Understanding Motor Stereotypies as a Transdiagnostic Phenotype.

Motor stereotypies (MS) are repetitive, rhythmic actions varying in complexity and presentation. Parents and teachers often notice these movements in children at home or in the classroom, prompting clinical attention. Concerns typically arise regarding the potential adverse consequences of these movements on the child, their impact on others, and whether they signal chronic neurodevelopmental conditions such as autism spectrum disorder (ASD). This Clinical Perspectives emphasizes MS as a common, transdiagnostic phenotype. It is crucial for clinicians and families to understand their characteristics, typical course, and potential co-occurring conditions, and that MS do not always signify a neurodevelopmental disorder nor always require intervention.