ESTIMULAÇÃO VAGAL AURICULAR TRANSCUTÂNEA VIA PRÁTICA PSICOMOTORA AQUÁTICA: EFEITOS NA AUTORREGULAÇÃO DE CRIANÇAS COM TRANSTORNO ESPECTRO AUTISTA

Introduction: Autism Spectrum Disorder (ASD) is characterized by challenges in emotional self-regulation, body tone, and social interactions. Transcutaneous auricular vagus nerve stimulation has been investigated as a non-invasive neuromodulation strategy, with potential implications for autonomic regulation. Objective: To observationally investigate behavioral responses associated with auricular vagal stimulation mediated by water contact during Aquatic Psychomotor Therapy sessions. Methods: This observational study was conducted over a 15-month period with 24 children diagnosed with ASD (18 boys and 6 girls). Observations took place during individual Aquatic Psychomotor Therapy sessions using the technique known as Waters of Feelings, which promotes contact between the auricular region and the aquatic environment. Data were recorded in field diaries and analyzed descriptively. Results: The observations indicated frequent occurrences of bodily relaxation, tonic reorganization, and reduction of disorganized behaviors, as well as increased relational availability, eye contact, and engagement in interactions. Occasional episodes of vocal emissions, spontaneous movements, and improved psychomotor organization were also recorded during auricular contact with water. Conclusion: Although causal relationships cannot be established, the study suggests that auricular stimulation associated with aquatic psychomotor practice may promote processes of tonic, emotional, and relational self-regulation in children with ASD, constituting a complementary non-pharmacological approach worthy of further investigation.