Track Functional Neurological Disorder (FND) and Show the Pattern Behind It

What to track when you have FND

FND affects how the nervous system sends and processes signals, not its structure, which is why the symptoms are entirely real even though scans, EEGs and blood tests usually come back normal. The aim is not to log everything, it is enough signal to show your care team the pattern behind your diagnosis.

• Muscle Weakness is often the sign that first brings FND to a neurologist's attention. It is diagnosed on positive findings such as Hoover's sign (weakness of hip extension that returns to normal strength when the opposite leg pushes down against resistance), not by ruling out every other possibility first. Logging which limb is affected, how it varies through the day, and whether it is constant or comes in episodes, gives your team a pattern no single appointment can show.
• Shakiness / Tremor in FND typically changes in frequency, or briefly stops, when your attention is pulled elsewhere, and it often entrains to a rhythm you are asked to tap with your other hand, both recognized positive signs rather than evidence the tremor is being produced on purpose. Recording when it starts, how long it lasts and what you were doing beforehand helps show that variability over weeks instead of the few minutes a clinic visit allows.
• Balance / Unsteadiness and functional gait problems often look different from one walk to the next, worsening when you concentrate on your feet and easing when you are distracted, the opposite of most structural gait disorders. A dated log of falls, near falls and the situations that bring on unsteadiness is useful evidence for a physiotherapy assessment.
• Dissociation covers both the detached, unreal feeling some people describe between episodes and functional (dissociative) seizures themselves. Logging frequency, duration and what preceded each episode is one of the most clinically useful records you can bring to a neurologist, because it is the pattern, not any single episode, that supports the diagnosis and guides treatment.
• Numbness / Tingling in FND often spreads in a way that does not match a single nerve or spinal segment, for example covering an entire limb or one side of the body. That distribution is itself a useful clinical detail, and tracking where it occurs and how long it lasts adds to the picture over time.
• Speech Difficulty, including a stutter that appears suddenly, a whispering voice (functional dysphonia), or trouble finding words, can fluctuate independently of your other symptoms. Logging it separately shows whether it tracks with fatigue, stress or a flare of other symptoms, or comes and goes on its own.
• Vision Changes such as blurring, double vision or patches of visual loss can occur in FND without a matching lesion on imaging or eye examination. That normal scan is expected and does not mean the symptom is not real. A log of when vision changes happen and how long they last helps decide whether separate ophthalmology review is worth pursuing.
• Fatigue is close to universal in FND and overlaps heavily with ME/CFS, so logging it daily at mild, moderate or severe gives you a baseline to compare against your motor and sensory symptoms.
• Brain Fog, meaning slowed thinking, word finding trouble or difficulty concentrating, frequently travels with the fatigue and can be worsened by the effort of managing other FND symptoms in public. Tracking it separately shows whether it is its own pattern or rises and falls with your motor symptoms.
• Muscle Spasm includes functional dystonia, where a limb or the face holds a fixed abnormal posture, and can be triggered by a minor injury or start without an obvious cause. Recording the trigger, if there was one, and how the posture resolved is useful detail for a movement disorder specialist.
• Reduced Daily Function is the measure that matters most to clinicians and benefits assessors, capturing what you actually could not do (walk unaided, work a full day, drive) rather than how you felt. It is often the single most persuasive line in a report.

Pacing, physiotherapy and the factors that move your symptoms

Tracking triggers and symptom easing factors is not incidental in FND, it is a named part of the physiotherapy and CBT based treatments with the best evidence behind them, and the following factors are the ones most programs ask you to watch.

• Physical Therapy for FND uses a specific movement retraining approach (automatic movement, distraction techniques, and gradually rebuilding normal movement patterns), and most programs ask you to log sessions and what you practiced between them. A dated record of what improved and what did not is often more useful to your physiotherapist than a verbal recap at the next appointment.
• Rest & Pacing is central to FND management in much the same way it is for ME/CFS and long COVID, because pushing through fatigue or forcing a symptom to perform on demand can extend a flare. Logging planned rest alongside your symptoms shows whether pacing is actually reducing your episode frequency.
• Cognitive Effort, things like a demanding conversation, a form, or a stretch of concentrated work, can trigger or worsen functional symptoms as reliably as physical exertion, and people often miss the connection because they were sitting still at the time.
• Physical Activity logged honestly, not aspirationally, lets you see whether a walk, a workout or standing for a long period precedes your weakness, tremor or unsteadiness, exactly the kind of trigger pattern FND physiotherapy asks you to identify.
• Stress is one of the best documented triggers for FND flares, and logging it does not mean the disorder is psychological in a dismissive sense, it means you can show your team the actual relationship between stress and symptoms rather than leaving it assumed. CBT for FND works directly with this link.
• Poor Sleep compounds fatigue and brain fog and can lower your threshold for a flare the next day. Tracking it alongside your motor and sensory symptoms shows whether a bad night is a reliable early warning sign for you.
• Meditation and other grounding or relaxation techniques are commonly taught alongside FND physiotherapy to interrupt the cycle between dissociation and symptoms. Logging when you use them and what followed shows whether they are earning their place in your routine.
• Daily Medications for FND often target overlapping conditions rather than FND directly, for example amitriptyline or duloxetine for pain, an SSRI for anxiety that is fueling flares, or medications for POTS or migraine. Dated logs show whether a change coincided with fewer or shorter episodes.

Understanding the diagnosis: why scans are normal, and how functional seizures differ from epileptic ones

For decades FND was treated as a diagnosis of exclusion, something you arrived at only after every scan, blood test and EEG came back clear, which is part of why so many people were told their symptoms were imagined or exaggerated. That approach is now considered outdated. FND is a positive diagnosis, made on findings a clinician can see and test for directly: Hoover's sign, where weakness in hip extension disappears when the opposite leg pushes down against resistance, the tremor entrainment test, where a functional tremor takes on the rhythm of a movement you are asked to copy with another limb, and gait that changes shape with distraction in a way a structural problem does not. The underlying issue is how the nervous system is functioning, the signals it sends and how it processes them, rather than any visible damage to it, which is exactly why the scans are normal and the symptoms are, at the same time, completely real and often disabling.

Functional (dissociative) seizures are frequently confused with epilepsy, but they differ in ways a video EEG unit can usually confirm: no epileptiform activity accompanies the event, the eyes are commonly closed rather than open, movements often wax and wane or move asymmetrically between limbs rather than following the stereotyped pattern of a generalized epileptic seizure, and episodes can last considerably longer. None of that means the seizures are put on. They are involuntary, distressing, and can be dangerous depending on where they happen, and they deserve the same practical planning as any seizure disorder. FND also overlaps heavily with ME/CFS, POTS and long COVID, all of which involve the autonomic nervous system, and with joint hypermobility, which changes how the body sends signals about its own position in the first place. If you already track one of those conditions, most of the same fatigue and brain fog entries carry over.

Preparing for a neurologist, physiotherapist or FND clinic appointment

Whether you are seeing a general neurologist, a specialist FND clinic, a physiotherapist trained in this condition, or a psychologist for CBT, the questions asked are fairly consistent: when did this start, is there a clear trigger or does it come out of nowhere, how has it changed over time, what have you tried already, and how much of your daily life does it affect. Those are answers you have already recorded rather than answers you have to reconstruct under pressure, which matters when brain fog or the stress of the appointment itself makes recall harder.

A doctor-ready PDF from Trace Health turns weeks or months of entries into a chart: symptom frequency and severity over time, the physical therapy sessions and pacing you have logged alongside them, and any medication changes lined up against your symptom trend. For a diagnosis that has so often been met with skepticism, walking in with dated evidence changes the tone of the conversation, from having to convince someone you are unwell to discussing what to do next. It also means you do not have to narrate your whole history from memory, which is itself a demanding task on a day when concentration may already be limited.

Frequently asked questions

Is FND a real diagnosis, or does it mean my symptoms are imagined?

FND is a real, positive diagnosis, not a label attached when tests come back clear and nothing else fits. Clinicians diagnose it from findings they can see directly, such as Hoover's sign, the tremor entrainment test, or gait that changes shape with distraction, the same way many other neurological diagnoses are made from a specific set of signs. The condition reflects a problem in how your nervous system is functioning, the signals it sends and how they are processed, rather than damage to its structure, which is exactly why brain scans, EEGs and blood tests are usually normal. Normal results do not mean nothing is wrong. Your weakness, tremor, dissociative episodes and other symptoms are involuntary and are not something you are producing on purpose or could stop by trying harder. Discuss the specifics of your diagnosis and its basis with your neurologist.

How is a functional (dissociative) seizure different from an epileptic one?

Both are real, involuntary events, but they arise differently, and a video EEG unit can usually tell them apart. During a functional or dissociative seizure, the EEG does not show the epileptiform activity seen in epilepsy, the eyes are commonly closed rather than open, movements often wax and wane or move asymmetrically between limbs rather than following the stereotyped course of a generalized epileptic seizure, and episodes can run considerably longer than a typical epileptic one. Neither pattern means the seizure was put on or is under conscious control. Logging dissociation and seizure episodes, including how long each one lasted, what happened just before it, and how you felt afterward, gives your neurologist the pattern that supports the diagnosis and helps separate FND from epilepsy, or from having both conditions together, which does happen.

How does tracking actually help with FND physiotherapy or CBT?

Symptom and trigger tracking is a named part of the treatments with the best evidence for FND. FND physiotherapy works by retraining automatic movement patterns and using distraction techniques, and your physiotherapist needs to know which situations reliably bring on your weakness, unsteadiness or tremor so they can target sessions around them. CBT for FND works with the link between stress and symptom flares, and a dated log is what turns the idea that stress makes it worse into a specific, checkable pattern you and your therapist can act on. In Trace Health, logging physical therapy sessions and pacing on the same timeline as your symptoms means you and your care team can see, session by session, whether a technique is actually reducing frequency or severity, rather than relying on how the last few days happened to feel.

How many weeks of logging before a pattern shows up?

Give it six to eight weeks before you expect to see a reliable pattern, because FND symptoms can vary a great deal day to day and you need several episodes to compare rather than one or two. Three months is usually enough to show your care team which stress, poor sleep or cognitive effort patterns line up with flares, and whether physical therapy or pacing changes are shifting your frequency or severity. If some days you cannot manage a detailed entry, a single severity tap for your main symptom is still useful and keeps the record continuous, which matters more than any single day being complete. Missed days are normal and do not undermine months of consistent logging.

Can I hand my doctor or physiotherapist the record instead of explaining everything from scratch?

Yes. Trace Health exports a doctor-ready PDF with dated symptom entries, severity levels, and the lifestyle factors you have logged alongside them, laid out as charts over weeks or months. You can hand it over in the waiting room or email it ahead of the appointment. For FND specifically, the most useful pages are usually your seizure or episode frequency, the pattern behind your weakness or unsteadiness, and your physical therapy log against symptom severity. Your data stays on your iPhone by default, with optional private iCloud sync to your own account, there is no Trace Health account, and nothing is uploaded anywhere for analysis, so you decide exactly what leaves your phone and when. Discuss what the record shows with your clinician rather than treating it as a diagnosis in itself.