Intellectual Disability

Background: People with intellectual disability (ID) often have physical disabilities as well. These physical problems can affect their bones, muscles, nerves, and gastrointestinal tracts. All of these issues can also cause pain. Yet little research has been done on pain in people with ID. Objective: To compare brain responses to unpleasant stimuli in people with and without ID. Eligibility: People aged 8 to 30 years diagnosed with an ID. Healthy volunteers without an ID are also needed. Design: The study requires only 1 visit of up to 4 hours. Participants with ID may come for up to 5 shorter visits instead. Participants will take a test to measure their level of ID. They will have a physical exam. Both groups will answer questions about pain and how their bodies react to it. They will answer questions about how they respond to things they see, feel, hear, smell, and taste. They will answer questions about their social behaviors. Caregivers may answer questions if the participant cannot. Both groups will have a test to measure their brain activity. Participants will wear a special cap, like a swim cap, with sensors and wires. Sensors to examine the heart will be placed on the skin of their chest with stickers. An elastic band will be placed around the middle of their body to measure how fast they are breathing. Sensors to measure sweat will be placed on two fingers. Participants will have heat, cold, brushing, and mild electrical stimuli to different parts of their body. Participants will rank how each stimulus feels using a scale with numbers or a scale with faces.

Background: People with intellectual disability (ID) often have physical disabilities as well. These physical problems can affect their bones, muscles, nerves, and gastrointestinal tracts. All of these issues can also cause pain. Yet little research has been done on pain in people with ID. Objective: To compare brain responses to unpleasant stimuli in people with and without ID. Eligibility: People aged 8 to 30 years diagnosed with an ID. Healthy volunteers without an ID are also needed. Design: The study requires only 1 visit of up to 4 hours. Participants with ID may come for up to 5 shorter visits instead. Participants will take a test to measure their level of ID. They will have a physical exam. Both groups will answer questions about pain and how their bodies react to it. They will answer questions about how they respond to things they see, feel, hear, smell, and taste. They will answer questions about their social behaviors. Caregivers may answer questions if the participant cannot. Both groups will have a test to measure their brain activity. Participants will wear a special cap, like a swim cap, with sensors and wires. Sensors to examine the heart will be placed on the skin of their chest with stickers. An elastic band will be placed around the middle of their body to measure how fast they are breathing. Sensors to measure sweat will be placed on two fingers. Participants will have heat, cold, brushing, and mild electrical stimuli to different parts of their body. Participants will rank how each stimulus feels using a scale with numbers or a scale with faces.

The Rett Syndrome Registry is a longitudinal observational study of individuals with MECP2 mutations and a diagnosis of Rett syndrome. Designed together with the IRSF Rett Syndrome Center of Excellence Network medical directors, this study collects data on the signs and symptoms of Rett syndrome as reported by the Rett syndrome experts and by the caregivers of individuals with Rett syndrome. This study will be used to develop consensus based guidelines for the care of your loved ones with Rett syndrome and to facilitate the development of better clinical trials and other aspects of the drug development path for Rett syndrome.

This observational natural history study will follow individuals with MEHMO (Mental disability, Epileptic seizure, Hypopituitarism/Hypogenitalism, Microcephaly, Obesity) syndrome or an eIF2-pathway related disorder, who have symptoms such as intellectual delay, seizures, abnormal hormone and blood sugar levels, and decreased motor skills. No current treatment for these conditions is available. A major impediment to the testing of potential therapeutic interventions is the lack of well-defined outcome measures. This protocol seeks to identify biochemical and clinical markers to monitor disease progression, and better understand the natural history of these conditions. Any person diagnosed with MEHMO syndrome or related conditions, who can travel to the NIH Clinical Center can participate in this study. The study involves: * General health assessment and evaluation * Imaging studies * Laboratory tests * Collection of blood, urine, spinal fluid, skin biopsy.

This study will measure the effects of a brief one-time eLearning intervention on researcher Knowledge, Attitudes, and Perceptions (KAP) of including people with disabilities (PWDs) in biomedical \& behavioral research. Researchers will be recruited from across the Einstein/Montefiore network, and other medical centers with a focus on CTSAs.

Many neurodevelopmental, psychiatric, and medical disorders are commonly associated with intellectual disability. The presence of neurodevelopmental and psychiatric (NDP) comorbidities has been reported to negatively impact the clinical outcomes of bowel or bladder dysfunction. Pediatric bladder and bowel dysfunction (BBD) is a common but underdiagnosed condition characterized by a spectrum of lower urinary tract symptoms and is often associated with constipation. Lower urinary tract symptoms include dysuria, urinary urgency, daytime incontinence, and enuresis, while bowel symptoms include constipation and encopresis. Most BBD cases are functional and not neurogenic in origin. In children with special needs, all types of urinary incontinence are reported to occur more frequently compared to children without developmental or behavioral disabilities. Intellectual disability (IQ \<70) is also identified as a significant risk factor for urinary incontinence, with prevalence increasing as IQ decreases. In these children, lower urinary tract symptoms such as overactive bladder, dysfunctional voiding, and low fluid intake are also observed. Furthermore, according to support plans and medical records, 94% of individuals with intellectual and multiple disabilities experience constipation. Interestingly, lower levels of intellectual disability (profound and severe ID) have been associated with a lower prevalence of constipation. Although there are studies in the literature examining bladder and bowel functions separately in specific diagnostic groups with intellectual disability, the number of studies that assess bladder and bowel functions together in children with any form of intellectual disability is limited. Moreover, to our knowledge, there is no study in the literature that evaluates bladder and bowel functions along with child participation and parental quality of life in children with intellectual disability. Based on this gap in the literature, the aim of our study is to examine bladder and bowel functions, participation, and quality of life in children with intellectual disability

The goal of this study is to help children with autism and a co-occurring intellectual disability and their families learn practical strategies for managing issues like irritability, aggression, and other challenging behaviors. The main objective of this study is: To adapt current Regulating Together materials to create an outpatient group program for emotion dysregulation in autism and co-occurring intellectual disability (ASD + ID) that will improve psychosocial outcomes for youth with ASD + ID.

Down syndrome (DS) is typically caused by an extra chromosome 21 in the cell nucleus (trisomy 21, or T21). T21 is both the most common cause of genetically defined intellectual disability and the earliest documented cause of Alzheimer's disease (AD)-type pathology. Currently, all presymptomatic individuals with DS are classified as having 'Stage 0' DS-associated AD (DSAD). DSAD pathology evolves inexorably, with virtually all individuals with DS developing AD pathology by age 40, and approximately 50% meeting clinical dementia diagnosis criteria at 55 years of age. This study will test the hypothesis that the FDA-approved AD drug memantine, at higher-than-standard doses, may be effective as a cognitive enhancer in adolescents and young adults with DS. The primary goal of this phase 1b clinical trial will be the assessment of the safety and tolerability of three memantine doses in persons with DS. In addition, we will assess the effect of this drug on cognitive test scores and plasma biomarkers of AD in the study participants. Finally, we will also investigate steady-state plasma levels of memantine and the time course of memantine plasma levels after a single dose in the study participants (pharmacokinetics, or PK). The data generated through this phase 1b study will provide the essential safety, PK, and preliminary efficacy signals required to advance a phase 2 trial evaluating high-dose memantine as a first-in-class therapeutic strategy in DS.

Background: Around 15% of the global population has some form of disability. Rights to obtain proper health care is an emphasis in the United Nationals Convention on the Right of People with Disability. Due to the importance of improving vision health for people with disabilities, studies on how to identify vision problems becomes extremely important in policy formulation for all countries. Among all types of disabilities, people with intellectual disability (ID) are among the ones where vision problems are the hardest to detect. Currently, no caregiver assessable scales are available, as a result, adults with ID are at high risk of delayed diagnose for common ocular conditions. Objectives: This is a one-year project. The objective of this study is two folds: 1. To develop an item bank of ocular conditions of adults with ID; 2. To develop a scale for caregivers to detect ocular conditions for adults with ID, and to validate the reliability, construct validity and responsiveness of the scale.

The primary goal of this study is to investigate the efficacy of deutetrabenazine treatment of TD in this previously untreated patient population. Compare movement disorder deutetrabenazine treatment response in persons with IDD to response seen in patients without IDD treated with deutetrabenazine in other treatment settings (per literature review). Compare global deutetrabenazine treatment response with validated instruments. In addition, we plan to: * Assess the safety of deutetrabenazine in the treatment of TD in persons with IDD. * Assess change in Activities of Daily Living (ADLs) in persons with IDD and TD treated with deutetrabenazine, utilizing a validated ADL instrument. * Assess change in Quality of Life (QOL) in persons with IDD and TD treated with deutetrabenazine, utilizing a validated QOL instrument. * Assess caregiver burden with a validated caregiver burden instrument. In this study, 25 participants with IDD and TD will undergo Deutetrabenazine treatment for 24 weeks. The participants will be seen for a total of 5 visits: at baseline, and at follow up visits at 3 weeks, 6 weeks, 12 weeks, and 24 weeks. This study does not include a comparison group. Therefore, researchers will compare the response of the study participants to deutetrabenazine treatment with those from a previous reported work that resulted in the FDA approval of this medication. This will be an open-label, Phase 4 study.

This study will be conducted to determine the effect of gardening activities applied to mildly intellectually disabled secondary school students on their quality of life and to examine their views on these activities in depth.

People with IDD (intellectual and developmental disability) have very high rates of obesity and die prematurely from cardiometabolic disease. While antipsychotics contribute to this problem, their use is necessary and appropriate in a significant subgroup of individuals with IDD. Exercise and diet interventions have limitations and may not be sufficient, requiring effective adjunctive pharmacological approaches to target obesity and related comorbidities in IDD. However, persons with IDD treated with antipsychotics are systematically excluded from clinical trials hindering development of evidence to help guide safe and effective treatment of these comorbidities. Moreover, evidence from other disorders cannot be extrapolated to IDD given inherent biological differences between disorders. This trial will address the identified gaps, which extend beyond cardiovascular morbidity and negatively impact psychosocial outcomes, in a hugely underserviced population.This is the the first RCT (randomized control trial) to examine the efficacy of metformin in overweight or obese adults with IDD who have experienced antipsychotic-induced weight gain. By generating efficacy data for a very accessible and scalable intervention, allows for guideline and implementation strategies to address a recalcitrant health problem.

This randomized controlled trial aims to evaluate the effect of digital intelligence games on visual and cognitive performance in young individuals with intellectual disabilities. Participants aged 18-35 years receiving services from EÇADEM in Istanbul will be randomly assigned to either an intervention group receiving digital intelligence game training using the MentalUP application or a control group receiving routine services. Visual memory and cognitive performance will be assessed using the Benton Visual Retention Test and the Standardized Mini Mental Test at baseline, 3 months, 6 months, and 12 months. The study will investigate the short- and long-term effects of digital cognitive training on visual and cognitive functioning.

Purpose: Conduct a wait-list randomized controlled trial (RCT) of an inclusive physical activity program called PACE for adults with intellectual disability (ID) who are not yet showing signs of Alzheimer's Disease (AD)/age-related dementias (ARD). Participants: Participants include 120 adults with ID, their caregivers, and their coaches (up to 360 individual participants, grouped as triads), recruited through the University of North Carolina at Chapel Hill and the University of Arkansas. Participants also include 16 exercise professionals. Procedures (methods): Each cohort will include 20 triads who are randomly assigned to the PACE program or the waitlist control group.

Following on from the third national plan for rare diseases (PNMR3), the main objectives of the PNMR4 are to reduce diagnostic uncertainty and dead ends and to strengthen translational research to promote diagnosis and the development of new treatments in the field of rare diseases. To this end, the French Genomic Medicine Plan 2025 (PFMG2025) is organizing the rollout of whole genome sequencing (WGS) for diagnostic purposes. This technological milestone, covering regions outside the coding regions, has recently enabled the identification of variations in the RNU4-2 gene as a major cause of Intellectual Developmental Disorder (IDD), accounting for approximately 0.4% of cases. RNU4-2 is a gene encoding a small nuclear RNA (snRNA), which is not translated into protein, and whose variations are not accessible to exome sequencing techniques. However, based on current knowledge, these techniques are based on short-read sequencing technology and can diagnose up to 50% of patients. It is therefore necessary to develop new techniques to detect variations not identified by these techniques. In this context, the development of third-generation sequencing, particularly using Nanopore technology, now makes it possible to combine genomic and post-genomic approaches through long-read whole genome sequencing coupled with the detection of methylated cytosines on native DNA. This new approach therefore enables the simultaneous detection of point or structural genomic variants, methylation abnormalities, and haplotype reconstruction. Numerous studies have shown that this strategy improves the diagnosis rate of rare diseases and could become a first-line genetic test. DNA methylation is an epigenetic modification that does not cause changes in the genomic sequence but regulates the transcription (RNA synthesis) of genes and therefore their expression. Methylation studies are performed either to establish an episignature or to search for methylation abnormalities. An episignature is the result of a variation in a gene known to regulate methylation marks. Methylation abnormalities are already known and sought after in targeted analysis for certain diseases such as Prader-Willi/Angelman syndromes and Beckwith-Wiedemann/Silver-Russell syndromes. The contribution of methylation analysis to the diagnosis of other diseases has recently been demonstrated. For example, in methylmalonic aciduria and homocystinuria type cblC associated with the autosomal recessive gene MMACHC, promoter methylation analysis revealed hypermethylation linked to the presence of an intronic variant of the PRDX1 gene. This intronic variant leads to the synthesis of an aberrant antisense RNA overlapping the promoter of the MMACHC gene, causing its hypermethylation. In 2024, combined whole-genome and methylation analysis in patients with porokeratosis led to the discovery of the FDFT1 gene. In general, the study of methylation profiles has shown its value in reducing diagnostic uncertainty in patients with rare diseases who have not been diagnosed after genome analysis. The search for methylation abnormalities (or epimutation) at the pan-genomic level in the context of molecular diagnosis of rare diseases remains largely inaccessible and poorly described in the literature. The techniques routinely used for their detection are most often based on bisulfite treatment and PCR amplification. The disadvantages of bisulfite treatment are that it degrades DNA, preventing long-read applications, that it does not distinguish between 5mC and 5hmC methylation, and that failure to treat unmethylated cytosines can lead to false positives . In addition, phase determination with a genomic variant identified in short reads requires complementary techniques such as SNP arrays. This approach therefore appears to be a major technological advance in the fight against diagnostic uncertainty in rare diseases and is part of the move towards precision medicine for patients. As part of our Reference Center for Developmental Anomalies and Malformation Syndromes of Southwest Occitanie Réunion (CRMR ADSOOR) at Bordeaux University Hospital, we have developed clinical and molecular expertise, particularly in the field of developmental anomalies with intellectual development disorders (particularly chromatinopathies and Rubinstein Taybi syndrome and albinism. In 2024, 2,300 consultations were carried out at the CRMR. In addition, 243 and 228 genome or exome analyses were interpreted in our molecular biology laboratory for albinism and intellectual development disorder and malformation syndrome, respectively. Our expertise in these two areas therefore represents the best starting point for the development of this pilot project using this innovative approach at Bordeaux University Hospital.

This study aims to enhance employment outcomes for young adults with autism and intellectual and developmental disabilities (IDD) through the implementation of an evidence-based supported employment model known as Individual Placement and Support for Autism (IPS-AUT). The study will evaluate the feasibility, acceptability, and effectiveness of IPS-AUT in promoting Competitive Integrated Employment (CIE). The trial will involve partnerships with supported employment agencies, training providers in IPS-AUT, and assessing employment outcomes and implementation factors. The ultimate goal is to create a scalable, evidence-based employment support model for individuals with autism.

The goal of this clinical trial is to evaluate how preference for communication approach (e.g., using a touch talker versus picture cards) impacts treatment maintenance in the context of treatment to reduce challenging behavior exhibited by individuals with intellectual and/or developmental disabilities. As well, the clinical trial will evaluate how this preference impacts treatment relapse when care providers implement intervention and will identify potential demographic variables (e.g., age and symptom severity) that affect outcomes. The main question\[s\] it aims to answer \[is/are\]: Preferred communication strategies will persist to a greater extent when intervention is disrupted, relative to less preferred communication strategies. Communication modality preference will increase persistence for individuals with lower pre-experimental symptom severity scores and higher pre-experimental communication functioning scores. We predict demographic characteristics and developmental level will not impact intervention outcomes. Two groups will be compared. Group 1 will receive initial intervention using a preferred communication strategy. Group 2 will receive initial intervention using a non preferred, but effective, communication strategy. Intervention type will then be reversed. Researchers will compare preferred and non preferred interventions on continued expression of the communication strategy when intervention is challenged. Participants will exhibit alternative appropriate communicative behavior as a means of replacing/reducing challenging behavior. This will take place using (a) preferred communication strategies and (b) non preferred communication strategies. Following successful intervention with each type of communication, intervention will be challenged and continued use of the communication strategy will be measured.

Anxiety can be a debilitating and common concomitant diagnosis in autism spectrum disorders (ASD). Dependent on age and subtype of anxiety, the prevalence of anxiety in individuals with autism ranges between 1.7-84%. Meanwhile, the prevalence rate of intellectual disability (ID) in individuals with ASD ranges between 50-80% based on previous studies. There is an even greater risk of anxiety, ranging between 13.6- 43%, in individuals with ASD and ID. Despite the high prevalence of anxiety within this population, there are limited studies exploring assessments and treatments geared towards addressing anxiety in autism and intellectual disabilities. Previous studies have been limited to children who are identified as high functioning, or identified as low functioning without a concomitant diagnosis of ID. Given this, the present study focuses on the population of individuals with ASD and ID by exploring the feasibility of a CBT intervention designed for individuals with high-functioning autism This pilot study aims at addressing and treating anxiety in children with ASD and intellectual disability through the Facing Your Fears (FYF) intervention. Facing Your Fears is a cognitive behavioral therapy (CBT) program specifically designed to address anxiety symptoms in children with autism. Research exploring the effectiveness of the FYF intervention within the population of individuals with ASD and ID is limited. This study aims at evaluating the feasibility of the Facing Your Fears program to address anxiety in children with ASD and ID, while evaluating the effectiveness of this intervention in larger group settings. The duration of the study will run over two 12-week cycles with study assessments conducted in-person, once a week. The study will involve 5-6 parent-child dyads to make up 10-12 participants per cycle. The child participants must be between the ages of 12-18 years old and have a confirmed diagnosis of ASD that meets DSM-V criteria. The study will commence with a month of recruitment, and a month allotted for collating data and assessments, before and after each 12-week intervention cycle. Evaluations will take place at screening, every study visit, and post intervention. Alongside the study evaluations, weekly sessions will involve didactic and practice sessions, with the last 30 minutes reserved for parent training. The sessions focus on the use and generalization of the taught strategies to address anxious symptoms, and exposure sessions outside of the weekly sessions. At the end of the 12-week cycle, the assessments related to the study outcomes will be administered again to allow investigators to compare and analyze pre- and post-intervention scores.

The purpose of this study is to analyze patterns in individuals with hnRNP (and other) genetic variants, including their neurological comorbidities, other medical problems and any treatment. The investigators will maintain an ongoing database of medical data that is otherwise being collected for routine medical care. The investigators will also collect data prospectively in the form of questionnaires, neuropsychological assessments, motor assessments, and electroencephalography to examine the landscape of deleterious variants in these genes.

The goal of this study is to see if adding hands-on cooking classes to a weight management program (called Chef-ID) helps young adults with intellectual disabilities lose more weight and keep it off compared to a standard weight loss program. The study will last 24 months and include three phases: 6 months of active support, 12 months of maintenance, and 6 months with no contact. The investigators will look at how much weight participants lose over the first 18 months. Changes in cooking skills, body fat, health markers (like blood pressure and cholesterol), daily living skills, and caregiver stress will be tracked. Finally, factors that might help or prevent weight loss, and how changes in weight and body fat are linked to overall health will be explored. This research will help inform on how to better support healthy lifestyles for people with intellectual disabilities.

Background: Parents with intellectual and developmental disabilities (IDDs) have a tendency to provide insufficient caregiving and often need parenting support to prevent neglect and child removal. However, parents with IDDs are not provided with appropriate support, and there is a lack of evidence-based programmes tailored to these parents' needs. Parenting Young Children (PYC) is a home-based parenting programme developed for parents with IDDs. PYC has shown promising clinical results in interview-based studies, but there is no evidence of its effectiveness. The purpose of the proposed study is to evaluate the PYC programme for improving parenting in parents with IDDs where there is risk of child neglect. The study will include a quantitative evaluation, a process evaluation, and a qualitative evaluation of the children's and parents' perspectives on participating in PYC. Methods: The quantitative evaluation will have a multi-centre, non-randomised, comparative study design. Eligible for participation are parents with IDDs who have children aged 0-9 years living at home and who are assessed as needing tailored parenting support. Thirty parents receiving PYC and thirty parents receiving treatment as usual (TAU) will be recruited from Swedish municipal social services. Outcome variables will be examined before and after the intervention, with a follow-up 6 months after completing the intervention. The primary outcome will be goal-attainment in parenting skills, and secondary outcomes will be parental self-efficacy and children's wellbeing. Interview methods will be used to explore the perspectives of parents and children in the PYC group. Discussion: This study is motivated by the need for evidence-based support for parents with IDDs, and it focuses on upholding the centrality of child-caregiver relationships and family preservation, as well as children's rights and the rights of people with disabilities. Social services have expressed ethical concerns with employing a randomized design for this vulnerable group, and this study will therefore evaluate PYC in a non-randomized comparative study.

Adults with intellectual disabilities have great difficulty in adapting to social situations and relationships. Cognitive impairment associated with intellectual disability are important factors to understand their difficulties in processing social information. In the field of recognition of facial emotions in particular, basic cognitive processes such as visuospatial and attentional functions, are heavily involved. Cognitive remediation is a management tool widely used by practitioners to help patients who experience cognitive difficulties. Currently, no program can meet specific and validated the problems are adults with intellectual disabilities manner in their daily functioning

The overarching aim is to generate knowledge to reduce incidence of pain in non-verbal patients' everyday life. The trial will 1) evaluate how HR can be used to identify potentially painful care procedures that should be re-evaluated in terms of the approach taken; 2) test the effect of heart rate (HR)-informed changes in potentially painful care procedures on biomarkers of pain, and 3) assess how six weeks of communication through HR affects the quality of communication between patient and caregiver.

Some persons with intellectual disability or comprehensive cerebral palsy cannot communicate unequivocally how they are, how they react to situations and people, whether they are in pain or experience discomfort, anger or fear. Their modes of communication (sounds, grimacing etc) may be unintelligible or ambiguous to their caregivers. With the use of heart and/or respiration monitors the investigators aim to give these persons a means to communicate their immediate reactions or responses. The respiration monitor is meant to register sleep at night, so that the participants can communicate whether they have slept well or not the previous night.

The investigator would like to investigate the impact of theta-burst stimulation over left DLPFC in autism with minimally verbal ability or intellectual disability