail than in the general population. This overrepresentation could be further explained by the exposure to vulnerability factors found in this population rather than by any specificity related to entering jail.

Validation of a French questionnaire assessing knowledge of suicide.

OBJECTIVES: The objective of this study was to develop and validate the Knowledge of Suicide Scale (KSS), elaborated to assess adherence to myths about suicide. METHODS: The KSS is a self-questionnaire including 22 statements relating to myths about suicide for which the respondent is asked to rate his degree of adherence on a scale ranging from 0 ("strongly disagree") to 10 ("completely agree"). Using the script concordance test scoring method, the respondents' scores were compared with those of experts to obtain, for each item, a score between 0 (maximum deviation with the experts) and 1 (minimum deviation with the experts). One thousand and thirty-five individuals (222 psychiatric interns, 332 medical interns in the first semester excluding psychiatry and 481 journalism students) were included. RESULTS: According to the exploratory factor analysis, the KSS is a two-dimensional scale: the first subscale includes 15 items and the second seven items. The tool showed excellent face validity, correct convergent and divergent validities (multi-method multi-feature analyzes), and good internal consistency (Cronbach's alpha coefficient between 0.66 and 0.83 for scales and subscales). The KSS is moderately and negatively correlated with the Stigma of Suicide Scale (r=-0.3). It significantly discriminates groups with different expected levels of knowledge regarding suicide (P<0.001). CONCLUSIONS: The KSS demonstrated good psychometric properties to measure adherence to myths about suicide. This tool could be useful in assessing the effectiveness of suicide prevention literacy improvement programs.

Opening the black box of hospitalizations in French high-secure psychiatric forensic units.

INTRODUCTION: Basic epidemiological data are rare concerning the activity of specialized forensic psychiatric facilities in France. Here, we investigated the activity of the ten (640 beds) French "units for difficult patients" (unités pour malades difficiles [UMDs]). METHOD: We used the Programme de médicalisation des systèmes d'information (PMSI) database to describe the characteristics and evolution of psychiatric hospitalisations in UMDs between 2012 and 2021, as well as the age, sex, and principal diagnoses of the patients hospitalized in these facilities. RESULTS: Between 2012 and 2021, 4857 patients were hospitalized in UMDs (6082 stays). Among them, 897 (18.5%) had more than one stay. The number of admissions ranged from a minimum of 434 to a maximum of 632 per year. The number of discharges ranged from a minimum of 473 to a maximum of 609 per year. The mean length of stay was 13.5 (SD: 22.64) months with a median of 7.3 months (IQR: 4.0-14.4). Among the 6082 stays, 5721 (94.1%) involved male patients. The median age was 33 (IQR: 26-41) years. The most frequent principal psychiatric diagnoses were psychotic disorders and personality disorders. CONCLUSION: The number of individuals hospitalized in specialized forensic psychiatric facilities has been stable for 10 years in France and remains lower than in most European countries.

[The transitional mobile team, psychiatric care upon release from prison]. / L'équipe mobile transitionnelle, des soins psychiatriques en sortie de prison.

The "transitional mobile team" has been developed to optimize the management of the transition from prison to the community for people with psychiatric disorders in France. The objectives are to limit the risk of relapse and death during this high-risk period and to ensure the links between psychiatry in prison and community psychiatry.

Coffee consumption and seizure frequency in patients with drug-resistant focal epilepsy.

OBJECTIVE: To assess the relation between coffee consumption and seizure frequency in patients with drug-resistant focal epilepsy. METHODS: Cross-sectional analysis of data collected in the SAVE study, which included patients with drug-resistant focal epilepsy during long-term EEG monitoring. Patients in whom both coffee consumption and data about seizure frequency, including focal to bilateral tonic-clonic seizures (FBTCS), were available were selected. Coffee consumption was collected using a standardized self-report questionnaire and classified into four groups: none, rare (from less than 1 cup/week to up 3 cups/week), moderate (from 4 cups/week to 3 cups/day), and high (more than 4 cups/day). RESULTS: Six hundred and nineteen patients were included. There was no relation between coffee consumption and total seizure frequency (p = 0.902). In contrast, the number of FBTCS reported over the past year was significantly associated with usual coffee consumption (p = 0.029). Specifically, number of FBCTS in patients who reported moderate coffee consumption was lower than in others. In comparison with patients with moderate coffee consumption, the odds ratio (95%CI) for reporting at least 1 FBTCS per year was 1.6 (1.03-2.49) in patients who never take coffee, 1.62 (1.02-2.57) in those with rare consumption and 2.05 (1.24-3.4) in those with high consumption. Multiple ordinal logistic regression showed a trend toward an association between coffee consumption and number of FBTCS (p = 0.08). CONCLUSIONS AND RELEVANCE: Our data suggest that effect of coffee consumption on seizures might depend on dose with potential benefits on FBTCS frequency at moderate doses. These results will have to be confirmed by prospective studies.

Gender-related associations between psychiatric disorders and alcohol use disorder: Findings from the french "Mental health in the general population" survey.

Women with alcohol use disorder (AUD) might be particularly vulnerable to psychiatric comorbidities. However, population surveys have yielded disparate findings. We used data from the French Mental Health in the General Population survey to investigate gender-related risks of psychiatric comorbidities associated with AUD. A cross-sectional survey based on face-to-face interviews, including the Mini International Neuropsychiatric Interview, was conducted among 38,717 subjects. Logistic regression models were used to assess risks of psychiatric comorbidities associated with AUD. After adjustment for socio-demographics and other psychiatric disorders, both women and men with AUD were at higher risk of comorbid depressive disorder (odds ratio [OR] = 2.6, 95% confidence interval [CI]: 2.0-3.4 in women, and OR = 2.0, 95% CI: 1.7-2.4 in men), bipolar I disorder (2.5; 1.4-4.4 in women vs. 2.6; 1.9-3.4 in men), and psychotic disorder (1.6; 1.01-2.5 in women vs. 1.8; 1.4-2.3 in men). Women with AUD exhibited an increased risk of comorbid panic disorder (OR = 1.6, 95% CI: 1.1-2.2) while the increased risk of post-traumatic stress disorder (PTSD) was significant in men only (OR = 2.6, 95% CI: 1.6-4.2). The increased risk of comorbid substance use disorder (SUD) was more elevated in women, compared to men (12.9; 8.1-18.1 vs. 4.8; 4.0-5.8 in men). Most of psychiatric conditions were over-represented in both women and men with AUD, relative to controls. Gender-specific findings were that women with AUD had an increased risk of comorbid SUD or panic disorder, while men had a significantly higher risk of comorbid PTSD.

Substance Use, Substance Use Disorders, and Co-Occurring Psychiatric Disorders in Recently Incarcerated Men: A Comparison with the General Population.

INTRODUCTION: The rates of alcohol and illegal drug use and the prevalence of alcohol and illegal drug use disorders (AUDs and DUDs) are high in prison populations, particularly in men entering jail. However, these rates have never been exhaustively assessed and compared to those of the general population in France. METHODS: We based our research on two surveys, conducted in the same French region, which included a total of 630 men entering jail and 5,793 men recruited from the general population. We used the Mini-International Neuropsychiatric Interview to assess alcohol and drug use, AUD, DUD, as well as co-occurring psychiatric disorders, and we examined differences in prevalence rates between the two populations. Logistic regression models were performed to (i) identify the factors associated with AUD and DUD and (ii) test whether the interaction between admission to jail and the presence of AUD, DUD, or both is linked to the presence of at least one co-occurring psychiatric disorder. RESULTS: Compared to the general population sample, the prevalence of AUD (33.8% vs. 8.7%, p < 0.001) and DUD (at least one type of drug: 28.7% vs. 5.0%, p < 0.001; cannabis: 24.0% vs. 4.7%, p < 0.001; opioids: 6.8% vs. 0.4%, p < 0.001; stimulants: 5.2% vs. 0.8%, p < 0.001) was significantly higher in the jail population sample, as well as the rates of past-year use of various substances (alcohol: 62.1% vs. 56.4%, p = 0.007; at least one type of illegal drug: 50.0% vs. 14.4%, p < 0.001; cannabis: 45.6% vs. 13.9%, opioids: 9.4% vs. 0.7%; stimulants: 8.6% vs. 1.9%). Admission to jail was associated with a higher risk of AUD (aOR = 3.80, 95% CI: 2.89-5.01, p < 0.001) or DUD (aOR = 4.25, 95% CI: 3.10-5.84, p < 0.001). History of trauma was also associated with both AUD (aOR = 1.81, 95% CI: 1.53-2.14, p < 0.001) and DUD (aOR = 2.15, 95% CI: 1.74-2.65, p < 0.001), whereas history of migration was only associated with DUD (aOR = 1.38, 95% CI: 1.12-1.71, p = 0.003). AUDs and DUDs were more strongly associated with co-occurring psychiatric disorders in incarcerated men than in the general population. Among individuals with AUD, DUD, or both, co-occurring anxiety and mood disorders were particularly more frequent in jail than in the general population. DISCUSSION/CONCLUSION: As in most countries, AUD and DUD are highly prevalent among men entering jail in France. Our results also suggest that incarceration constitutes an independent vulnerability factor for a dual disorder, which supports a systematic assessment and treatment of psychiatric disorders in men entering jail and diagnosed with an AUD or DUD.

Religiosity and prevalence of suicide, psychiatric disorders and psychotic symptoms in the French general population.

We aimed to examine the association between religious beliefs and observance and the prevalence of psychiatric disorders, psychotic symptoms and history of suicide attempts in the French general population. The cross-sectional survey interviewed 38,694 subjects between 1999 and 2003, using the MINI. Current religious beliefs and observance were identified by means of two questions: "are you a believer?" and "are you religiously observant?". We studied the association between religiosity and psychiatric outcomes using a multivariable logistic regression model adjusted for sociodemographic characteristics, including migrant status. Religious beliefs were positively associated with psychotic symptoms and disorders [OR = 1.37, 95% CI (1.30-1.45) and OR = 1.38, 95% CI (1.20-1.58)], unipolar depressive disorder [OR = 1.15, 95% CI (1.06-1.23)] and generalized anxiety disorder [OR = 1.13, 95% CI (1.06-1.21)], but negatively associated with bipolar disorder [OR = 0.83, 95% CI (0.69-0.98)], alcohol use disorders [OR = 0.69, 95% CI (0.62-0.77)], substance use disorders [OR = 0.60, 95% CI (0.52-0.69)] and suicide attempts [OR = 0.90, 95% CI (0.82-0.99)]. Religious observance was positively associated with psychotic symptoms and disorders [OR = 1.38, 95% CI (1.20-1.58) and OR = 1.25, 95% CI (1.07-1.45)], but negatively associated with social anxiety disorder [OR = 0.87, 95% CI (0.76-0.99)], alcohol use disorders [OR = 0.60, 95% CI (0.51-0.70)], substance use disorders [OR = 0.48, 95% CI (0.38-0.60)] and suicide attempts [OR = 0.80, 95% CI (0.70-0.90)]. Among believers, religious observance was not associated with psychotic outcomes. Religiosity appears to be a complex and bidirectional determinant of psychiatric symptoms and disorders. In this respect, religiosity should be more thoroughly assessed in epidemiological psychiatric studies, as well as in clinical practice.

Brain imaging in catatonia: systematic review and directions for future research.

BACKGROUND: Catatonia is a frequent, complex and severe identifiable syndrome of motor dysregulation. However, its pathophysiology is poorly understood. METHODS: We aimed to provide a systematic review of all brain imaging studies (both structural and functional) in catatonia. RESULTS: We identified 137 case reports and 18 group studies representing 186 individual patients with catatonia. Catatonia is often associated with brain imaging abnormalities (in more than 75% of cases). The majority of the case reports show diffuse lesions of white matter, in a wide range of brain regions. Most of the case reports of functional imaging usually show frontal, temporal, or basal ganglia hypoperfusion. These abnormalities appear to be alleviated after successful treatment of clinical symptoms. Structural brain magnetic resonance imaging studies are very scarce in the catatonia literature, mostly showing diffuse cerebral atrophy. Group studies assessing functional brain imaging after catatonic episodes show that emotional dysregulation is related to the GABAergic system, with hypoactivation of orbitofrontal cortex, hyperactivation of median prefrontal cortex, and dysconnectivity between frontal and motor areas. CONCLUSION: In catatonia, brain imaging is abnormal in the majority of cases, and abnormalities more frequently diffuse than localised. Brain imaging studies published so far suffer from serious limitations and for now the different models presented in the literature do not explain most of the cases. There is an important need for further studies including a better clinical characterisation of patients with catatonia, functional imaging with concurrent catatonic symptoms and the use of novel brain imaging techniques.

Alcohol Use Disorder Is Differently Associated With Psychotic Symptoms According To Underlying Psychiatric Disorders: A General Population Study.

AIMS: Psychotic symptoms can occur in the general population, and alcohol use disorder (AUD) is an identified vulnerability factor. However, it remains unclear how AUD is associated with psychotic symptoms, depending on the underlying psychiatric condition.We aimed to compare the prevalence of psychotic symptoms among subjects with different types of psychiatric disorders, i.e. unipolar or bipolar disorders, anxiety disorders, psychotic disorders or no psychiatric disorder, depending on whether or not there was an underlying AUD. METHODS: In a 38,694-subject general population study, we compared the likelihood of occurrence of seven types of psychotic symptoms, depending on the AUD status and the underlying psychiatric disorders, after adjustment for age, sex, marital status, education and income levels. RESULTS: In unipolar depression and anxiety disorders, almost all types of psychotic symptoms were found associated with AUD (odds ratios (ORs) between 1.98 and 2.19). In contrast, in bipolar disorder, only auditory hallucinations were associated with AUD (OR = 2.50). In psychotic disorders, only thought broadcasting was more frequent among subjects with AUD (OR = 1.78). CONCLUSION: Our findings in depression and anxiety disorders are in line with the 'dual diagnosis' concept, which posits that comorbid psychiatric/addictive disorders form distinctive entities that are more frequently associated with non-specific severity factors, here psychotic symptoms. The co-occurrence of AUD in bipolar/psychotic disorders was not associated with a generalized increased occurrence of psychotic symptoms but altered their manifestations with an increased risk of auditory hallucinations for bipolar disorder and thought broadcasting for psychotic disorders.

A Latent Class Analysis of Manic and Psychotic Symptoms.

Bipolar spectrum disorders encompass heterogeneous clinical manifestations and comorbidities. A latent class analysis (LCA) was performed in 1846 subjects who experienced an episode of abnormally elevated or irritable mood to identify homogeneous groups of subjects, based on the distribution of 11 manic and 7 psychotic symptoms. LCA identified five classes: 1) two classes with irritability and with low and high level of psychosis (respectively "irritable," 29.1% of the sample, and "irritable-psychotic," 16.2%); 2) a class with expansive mood and hyperactivity ("expansive-hyperactive," 12.7%); and 3) two classes with manic symptoms and high and low level of psychosis ("manic-psychotic," 15.0%, and "manic," 27.2%). "Irritable" displayed lower rates of depressive episode, panic, and substance use disorders. Manic-psychotic displayed higher rates of depressive episode, panic, generalized anxiety, and substance use disorders. Use of mental health treatment more frequent in manic-psychotic and manic classes. Five classes of bipolar spectrum disorders were characterized by different sociodemographic and clinical patterns.

De novo convulsive status epilepticus in patients with multiple sclerosis treated with dalfampridine.

BACKGROUND: Dalfampridine extended release (DAL) is a broad-spectrum voltage-gated potassium channel blocker that is indicated in multiple sclerosis to improve the nerve conduction of demyelinated axons. Seizures are a known side effect of DAL, which is contraindicated in patients with a history of epilepsy. OBJECTIVE: Three cases of multiple sclerosis (MS) with de novo convulsive status epilepticus (CSE) probably related to dalfampridine administration are described. METHODS: No patients had a history of seizures or renal impairment. Biological tests were normal. A brain magnetic resonance imaging (MRI) showed diffuse cortical and subcortical atrophy without active inflammatory lesions. RESULTS: All three patients presented with CSE that was attributed to DAL and so was discontinued. CONCLUSION: These case reports illustrate that, aside from seizures, de novo CSE is a potential complication of MS patients treated with DAL.

Impregnated acetate gauze compared with lipido-colloid contact layer at dressing removal pain: a single-blind cross-over randomised control trial.

OBJECTIVE: To evaluate the performance of Jelonet Plus (JP) and UrgoTul (UT), assessing pain at dressing removal when managing acute or chronic wounds at granulation and epithelialisation stages. METHODS: This was a randomised, multicentre, controlled single-blinded study using a cross-over design. Hospitalised and ambulatory patients presenting with non-infected acute or chronic wounds (at least 40% of wound area of ≤100cm2 covered with granulation tissue) were randomly allocated to be treated with either JP or UT dressings applied according to a standardised local care procedure for two days. At the following visit, patients received the other dressing for a second 2-day period. Pain was evaluated after two days of dressing application and immediately after its removal using a 100mm Visual Analog Scale (VAS). A pain level >30mm was considered as clinically relevant. A lower limit of -12% was determined as the threshold necessary to demonstrate the non-inferiority of JP compared to UT. RESULTS: For the 99 patients completing the study, a difference of 7.9% was observed in favour of JP (83.8% JP versus 75.9% UT) for pain immediately after dressing removal (VAS score < 30mm) with a confidence interval (CI) lower limit of -2.6%, demonstrating non-inferiority (pre-defined limit of -12%). Concerning pain at dressing removal, a difference of 19.6% was observed in favour of JP (81.6% versus 62.0%; p=0.029 for superiority analysis), with a CI lower limit ranging from 2.4% to 38.9%. Therefore, superiority could be concluded. A statistically significant period effect was detected (p=0.003) with fewer patients experiencing pain after the second period day 2 (D2) to day 4 (D4) than the first day 0 (D0) to D2. A statistically significant cross-over effect was also detected (p=0.047), with fewer patients experiencing pain when JP was applied first followed by UT. This suggests a carry-over effect thus preventing a full cross-over design analysis. Adherence of the dressing was less frequent with the JP than the UT dressing (2.0% JP versus 6.9% with UT). CONCLUSION: Non-inferiority of pain at dressing removal was demonstrated with JP. Superiority on this criteria was non-significant but we found adherence of the dressing to the wound bed to be more rare.

Prediction of activation patterns preceding hallucinations in patients with schizophrenia using machine learning with structured sparsity.

Despite significant progress in the field, the detection of fMRI signal changes during hallucinatory events remains difficult and time-consuming. This article first proposes a machine-learning algorithm to automatically identify resting-state fMRI periods that precede hallucinations versus periods that do not. When applied to whole-brain fMRI data, state-of-the-art classification methods, such as support vector machines (SVM), yield dense solutions that are difficult to interpret. We proposed to extend the existing sparse classification methods by taking the spatial structure of brain images into account with structured sparsity using the total variation penalty. Based on this approach, we obtained reliable classifying performances associated with interpretable predictive patterns, composed of two clearly identifiable clusters in speech-related brain regions. The variation in transition-to-hallucination functional patterns not only from one patient to another but also from one occurrence to the next (e.g., also depending on the sensory modalities involved) appeared to be the major difficulty when developing effective classifiers. Consequently, second, this article aimed to characterize the variability within the prehallucination patterns using an extension of principal component analysis with spatial constraints. The principal components (PCs) and the associated basis patterns shed light on the intrinsic structures of the variability present in the dataset. Such results are promising in the scope of innovative fMRI-guided therapy for drug-resistant hallucinations, such as fMRI-based neurofeedback.

Very early hallucinatory experiences: a school-based study.

BACKGROUND: The prevalence and clinical significance of hallucinatory experiences among children below 7 years of age remain unknown. We aimed to determine the independent influences of sensory deficits, the presence of an imaginary companion and metacognition on hallucinatory experiences. We assumed that hallucinatory experiences were associated with (a) sensory deficits, (b) the presence of an imaginary companion (IC) and (c) metacognition defaults (i.e. first- and second-order theory of mind default). METHODS: All children in the third year of preschool from a region of Northern France underwent medical screening. We compared the prevalence rates of visual, auditory and audio-visual hallucinatory experiences based on (a) the presence of visual or auditory deficits, (b) the actual presence of an IC and (c) metacognition. The analyses were adjusted for age. RESULTS: A total of 1,087 children aged between 5 and 7 years were included. The prevalence rates of auditory, visual and audio-visual hallucinatory experiences were 15.8%, 12.5% and 5.8%, respectively. The prevalences of different types of hallucinatory experiences were not significantly different according to sensory deficit. The prevalences of all types of hallucinatory experiences were significantly higher among children with an IC and among children with metacognition defaults. CONCLUSIONS: The association between hallucinatory experiences and sensory deficits might concern only long-lasting deficits. The association with the presence of an IC confirms experimental findings of the likelihood of perceiving words among meaningless auditory stimuli. Relations between hallucinatory experiences and theory of mind need to be addressed in longitudinal studies.