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Nathalie COULON

    Nathalie COULON

    BackgroundWhile adult outcome in autism spectrum disorder (ASD) is generally measured using socially valued roles, it could also be understood in terms of aspects related to health status – an approach that could inform on potential... more
    BackgroundWhile adult outcome in autism spectrum disorder (ASD) is generally measured using socially valued roles, it could also be understood in terms of aspects related to health status – an approach that could inform on potential gender differences.MethodsWe investigated gender differences in two aspects of outcome related to health-status, i.e. general functioning and self-perceived health status, and co-occurring health conditions in a large multi-center sample of autistic adults. Three hundred and eighty-three participants were consecutively recruited from the FondaMental Advanced Centers of Expertise for ASD cohort (a French network of seven expert centers) between 2013 and 2020. Evaluation included a medical interview, standardized scales for autism diagnosis, clinical and functional outcomes, self-perceived health status and verbal ability. Psychosocial function was measured using the Global Assessment of Functioning scale.ResultsWhile autistic women in this study were more...
    Among severe psychiatric disorders, schizophrenia has one of the highest impacts on professional and personal functioning with important indirect costs including disability pension allowance for the patients with the more severe forms of... more
    Among severe psychiatric disorders, schizophrenia has one of the highest impacts on professional and personal functioning with important indirect costs including disability pension allowance for the patients with the more severe forms of schizophrenia. To explore early-life factors associated with disability pension in schizophrenia. 916 patients were consecutively recruited at a national level in 10 expert centers and received a comprehensive standardized evaluation. Their disability pension status and early-life variables were reported from medical records and validated scales. Eight factors were explored: age, male sex, parental history of severe mental illness, childhood trauma exposure, education level, childhood ADHD, early age at schizophrenia onset and duration of untreated psychosis. 739 (80.7%) participants received a disability pension. In the multivariate model, early age at schizophrenia onset and low education level were associated with disability pension independently of age and sex while no significant association was found for parent history of severe mental illness, childhood trauma, childhood ADHD or duration of untreated psychosis. Low education level and early age at schizophrenia onset seem the best predictors of increased risk of disability pension in schizophrenia.
    Clinical observations suggest early self-consciousness disturbances in schizophrenia. A double mirror combining the images of two individuals sitting on each side of the mirror was used to study self–other differentiation in 12... more
    Clinical observations suggest early self-consciousness disturbances in schizophrenia. A double mirror combining the images of two individuals sitting on each side of the mirror was used to study self–other differentiation in 12 individuals with early onset schizophrenia (EOS) and 15 individuals with adult onset schizophrenia (AOS) compared to 27 typically developing controls (TDC) matched on age and sex. The effects of intermodal sensory perception (visual–tactile and visual–kinesthetic) on self–other recognition were also studied. The results showed that EOS and AOS individuals, independently of age and schizophrenia severity, were centered on their own image compared to TDC, with both significant earlier self-recognition and delayed other-recognition during the visual recognition task. In addition, there was no significant effect of intermodal sensory stimulation on self–other recognition in EOS and AOS patients, whereas self-centered functioning was significantly increased by vis...
    The links between anorexia nervosa (AN) and anxiety disorders, and particularly social phobia, are little known. However, social phobia occurs frequently in AN. Some studies have shown reduction in anxious and depressive symptomatology in... more
    The links between anorexia nervosa (AN) and anxiety disorders, and particularly social phobia, are little known. However, social phobia occurs frequently in AN. Some studies have shown reduction in anxious and depressive symptomatology in AN with re-nutrition. But, to our knowledge, no work has examined the evolution of social phobia symptoms during re-nutrition in AN. To specify the links between AN, nutritional state, and social phobia. The population consisted of 2 samples and the analysis was conducted using the SPSS11.5. Sample 1 (N=24 AN) was evaluated on admission and on leaving the hospital. Our evaluation used the body mass index (BMI), the Liebowitz scale, the Mini International Neuropsychiatric Interview (MINI), and the Yale-Brown Obsessive Compulsive Scale for Eating Disorders scale (Y-BOCS-ED) respectively to evaluate or diagnose the state of malnutrition, social anxiety symptomatology, social phobia in Diagnostic and Statistical Manual-4 (DSM-IV) and anorexic symptomatology. Sample 2 (N=60) was assessed at the end of the hospitalization and then 6, 12 and 18 months later. We used the BMI, Liebowitz scale, MINI, and Eating Disorders Inventory (EDI) to assess anorexic symptomatology. In addition, the Morgan-Russell outcome assessment schedule (MR schedule) was used to assess the total clinical state of the patients. Social anxiety symptomatology and actual diagnosis decreased throughout the treatment. However, regardless of the point at which the patient received care, there was no correlation between social phobia and nutritional state, as indicated by BMI. A correlation existed between social phobia and AN symptomatology, and between social phobia and total clinical state, during the out-patient care. A component of AN-social phobia comorbidity is still questionable. Is it linked to the clinical state of the subjects (question of an additional effect of under nutrition and cognition), or even to AN? Others indicators of under nutrition are of interest and warrant further evaluations. We therefore feel that a diagnosis of social phobia can only be confirmed after an acute state of AN, thus allowing for preferential treatments. Others studies must be conducted in order to continue to explore the links between social phobia and AN.
    Little is known about perception of physical pain in schizophrenia (SZ). Some studies have suggested that patients with SZ may have an increased pain threshold, while others have suggested that patients with SZ may suffer from undetected... more
    Little is known about perception of physical pain in schizophrenia (SZ). Some studies have suggested that patients with SZ may have an increased pain threshold, while others have suggested that patients with SZ may suffer from undetected and untreated high physical pain levels. The objectives of this study were (i) to investigate the prevalence of self-reported physical pain in stabilized SZ subjects, and (ii) to determine whether physical pain was associated with psychiatric characteristics and somatic comorbidities (iii) to determine whether antidepressants and benzodiazepine administration were associated with lower self-reported pain. 468 community-dwelling stable SZ subjects (73% men, mean aged 32 years) were recruited in the Schizophrenia Expert Center national network. Patients with moderate to extreme pain, assessed with the EQ5D-5L questionnaire, were classified as belonging to the "pain group". 104 (22.2%) reported moderate to extreme pain levels. In multivariate...
    Major depressive disorder (MDD) is underdiagnosed and undertreated in schizophrenia, and has been strongly associated with impaired quality of life.AimsTo determine the prevalence and associated factors of MDD and unremitted MDD in... more
    Major depressive disorder (MDD) is underdiagnosed and undertreated in schizophrenia, and has been strongly associated with impaired quality of life.AimsTo determine the prevalence and associated factors of MDD and unremitted MDD in schizophrenia, to compare treated and non-treated MDD. Participants were included in the FondaMental Expert Centers for Schizophrenia and received a thorough clinical assessment. MDD was defined by a Calgary score ≥6. Non-remitted MDD was defined by current antidepressant treatment (unchanged for >8 weeks) and current Calgary score ≥6. 613 patients were included and 175 (28.5%) were identified with current MDD. MDD has been significantly associated with respectively paranoid delusion (odds ratio 1.8; P = 0.01), avolition (odds ratio 1.8; P = 0.02), blunted affect (odds ratio 1.7; P = 0.04) and benzodiazepine consumption (odds ratio 1.8; P = 0.02). Antidepressants were associated with lower depressive symptoms score (5.4 v. 9.5; P < 0.0001); however,...
    BackgroundThe terrorist attack at Westminster Bridge on March 22nd, 2017 impacted on French high school students on a school trip in London. This terrorist attack was claimed by the Islamic State. The aim of the study was to assess the... more
    BackgroundThe terrorist attack at Westminster Bridge on March 22nd, 2017 impacted on French high school students on a school trip in London. This terrorist attack was claimed by the Islamic State. The aim of the study was to assess the mental health consequences of the attack on the French adolescents who were directly exposed (criteria A for Post-Traumatic Stress Disorder, PTSD). This involved three dimensions, namely: (1) clinical; (2) epidemiological; and (3) prevention and therapeutic.Material and MethodThe investigation was the first observational step of AVAL (Adolescents Victimes de l'Attentat de Londres) study, a cohort monitoring project and it was then a monocentric, cross sectional, non interventional survey, at only one-year post-trauma. The study was carried out utilizing self- and clinician-administered questionnaires. Volunteers from the medico-psychological emergency unit provided support for these victims during the study protocol.ResultsFrom the target populati...
    Contexte : Autisme, trouble du spectre autistique, schizophrenies precoces voire meme tres precoces (SDTP)... autant de termes utilises de nos jours! Meme si les classifications restent aujourd'hui categorielles, les travaux sont... more
    Contexte : Autisme, trouble du spectre autistique, schizophrenies precoces voire meme tres precoces (SDTP)... autant de termes utilises de nos jours! Meme si les classifications restent aujourd'hui categorielles, les travaux sont cependant croissants pour approfondir et comprendre un eventuel lien entre les troubles du spectre autistique et schizophrenique, et notamment un lien entre les troubles du spectre autistique (TSA) et les schizophrenies precoces. Objectif : Clarifier les liens cliniques et biologiques entre TSA et schizophrenies a debut precoce (avant 18 ans) et meme tres precoce (avant 13 ans). Methodologie: Population de 62 sujets, divises en trois groupes selon l'âge de debut de la pathologie schizophrenique : strictement avant 13 ans (Very Early Onset Schizophrenia, VEOS), entre 13 et 18 ans (Early Onset Schizophrenia, EOS) et superieur ou egal a 18 ans (Adult Onset Schizophrenia, AOS). Pour chaque groupe, 2 evaluations cliniques sont effectuees : recherche d&#3...
    Reports of higher stress responsivity, altered sleep-wake cycle and a melatonin deficit in autism have stimulated interest in the cortisol circadian rhythm in individuals with autism. The study was conducted on 55 low-functioning children... more
    Reports of higher stress responsivity, altered sleep-wake cycle and a melatonin deficit in autism have stimulated interest in the cortisol circadian rhythm in individuals with autism. The study was conducted on 55 low-functioning children and adolescents with autism (11.3 ± 4.1 years-old) and 32 typically developing controls (11.7 ± 4.9 years-old) matched for age, sex and puberty. Behavioral assessment was performed using the Autism Diagnostic Observation Schedule (ADOS). Salivary samples for measurement of cortisol were collected during a 24-h period (at least 0800 h-Day 1, 1600 h, 0800 h-Day 2 for 46 individuals with autism and 27 controls, and 0800 h-Day 1, 1100 h, 1600 h, 2400 h, 0800 h-Day 2 for 13 individuals with autism and 20 controls). Overnight (2000 h-0800 h) urinary cortisol excretion was also measured. The autism group displayed significantly higher levels of salivary cortisol at all time-points, flatter daytime and nighttime slopes, higher 0800 h cortisol levels on Day 2 compared to Day 1, and greater variances of salivary and urinary cortisol. There was a significant relationship between salivary cortisol levels and impairments in social interaction and verbal language. Overnight urinary cortisol excretion was similar in the autism and control groups. Anticipation of the stressful collection procedure appears to contribute to the higher 0800 h-Day 2 versus 0800 h-Day 1 salivary cortisol levels in autism. This sensitization to stressors might be as, or even more, important clinically than exposure to novelty in autism. The similar group means for overnight urinary cortisol excretion indicate that basal HPA axis functioning is unaltered in low-functioning autism. The elevated salivary cortisol levels observed in autism over the 24-h period in a repeated stressful condition, flattened diurnal cortisol patterns and the apparent effect of anticipation are consistent with prior findings in high trait anxiety.
    Based on clinical, phenomenological and neurobiological observations, psychiatrists often report a deficit in time estimation in patients with schizophrenia. Cognitive models of time estimation in healthy subjects have been proposed and... more
    Based on clinical, phenomenological and neurobiological observations, psychiatrists often report a deficit in time estimation in patients with schizophrenia. Cognitive models of time estimation in healthy subjects have been proposed and developed for approximately 30 years. The current theory in the field of time perception, which is supported by a connectionist model, postulates that temporal judgement is based upon a pacemaker-counter device that depends mostly upon memory and attentional resources. The pacemaker emits pulses that are accumulated in a counter, and the number of pulses determines the perceived length of an interval. Patients with schizophrenia are known to display attentional and memory dysfunctions. Moreover, dopamine regulation mechanisms are involved in both the temporal perception processes and schizophrenia. Thus, it is still unclear if temporal impairments in schizophrenia are related to a specific disturbance in central temporal processes or are due to certain cognitive problems, such as attentional and memory dysfunctions, or biological abnormalities. The authors present a critical literature review on time perception in schizophrenia that covers topics from psychopathology to neuroscience. Temporal perception appears to play a key role in schizophrenia and to be partially neglected in the current literature. Future research is required to better ascertain the underlying mechanisms of time perception impairments in schizophrenia.