23/03/2026
FND Awareness Day - 25th March
FND, the System, and What We Cannot See
Functional Neurological Disorder still sits in the space many systems struggle to hold.
Not because it is rare.
But because it refuses to fit neatly into the boxes we have created.
For too long, we have relied on diagnosis to bring order to complexity.
And yet people do not present in boxes.
They present in layers.
Biology.
Experience.
Adaptation.
Context.
Load.
That is why I do not reserve this way of working for FND alone. My practice is grounded in a biopsychosocial formulation, recognising that symptoms emerge within a wider system shaped by biology, trauma, stress, relationships, health, and context. The NSCF–CTA™ framework then provides a way of mapping that complexity in real time, whether someone has a diagnosis, is presenting with symptoms, or where we are trying to understand vulnerability before conditions such as FND fully emerge.
One of the simplest ways I explain it is this:
Think of the brain as the laptop hardware.
The structure may be intact.
But what determines how the system functions is the operating system the nervous system control centre.
It is constantly scanning, predicting, prioritising, and coordinating what happens next.
And then there is the desktop.
This is where everything the individual is carrying shows up.
Sleep.
Energy.
Hormones.
Stress.
Grief.
Trauma.
Relationships.
Health concerns.
Stimulus input.
Cognitive demand.
Emotional load.
Too many tabs open.
Too many background processes running.
When that happens, the system does not fail.
It adapts.
It slows down.
It limits performance.
It shifts into protective mode.
That is often what I believe we are seeing in FND.
Not a broken system.
A system trying to manage more than it can currently hold.
This is where the Neuro-Somatic Capacity Flexibility — Capacity-Threat-Agency (NSCF–CTA™) framework becomes essential.
Because what matters is not just the label.
It is:
Capacity — what the system can currently hold
Threat — what is consuming and amplifying load
Agency — whether the person still has a sense of control and choice within the system
For me, understanding this was not only professional. It was personal.
When I mapped my own chronology, what emerged was not a single cause, but a pattern of nervous system vulnerability across the lifespan. Looking at it this way, FND did not feel like something that appeared out of nowhere. It felt like the point at which my sensitised system could no longer keep compensating.
This is also why timing in therapeutic work matters.
There are times we intentionally activate elements of the fear network, particularly when working with grief, trauma, and loss.
But if this happens before the system has enough capacity, we do not create processing.
We create overwhelm.
Too much too soon, and the system shuts down.
Too little progression, and we risk reinforcing avoidance.
So the work is not about pushing through.
It is about restoring conditions.
Reducing load.
Supporting regulation.
Gradually rebuilding agency.
Perhaps the shift we are being asked to make is this:
Stop asking, “What is wrong?”
Start asking, “What is this system trying to manage?”
Because in FND, and often long before it fully presents, the system is not broken.
It is miscommunicating.
I’d be interested to hear from others working in this space in how are you conceptualising FND, vulnerability, and system overload beyond diagnosis alone?
-Observations from the chair
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