Biopsychosocial Experiences Associated with FND

“Biopsychosocial Experiences” is a project navigation label, not a formal diagnosis, recognized FND subtype or established medical classification.

In this collection, biopsychosocial describes the different domains that may be relevant to a person’s experience. It does not mean that psychological or social factors caused the person’s FND, and it does not mean that every domain is important for every person. [1][2][3]

[!IMPORTANT] These pages are not a checklist for diagnosing FND. An associated experience may have several possible causes, including another neurological or medical condition, pain, migraine, sleep loss, medication or substance effects, a psychiatric condition, environmental demands or ordinary reactions to chronic illness. New or substantially changed problems still need appropriate assessment.

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For the Person With FND
For Family, Friends, and Other Supporters
For Clinicians and the Care Team
Research and Sources —

For the Person With FND

Why this collection exists

Some difficulties do not fit neatly into a symptom list.

For example, a person may have trouble regulating a strong emotional response, become overwhelmed by several demands at once, feel unusually alert or easily startled, or find that pain, poor sleep, noise, light and social demands all reduce what they can manage at that moment.

Those experiences may matter greatly in daily life even when they are not part of the positive neurological signs used to diagnose FND.

Current focused page

• Emotional Regulation, Irritability, and Overwhelm — what emotional flooding or a lower threshold for irritability can feel like, what FND research can and cannot say about it, other possible contributors, and practical ways to reduce harm without turning emotion into a universal explanation for FND.

Related experiences already covered elsewhere

Some cross-cutting experiences already have stronger homes elsewhere on the site:

• Dissociation and Altered Awareness — feeling detached, unreal, foggy or less responsive.
• Available Capacity, Spoons, and Early Action — how physical, cognitive, sensory, emotional and social demands can narrow what is manageable at a particular time.
• Autonomic Symptoms Alongside FND — palpitations, sweating, light-headedness and other automatic bodily responses that need individual assessment.
• Arousal and Startle Regulation — a symptom-specific page for functional jerks when startle or high alertness is part of the individual’s pattern.
• Functional Sensory Symptoms and the sensory-symptom course material — numbness, altered sensation and hypersensitivity.
• Common Co-occurring Conditions — migraine, pain, fatigue, sleep problems, autonomic symptoms and other conditions that may strongly affect day-to-day capacity.
• Relationships, Identity, and Grief — grief, changing roles and identity, social isolation, relationships, intimacy, boundaries and supporter wellbeing.

Keeping these topics connected but not collapsed into one diagnosis helps preserve an important principle: more than one process can be real at the same time.

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For the Person With FND
For Family, Friends, and Other Supporters
For Clinicians and the Care Team
Research and Sources —

For Family, Friends, and Other Supporters

An associated experience may help explain why a situation became harder without explaining everything about the person.

Try to describe what you actually observe. For example, “You seem to have less room for another conversation right now” is usually more useful than deciding that the person is “stressed,” “angry because of FND,” or “overreacting.”

Support can include reducing competing demands, allowing time to recover, following an agreed safety plan and returning to a difficult conversation later. Support should preserve the person’s choice and dignity rather than turning ordinary emotions or behaviour into constant symptom monitoring.

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For the Person With FND
For Family, Friends, and Other Supporters
For Clinicians and the Care Team
Research and Sources —

For Clinicians and the Care Team

Keep the positive neurological basis of the FND diagnosis separate from a biopsychosocial formulation.

Associated experiences may be useful treatment targets or contributors to disability, but they should not be used retrospectively as proof of FND causation. Clarify whether a factor is being considered as a comorbidity, maintaining influence, treatment target, differential diagnosis, environmental demand or ordinary consequence of chronic illness. [1][2][3]

Where a cross-cutting experience is severe or new, review relevant neurological, medical, sleep, medication, substance and psychiatric contributors proportionately. A useful formulation can contain uncertainty and more than one explanation.

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For the Person With FND
For Family, Friends, and Other Supporters
For Clinicians and the Care Team
Research and Sources —

Research and Sources

The evidence supports studying emotional processing, interoception, attention, salience and other cross-cutting processes in FND. It does not establish one biopsychosocial pattern that applies to every person or one associated experience that can diagnose FND. [1][2][3]

Citation	Full citation
[1]	Pick S, Goldstein LH, Perez DL, Nicholson TR. Emotional processing in functional neurological disorder: a review, biopsychosocial model and research agenda. Journal of Neurology, Neurosurgery & Psychiatry. 2019;90(6):704–711. FND-CIT-0005. https://doi.org/10.1136/jnnp-2018-319201
[2]	Hallett M, Aybek S, Dworetzky BA, McWhirter L, Staab JP, Stone J. Functional neurological disorder: new subtypes and shared mechanisms. The Lancet Neurology. 2022;21(6):537–550. FND-CIT-0003. https://doi.org/10.1016/S1474-4422(21)00422-1
[3]	Drane DL, Fani N, Hallett M, Khalsa SS, Perez DL, Roberts NA. A framework for understanding the pathophysiology of functional neurological disorder. CNS Spectrums. 2021;26(6):555–561. FND-CIT-0006. https://doi.org/10.1017/S1092852920001789

Collection created: October 2, 2026 · Clinical, lived-experience and accessibility review pending