Functional Neurological Disorder (FND) is a condition that affects how the brain and body communicate with
each other.

In FND, the structure of the brain is normal. There is no damage or disease causing the symptoms. Instead, the difficulty lies in how the brain is functioning — how it sends and receives signals.

A helpful way to understand this is to think of the brain like a computer. The hardware (the physical structure) is working, but the software (the system running it) has developed a problem. This can interrupt or misdirect the messages being sent between the brain and the body.
The symptoms of FND are real. They are not imagined, exaggerated, or under a person’s control.