The Mirror Psychopathology Hypothesis (Sagitov–Dimitriev): A Neurobiological Model of Empathic Transmission of Mental States

1. IntroductionMental states—emotions, stress reactivity, and cognitive sets—can be transmitted between people. This phenomenon is described as emotional contagion, interpersonal physiological synchrony, and “inter-brain coupling” during joint activity. Meta-analyses of hyperscanning confirm alignment of behavioral, autonomic, and neural indices within dyads, including prefrontal–temporo-parietal synchrony during cooperative tasks (fNIRS). In this work, we advance a neural model of mirror psychopathology as a bridge between contagion, physiological synchrony, and clinical phenomena of induced symptomatology. A suitable neurobiological lens is the broader mirror-reflective circuitry: observing others’ actions and emotions recruits partially overlapping zones (inferior frontal gyrus, anterior cingulate cortex, insular cortex). Contemporary accounts emphasize that this is not a single “mirror neuron module,” but a learned visuomotor architecture embedded within social networks and shaped by experience and task demands. Meta-analytic work on pain empathy demonstrates a stable “empathy core” (anterior cingulate and anterior insula) together with contextual modulation depending on stimulus type and observer perspective. This helps explain why some social conditions amplify affective resonance and emotional contagion, whereas others support cognitive distancing and reappraisal. Transmission of states also involves endocrine stress circuits. In laboratory settings, observers exhibit “empathic stress” with cortisol increases; the magnitude is modulated by emotional closeness and observation modality (live vs. video). In everyday life, spousal cortisol synchrony has been described and is linked to interaction quality. Closeness and shared experience thus act as natural amplifiers of interpersonal transmission. On the clinical continuum, an extreme manifestation of interpersonal transmission is shared psychotic disorder (folie à deux), in which a secondary subject adopts the primary individual’s delusional beliefs. Although DSM-5 removed the separate category (reclassifying cases within the psychotic spectrum), the syndrome remains phenomenologically significant; reviews highlight the roles of prolonged isolation, a dominant figure, and the strength of the bond. The focus of this work is to connect three layers: (i) emotional contagion and neural/endocrine synchrony; (ii) the historically described folie à deux; and (iii) the phenomenon of false psychosis in severe OCD (Dimitriev, 2025) as a pseudo-psychotic phenotype sustained by intellectual compulsions and hyper-interpretation. We introduce the concept of reflected false psychosis: in an emotionally coupled dyad, mirror-affective and regulatory mechanisms amplify in the observing partner a content-specific, compulsive re-learning of reality—with fluctuating insight and reducibility via OCD-oriented interventions—without the need to posit a primary psychotic diathesis in the observer. Contribution of this work. We (1) formalize a neural model of Mirror Psychopathology (Sagitov–Dimitriev) that integrates contagion, physiological synchrony, and folie à deux; (2) propose operational criteria and differential markers of reflected false psychosis; (3) articulate testable predictions for dyadic hyperscanning (EEG/fNIRS), EMA with cortisol/HRV, and self/other tasks; and (4) outline a clinical algorithm focused on self–other boundaries and management of co-rumination.