Biology subjects

Schmausser, M.

Publications and source records attributed to Schmausser, M..

3 recordsLinked to original sources

bioRxiv2026

Emotion Dysregulation Links Interoceptive Accuracy and Vagal Activity to Psychopathology in Male but not Female Adolescents

Background: Emotion dysregulation is common across psychiatric disorders, but the biological mechanisms underlying emotional vulnerability remain poorly understood. Cardiac vagal regulation and interoception, the perception of bodily signals, may jointly contribute to emotion regulation. We examined whether their interaction is associated with emotion dysregulation and psychopathology in adolescents receiving psychiatric inpatient treatment. Methods: We studied 279 adolescent psychiatric inpatients. Cardiac vagal regulation was assessed using heart rate variability and interoceptive accuracy using a measure of bodily signal perception. Structural equation modeling tested associations between cardiac vagal regulation, interoceptive accuracy, emotion dysregulation, depressive symptoms, and personality dysfunction, including sex specific pathways and interactions. Results: Here we show that associations between autonomic regulation, interoception, and psychopathology differ by sex. In male adolescents, lower cardiac vagal regulation is associated with greater emotion dysregulation, which is associated with higher depressive symptoms and greater personality dysfunction. These associations depend on interoceptive accuracy and are most evident at low to intermediate levels of bodily signal perception. Comparable pathways are absent in female adolescents. Conclusions: These findings indicate that interactions between cardiac regulation and bodily signal perception contribute to emotional vulnerability in a sex-dependent manner. Altered body-brain communication may contribute to divergent developmental pathways of psychopathology. Integrating sex specific autonomic and interoceptive processes may improve models of emotion regulation and psychiatric risk during adolescence.

neuroscience↗

bioRxiv2026

Postnatal Autonomic Development Predicts Adolescent Psychosocial Outcome

BackgroundThe maturation of the autonomic nervous system (ANS) has been suggested to play a crucial role in the development of emotion regulation and later psychosocial functioning. However, longitudinal evidence linking early autonomic development to long-term outcomes remains limited. This longitudinal study investigated the interplay between birth-related factors, early autonomic activity, and psychosocial outcomes across development. MethodsThe sample comprised 101 participants followed from two weeks to 14 years of age, with heart rate (HR) and vagally ediated heart rate variability (vmHRV) assessed at 2 weeks, 6 weeks, 3 months, 14 months, and 14 years. Linear models were used to examine associations between birth-related factors and early HR and vmHRV, as well as whether HR and vmHRV trajectories during the first 14 months predicted psychosocial outcomes at 5 and 14 years. ResultsMultiple birth-related factors significantly predicted HR and vmHRV at two weeks after birth. Moreover, flatter age-related increases in vmHRV and weaker decreases in HR during infancy predicted higher maternally reported psychosocial difficulties at 14 years in males only, with no such effects at 5 years or in females. ConclusionsThese findings underscore the importance of early autonomic maturation in shaping later psychosocial functioning, with effects on adolescent outcomes observed in males only. Early ANS trajectories may represent meaningful predictors of neurodevelopmental outcomes, highlighting their potential relevance for early identification of later psychosocial risk in a sex-specific manner.

physiology↗

bioRxiv2026

Cortical Thinning Predicts Resting Vagally Mediated Heart Rate Variability: A Longitudinal Study Across Adolescent Development

IntroductionVagally mediated heart rate variability (vmHRV) reflects parasympathetic cardiac control and serves as a peripheral marker of brain-body interaction. While studies in adults link higher vmHRV to greater cortical thickness regions related autonomic regulatory, little is known about its association with longitudinal cortical maturation during puberty, a period of pronounced cortical thinning. MethodsThis longitudinal study examined whether individual differences in cortical thinning trajectories are associated with vmHRV in two independent cohorts of children and adolescents. Structural MRI were acquired in an accelerated longitudinal design over three time points, each one year apart in two cohorts (n = 44; ages 9 and 12 at baseline). Cortical thickness was estimated using FreeSurfer, and annualized regional thinning slopes were derived for 62 cortical regions. vmHRV was measured one year later at follow-up. Elastic net regression with stability selection identified robust predictors, which were entered into linear models separately for each cohort. ResultsAcross both cohorts, vmHRV was associated with distributed patterns of cortical thinning. Consistent associations emerged in medial and posterior midline regions, including the precuneus, isthmus of the cingulate cortex, and medial prefrontal and orbitofrontal areas. Associations showed heterogeneous directions across regions, contrasting with uniform adult findings. DiscussionvmHRV may be linked to network-level cortical maturation during adolescence, particularly within default mode and fronto-limbic systems. Findings extend adult work by demonstrating that brain-autonomic coupling emerges during development and is characterized by regionally differentiated trajectories of cortical thinning.

neuroscience↗