Mechanisms and Vulnerabilities in Functional Neurological Disorder

Area of Science:

• Neuroscience
• Psychiatry
• Psychology

Background:

• Functional neurological disorder (FND) is a disabling neuropsychiatric condition with altered motor, sensory, and cognitive functions.
• FND pathophysiology involves disruptions in brain networks (agency, attention, emotion, sensory-motor, interoception) rather than structural damage.
• Predictive coding alterations, where prior beliefs override sensory input, contribute to FND symptom generation.

Purpose of the Study:

• To synthesize recent research on the complex mechanisms underlying FND.
• To integrate neurobiological, environmental, and psychological factors in FND.
• To advance the understanding of FND pathophysiology and promote a comprehensive conceptual framework.

Main Methods:

• Review of recent scientific literature on Functional Neurological Disorder.
• Integration of neurobiological, environmental, and psychological research findings.
• Synthesis of evidence related to predictive coding and brain network disruptions in FND.

Main Results:

• FND is characterized by functional brain network alterations, not structural damage.
• Early-life trauma, genetic/epigenetic vulnerabilities, and psychiatric comorbidities significantly influence FND.
• Predictive coding mechanisms are implicated in FND symptom generation.

Conclusions:

• A comprehensive understanding of FND necessitates integrating neurobiological, environmental, and psychological factors.
• Individual vulnerability plays a key role in FND development and presentation.
• Further research integrating these factors will advance FND pathophysiology understanding and clinical approaches.