Submitted:
26 August 2025
Posted:
27 August 2025
You are already at the latest version
Abstract
This article employs a holistic, mechanistic model explaining how early life adversity (ELA) leads to increased suicide risk. It maps the internalization and introjection processes from psychoanalytic object relations theory with circuits involving the amygdala, hippocampus, and medial prefrontal cortex ( mPFC ) within the framework of memory engrams and system consolidation. The model emphasizes neuroplastic and epigenetic reprogramming mediated by the serotonergic apparatus (specifically 5-HT1A and 5-HT2A receptors) and the HPA axis as the biological foundation. Using a dual-aspect monism approach and theoretical integration based on Gundersen’s six criteria, it suggests that ELAs strengthen negative internal objects through norepinephrine-glucocorticoid-mediated synaptic traces, site-specific DNA methylation, PFC regulatory attenuation, and amygdala hyperreactivity. These changes disrupt social homeostasis, lead to the generalization of autobiographical memory, affect pain processing, and increase feelings of loneliness, which contribute to the schemas of “Thwarted Belongingness” and “Perceived Burdensomeness” in Joiner’s interpersonal theory of suicide. Over time, repeated stress raises allostatic load, resulting in permanent set-point shifts and an increased capacity for “deliberate/lethal” behaviors. This comprehensive framework supports a shift from descriptive to mechanistic psychiatry, offering a theoretical and practical guide to understanding the neurobiological development of suicide.
Keywords:
Introduction
Internalization and Its Neurobiology
Consistency
Supervenience
Mechanistic Overlaps
Interdisciplinary Confirmation
Domain Overlap
Conceptual Refinement
Molecular Encoding of Early Life Adversity
From Early Adversity to Allostatic Overload: Progressive Systems Dysregulation
5HT1A
5HT2A
Future Directions and Research Priorities
Combined Therapy Protocols
Prevention and Early Intervention
Mechanism-Based Management
Long-Term Outcomes and Relapse Prevention
Ethical Considerations and Safety
Conclusion: Toward a Mechanism-Based Psychiatry
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