Osteopathic Manipulative Treatment for Constipation in People With Rett Syndrome

Constipation consists of bowel symptoms characterized by difficulty or infrequency passage of stool, stiff stool, or a feeling of incomplete evacuation. However, its impact goes far beyond this definition. Constipation negatively impacts the quality of life (QoL) of children and adults suffering from this condition, affecting mental and physical-related QoL. Additionally, a negative impact of constipation on QoL was found in parents carrying children with constipation, affecting family functioning. People with an intellectual disability present a constipation rate of over 33%. Rett syndrome (RTT) is a complex neurodevelopmental disorder affecting about 1/10,000 females and a few males worldwide. Chronic constipation is persistent in people with RTT, with a reported prevalence higher than 74%. Specific recommendations for constipation management in RTT were developed, including behavioral, pharmacological, and surgical considerations. Recently, the literature has been enriched with papers describing the osteopathic treatment efficacy in reducing constipation. Emerging literature reported the efficacy of OMT in reducing constipation symptoms and improving QoL in typically developed people, as well as in children with disability. The present study aims to evaluate the efficacy of a specific OMT for managing chronic constipation in people with RTT and its impact on primary caregivers' quality of life. Research questions: * Can an OMT improve the constipation of people with RTT, increasing the frequency of bowel movements? * Can the effects of an OMT aimed at reducing the constipation symptoms in people with RTT positively impact the participants' parents' constipation-related QoL? Twelve individuals with RTT and their families will be recruited to participate in this single-blind parallel group-randomized study. Participants will be randomly divided into an experimental group (EG) and a control group (CG). After the preliminary evaluations, each participant will un