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Orthopedic Conditions and Interplay with Functional Abilities and "MECP2" Variant Subtype in Rett Syndrome Patients
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María Galán-Olleros; Elena González-Alguacil; Víctor Soto-Insuga; María Teresa Vara-Arias; Nelmar Valentina Ortiz-Cabrera; J. Ignacio Serrano; Rosa M. Egea-Gámez; Juan José García-Peñas; Ignacio Martínez-Caballero; Salvadora Aleza Esteras; Carlota Aparicio Fernández de Gatta; Elvira Cañedo Villarroya; Daniel Clemente Garulo; Rocío Falcón Roca; Silvia Gutiérrez Priego; Blanca López Monedero; Paula Moreno Gutiérrez; Miriam Martín Mangas; Francisca Romero Andujar; Amalia Tamariz Martel – Journal of Autism and Developmental Disorders, 2025
Purpose: Rett syndrome (RTT) is a rare multi-systemic disorder primarily linked to mutations in "MECP2" gene. This study aims to describe the prevalence of orthopedic conditions in RTT patients, and examine their intricate interplay with functional capabilities, and "MECP2" variant subtypes. Methods: Conducted as a…
Descriptors: Genetic Disorders, Intellectual Disability, Physical Disabilities, Patients
Genetic Subtypes of Phelan-McDermid Syndrome Exhibit Similar Rates of Change Despite Differences in Level of Impairment in Developmental Constructs
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Tess Levy; Cristan Farmer; Siddharth Srivastava; Kristina Johnson; Jadyn Trayvick; Camille Brune; Alexandra Massa; Hailey Silver; Paige M. Siper; Jessica Zweifach; Danielle Halpern; Jennifer H. Foss-Feig; Jonathan A. Bernstein; Elizabeth Berry-Kravis; Craig M. Powell; Mustafa Sahin; Latha Valluripalli Soorya; Audrey Thurm; Joseph D. Buxbaum; Alexander Kolevzon – American Journal on Intellectual and Developmental Disabilities, 2025
The clinical spectrum of Phelan-McDermid syndrome (PMS) is varied, with wide-ranging degrees of intellectual disability, developmental delays, behavioral abnormalities, and medical features. Different types of genetic variation lead to PMS, and differing genotypes (e.g., size of deletion or type of variant) account for some of this variability,…
Descriptors: Genetics, Genetic Disorders, Intellectual Disability, Developmental Delays
Experiences and Support Needs of Siblings of Individuals with Prader-Willi Syndrome--Findings from a Two-Stage Qualitative Study
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Meghana Wadnerkar Kamble; Jen Dawe; Karen Bunning – Journal of Applied Research in Intellectual Disabilities, 2025
Background: There is limited evidence exploring sibling's perspective in Prader-Willi syndrome research. Objectives: To investigate the experiences and support needs of the siblings of individuals with Prader-Willi syndrome. Methods: This two-stage qualitative study involved siblings aged 11 years onwards (n = 11) and parents (n = 8). Stage 1…
Descriptors: Genetic Disorders, Intellectual Disability, Siblings, Parents
Perceptual Experiences of Autistic People with an Intellectual Disability and People with Williams Syndrome: A Reflexive Thematic Analysis
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Freya Elise; Brian Irvine; Jana Brinkert; Charlie Hamilton; Emily K. Farran; Elizabeth Milne; Gaia Scerif; Anna Remington – Journal of Applied Research in Intellectual Disabilities, 2025
Background: Autistic people without intellectual disabilities have increased perceptual capacity: they can process more information at any given time compared to non-autistic people. We examined whether increased perceptual capacity is evident across the autistic spectrum (i.e. for autistic people with intellectual disabilities) and whether it is…
Descriptors: Autism Spectrum Disorders, Genetic Disorders, Adults, Intellectual Disability
Which Score for What? Operationalizing Standardized Cognitive Test Performance for the Assessment of Change
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Cristan Farmer; Audrey Thurm; Tanvi Das; E. Martina Bebin; Jonathan A. Bernstein; Elizabeth Berry-Kravis; Joseph D. Buxbaum; Charis Eng; Thomas Frazier; Antonio Y. Hardan; Alexander Kolevzon; Darcy A. Krueger; Julian A. Martinez-Agosto; Hope Northrup; Craig M. Powell; Latha Valluripalli Soorya; Joyce Y. Wu; Mustafa Sahin – American Journal on Intellectual and Developmental Disabilities, 2025
Developmental domains, such as cognitive, language, and motor, are key concepts of interest in longitudinal studies of intellectual and developmental disabilities (IDD). Normative scores (e.g., IQ) are often used to operationalize performance on standardized tests of these concepts, but it is the interval-distributed person-ability scores that are…
Descriptors: Cognitive Tests, Intelligence Tests, Cognitive Ability, Intellectual Disability
Characterizing Developmental and Behavioral Profiles in Developmental Synaptopathies to Inform Clinical Trial Endpoints
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Latha Valluripalli Soorya; Camille W. Brune; Cristan A. Farmer; Edith V. Ocampo; Natalie I. Berger; Deborah A. Pearson; Robyn M. Busch; Patricia Klaas; Paige Siper; Kristn Currans; Amanda C. Gulsrud; Jennifer M. Phillips; Rajna Filip-Dhima; Sarah E. O’Kelley; Thomas W. Frazier; Tess Levy; Allison L. Wainer; Joseph D. Buxbaum; Craig M. Powell; Jonathan A. Bernstein; Simon K. Warfield; Darcy A. Krueger; E. Martina Bebin; Hope Northrup; Shafali S. Jeste; Alexander Kolevzon; Elizabeth Berry-Kravis; Mustafa Sahin; Siddharth Srivastava; Audrey Thurm – American Journal on Intellectual and Developmental Disabilities, 2025
The Developmental Synaptopathies Consortium is a multisite natural history network studying rare, neurogenetic syndromes associated with synaptic dysfunction and developmental delays. One aim of the Consortium is clinical trial readiness, including identifying clinical concepts and validating their measurement. We evaluated the scope and…
Descriptors: Intellectual Disability, Genetic Disorders, Neurological Impairments, Measurement Techniques
Evaluating Patients with Mucopolysaccharidosis Type III: A Scoping Review on Diagnostic and Follow-Up Approaches
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Agustina Sabino Romagnoli; Letícia Nunes Campos; Daniel Fernandez-Guzman; Sofia Wagemaker; Federico Fernandez Zelcer; Carlos Stegmann; Carina F. Argüelles; Laura F. Sosa; Ayla Gerk; Jorgelina Stegmann – Journal of Applied Research in Intellectual Disabilities, 2025
Background: Mucopolysaccharidosis type III (MPS III) is a rare lysosomal storage disease with systemic complications. This scoping review aimed to synthesise evidence regarding methods to diagnose and monitor MPS III. Methods: We searched 10 databases for English and Spanish citations published from 2017 to 2022. Our study focused on human-based…
Descriptors: Clinical Diagnosis, Patients, Genetic Disorders, Diseases
Impact of Receiving Genetic Diagnoses on Parents' Perceptions of Their Children with Autism and Intellectual Disability
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Robert Klitzman; Ekaterina Bezborodko; Wendy K. Chung; Paul S. Appelbaum – Journal of Autism and Developmental Disorders, 2025
To assess whether genetic test results identifying the cause of a child's autism, when accompanied by other neurodevelopmental disorders (NDD), including intellectual disability, alter how parents perceive and treat their child. 28 parents of 22 individuals with autism (mean age: 15 years), usually with other NDDs, were interviewed after receiving…
Descriptors: Genetic Disorders, Screening Tests, Autism Spectrum Disorders, Neurodevelopmental Disorders
Determining Rates of Genetic Testing in the Evaluation of Autism Spectrum Disorder and Intellectual and Developmental Disorder
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Kyla Arcebido; Emily Val Tuliao; Andryella Maxie Ibarra; Kai Russell; Aracelly Valdes; Sohum Shinkre; Samantha Gefen; Amelia Evans; Sabrina Barella; Joelle Wadei; Isabella Quinon; Takahiro Soda – Autism: The International Journal of Research and Practice, 2025
Genetic tests, such as Fragile X and Chromosomal Microarray, are recommended as a standard of care during the evaluation of autism spectrum disorder (ASD) and other neurodevelopmental disorders. However, previous research demonstrates low rates of genetic testing. This study aimed to identify the rates of genetic testing and patient demographic…
Descriptors: Genetic Disorders, Autism Spectrum Disorders, Neurodevelopmental Disorders, Databases