THE INVISIBLE PAIN OF ADHD: A NEUROBIOLOGICAL AND BEHAVIORAL ANALYSIS OF REJECTION SENSITIVE DYPHORIA (RSD) IN ADULTS
DOI:
https://doi.org/10.63330/sasciencesv6n2-021Keywords:
Attention Deficit Disorder with Hyperactivity, Emotional Regulation, Rejection Sensitive Dysphoria, Cognitive Neuroscience, Cognitive Behavioral TherapyAbstract
Introduction: Attention-Deficit/Hyperactivity Disorder (ADHD) in adults manifests beyond the classic operational cognitive deficits described in the DSM-5. Emotional Dysregulation (ED) configures an intrinsic pillar of the disorder, highlighting the clinical construct of Rejection Sensitive Dysphoria (RSD). RSD is characterized by acute, reactive episodes of intense emotional pain triggered by perceived criticism, failure, or social exclusion. Objective: To analyze the neurobiological underpinnings of RSD in adult ADHD and discuss how this affective short-circuit acts as a catalyst for chronic defensive phenotypes—namely people-pleasing, paralyzing perfectionism, and preventive social withdrawal—while integrating these findings into pharmacological and psychotherapeutic management guidelines. Methodology: An integrative literature review was conducted across PubMed, Scopus, and SciELO databases, encompassing empirical studies and reviews published between 2016 and 2026. Controlled vocabulary (MeSH/DeCS) and free-text terms were cross-referenced using Boolean operators. Results and Discussion: Evidence demonstrates that RSD stems from a breakdown in functional connectivity between the prefrontal cortex and the amygdala (disrupted top-down control), coupled with dopaminergic hypofunction and hyperactivation of the dorsal anterior cingulate cortex, which processes social rejection identically to physical pain. As a defense mechanism against this visceral distress, the individual develops maladaptive behavioral strategies. Effective clinical management requires a combined approach: immediate neurochemical stabilization through alpha-2 adrenergic agonists and dopaminergic stimulants, paired with cognitive restructuring via Cognitive Behavioral Therapy (CBT) and acute distress tolerance training through Dialectical Behavior Therapy (DBT). Conclusion: RSD imposes severe functional impairments on adults with ADHD. Refinement of screening protocols and the development of specific psychometric scales are urgently needed to consolidate diagnostic precision and therapeutic efficacy in contemporary clinical practice.
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