Functional Neurological Disorder Symptoms: Movement, Sensation, and Seizures
Author: Angela Bogdanova · Published: October 12, 2026 · Editorial Policy
Research cluster: Somatic Symptom & Functional Disorders · Written by Artificial Sapiens
Functional neurological disorder (FND) can cause weakness or paralysis, abnormal movements, difficulty walking, altered sensation, seizure-like episodes, speech problems, visual symptoms, and changes in attention or memory. The symptoms are experienced involuntarily and can be profoundly disabling. They may begin abruptly, develop gradually, fluctuate from hour to hour, or persist for months or years. A person can experience more than one type of symptom, and the pattern may change over time. FND is diagnosed through an appropriate neurological assessment that looks for specific positive findings, while also assessing other conditions that might explain or coexist with the symptoms. Aybek and Perez, 2022; Dworetzky and Baslet, 2025.
This guide explains what FND symptoms can feel and look like, which patterns clinicians examine, how functional seizures differ from epileptic seizures, why diagnostic signs matter more than a normal scan alone, and when a symptom needs prompt medical evaluation. It addresses symptoms as the primary question; detailed diagnostic protocols, treatment programs, and subtype-specific care require their own clinical discussion.
What are the symptoms of functional neurological disorder?
The principal symptom groups are altered movement or strength; altered sensation; seizure-like episodes; changes in speech, voice, swallowing, vision, or hearing; and problems with walking, balance, or coordination. Some people experience intermittent unresponsiveness or functional cognitive complaints. Fatigue, pain, dizziness, headache, sleep disturbance, and autonomic sensations may occur alongside these presentations, although those symptoms alone do not establish an FND diagnosis. Dworetzky and Baslet, 2025; Park, 2026.
A functional neurological symptom describes a disturbance in the performance of a neurological function. For example, a leg that becomes weak while walking may show a different degree of strength during another movement that activates the same muscles automatically. The experience of weakness is genuine. The discrepancy between performances, when demonstrated properly during examination, may provide diagnostic information. Functional symptoms are not a demonstration of intentional deception and are not assumed to arise from a single emotional cause.
The symptom list is broad because FND includes several clinical presentations rather than a uniform set of manifestations. A person with isolated functional tremor may have very little in common symptomatically with someone whose predominant difficulty is episodes of impaired responsiveness. The relevant question is therefore which neurological function is affected, what has changed, how the symptom behaves, and what clinical findings support its interpretation.
Movement symptoms: weakness, tremor, jerks, and abnormal postures
Functional limb weakness and episodes of paralysis
Functional weakness may involve one leg, one arm, a hand, a foot, one side of the body, or multiple limbs. A limb can feel heavy, difficult to lift, unreliable, or temporarily unable to move. Some people describe the limb as disconnected from their intention to move. Weakness may create foot dragging, difficulty climbing stairs, trouble gripping objects, falls, or dependence on assistance. Symptoms may fluctuate with the activity and context, and severe weakness can be persistent.
Neurologists look for meaningful differences between voluntary and automatic motor performance. Hoover's sign, for example, examines a pattern of hip extension under different movement conditions. When interpreted correctly, it can support a functional explanation for particular presentations of leg weakness. It is a clinician-administered examination maneuver, not a home diagnostic test, and its usefulness depends on the patient's specific weakness and the broader examination. A systematic review found generally higher specificity than sensitivity for many positive signs, with important variation in study quality and performance. Patwal et al., 2023.
New one-sided weakness, facial droop, new speech difficulty, or sudden loss of vision must be assessed urgently for stroke and other emergencies, even if someone has previously been diagnosed with FND. Prior FND does not establish the cause of a new event. CDC stroke warning signs.
Functional tremor
A functional tremor is an involuntary rhythmic shaking movement that can involve the hands, arms, legs, head, or other body regions. It may vary in speed, amplitude, distribution, and severity. During specialist examination, the tremor may change while the person performs a rhythmic movement with another limb or directs attention to another task. A clinician may test for entrainment, meaning that tremor rhythm shifts toward an externally cued rhythm, or for a reproducible change with distraction. These are potential positive findings when demonstrated and contextualized by an experienced examiner. Maillard et al., 2026.
Tremor caused by Parkinson's disease, essential tremor, medications, metabolic problems, and other neurological conditions may also fluctuate. Variability alone is therefore an insufficient basis for a functional diagnosis. Some individuals have both a functional tremor and another established movement disorder.
Functional jerks, spasms, and dystonia
Functional movement symptoms can include sudden jerks or twitch-like movements, sustained abnormal postures, intermittent spasms, and patterns resembling dystonia. The appearance may be dramatic or subtle, and the movements can interfere with writing, dressing, eating, walking, or sleeping. In some patients, a limb adopts a fixed or painful position. Functional dystonia can be challenging because fixed postures, pain, contractures, and coexisting musculoskeletal problems require careful evaluation and individualized rehabilitation. Maillard et al., 2026; Park, 2026.
A clinician considers the time course, injury or illness preceding onset, examination consistency, relevant neurological signs, medications, and potential alternative diagnoses. The presence of pain or a preceding accident is clinically relevant history, but neither establishes the mechanism by itself.
Functional gait and balance symptoms
Functional gait disorder may appear as difficulty initiating walking, intermittent knee buckling, unusually slow movement, leg dragging, unexpected swaying, walking that changes with the task, or instability that increases in certain environments. Some patients walk more smoothly during an automatic or differently directed movement than during focused examination. Others have substantial disability and need an appropriate mobility assessment.
The clinical interpretation depends on observed patterns, positive examination findings, fall risk, neurological testing when indicated, and the possibility of vestibular, orthopedic, medication-related, or other neurological causes. A gait that looks unusual to an observer is not by itself evidence of FND. The aim is to identify an interpretable pattern and address practical safety without dismissing the person's difficulty. Aybek and Perez, 2022.
Sensory symptoms: numbness, tingling, and altered body sensation
FND can affect the felt experience of touch, temperature, pain, vibration, position, or other sensations. A person may describe complete numbness in part of a limb, patches of reduced sensation, tingling or pins and needles, changing boundaries of numbness, or an unfamiliar feeling that a body region is not responding normally. Sensory changes can occur with or without weakness and movement symptoms.
Clinical examination assesses how sensory symptoms are distributed, how they change across repeated or alternative methods of testing, and whether findings correspond with other neurological evidence. Some functional sensory patterns are less typical of a single peripheral nerve, nerve root, or spinal cord pathway. However, sensory patterns and bedside sensory signs have limited reliability when used alone. A clinician should not conclude that symptoms are functional simply because numbness is widespread, changes location, or cannot immediately be explained by an imaging result. Patwal et al., 2023; Aybek and Perez, 2022.
Numbness and tingling also occur with migraine, nerve compression, peripheral neuropathy, metabolic abnormalities, medication effects, stroke, spinal cord conditions, and other disorders. The need for investigation depends on onset, localization, associated deficits, examination, and clinical history. Sudden new numbness affecting one side of the body warrants emergency evaluation because it can be a stroke sign. CDC.
Changes in vision, hearing, and other special senses
Some FND presentations affect vision, such as altered visual fields, intermittent blurred vision, or marked visual difficulty. Changes in hearing may also be reported. Clinicians working with these symptoms may use specific examination techniques to identify internal inconsistencies, but specialized ophthalmologic, audiologic, and neurological assessment may be necessary. New severe visual loss, eye pain, or other abrupt sensory changes should never be assigned to FND without appropriate medical assessment.
Functional symptoms can coexist with migraine, eye disease, ear disease, and other conditions. Naming a symptom as functional requires a defensible clinical basis; it does not make ordinary medical follow-up unnecessary. Dworetzky and Baslet, 2025.
Functional seizures: shaking, unresponsiveness, and seizure-like episodes
Functional seizures are events that resemble epileptic seizures but arise through a different mechanism. They are also called dissociative seizures and have historically been called psychogenic nonepileptic seizures (PNES). Episodes may involve shaking or other movements, changes in responsiveness, altered awareness, apparent loss of consciousness, or periods when the person cannot respond normally. The episodes are real, involuntary clinical events and may be frightening, exhausting, and disruptive.
Individual functional seizures vary greatly. Some involve large-amplitude movements of the limbs or trunk; some resemble fainting or prolonged unresponsiveness; others are characterized by altered awareness or smaller movements. Observers may notice variation in duration, motor pattern, or responsiveness across events. No single appearance, duration, or online video can reliably establish that an event is functional rather than epileptic. Seizure semiology is interpreted with the clinical history and investigations when indicated. Tolchin et al., 2026, American Academy of Neurology guideline.
How do functional seizures differ from epileptic seizures?
Epileptic seizures are associated with abnormal excessive or synchronous electrical activity in the brain. Functional seizures are diagnosed using a combination of detailed clinical history, characteristic event features, and appropriate testing. When feasible and clinically indicated, recording a typical event with synchronized video-electroencephalography (video-EEG) is important for diagnostic certainty. Video-EEG must be interpreted with the captured event, the EEG recording, and the patient's full presentation. A normal routine EEG taken between events is not proof that episodes are functional. Tolchin et al., 2026.
A person can have both epilepsy and functional seizures. Some people have multiple spell types, and a previous epilepsy diagnosis does not rule out additional functional events. Conversely, a functional seizure diagnosis does not prove that every subsequent episode is functional. Clinicians may need to characterize each distinct event type. The current AAN guideline emphasizes assessment for comorbid epilepsy and psychiatric disorders and careful discussion of indications for antiseizure medications. Patients should never independently discontinue prescribed antiseizure treatment because they read a symptom comparison. American Academy of Neurology, 2026.
What should someone do during a seizure-like episode?
Prioritize physical safety: move dangerous objects away when possible, protect the head from injury, avoid restraining the person, avoid putting anything in the mouth, and observe breathing and responsiveness. Follow the person's individualized emergency plan if one exists. First-time seizure-like episodes, significant injury, breathing difficulty, an episode in water, repeated events without recovery, or prolonged convulsive events require urgent or emergency assessment. An unfamiliar episode deserves medical evaluation even in a person with established functional seizures.
Because epilepsy, syncope, metabolic disturbances, and functional seizures can overlap in outward appearance, a bystander should focus on safety rather than attempting to classify the event. Clinicians can later use witness descriptions or a safely obtained recording to aid assessment. The diagnosis and emergency plan should be established by a healthcare professional, not through experiments performed during an episode.
Speech, voice, swallowing, and communication problems
Functional speech symptoms may include changes in fluency, articulation, vocal quality, pitch, loudness, voice production, or the ability to initiate speech. Some people develop a weak or absent voice or speech that varies in particular speaking tasks. A person may speak more normally while singing, laughing, or performing an automatic utterance, although this is a clinical clue only in its full context.
Swallowing-related presentations can include the subjective sensation of food sticking, difficulty coordinating a swallow, globus sensation, or disrupted swallowing behavior. Clinicians also assess for structural, neurological, and other medical causes, especially when there is weight loss, choking, aspiration risk, or progressively worsening swallowing. The international speech and language therapy consensus supports positive assessment and symptom-focused rehabilitation, while acknowledging that comparative treatment research remains limited. Baker et al., 2021.
Sudden speech problems may indicate stroke, particularly when accompanied by facial droop or weakness. New acute speech impairment therefore requires immediate emergency evaluation. CDC.
Functional cognitive symptoms: attention, memory, and brain fog
Some people with FND report losing the thread of a conversation, difficulty concentrating, memory lapses, slowed thinking, word-finding difficulties, or a persistent feeling of brain fog. Cognitive complaints can be associated with fatigue, sleep disruption, pain, medication effects, anxiety, depression, or other neurological conditions. Functional cognitive disorder is an evolving clinical concept with proposed diagnostic approaches and active research; it should not be portrayed as a universally accepted independent DSM-5-TR diagnosis.
A careful clinician assesses actual cognitive performance, inconsistencies when present, the person's everyday functioning, medication and sleep history, mental-health context, and the possibility of neurodegenerative, inflammatory, metabolic, sleep-related, or other medical explanations. Cognitive symptoms alone do not establish FND, and persistent or progressive cognitive decline requires an appropriately tailored medical assessment. Dworetzky and Baslet, 2025; Park, 2026.
Dizziness, fatigue, pain, and other accompanying symptoms
Dizziness, headaches, widespread pain, fatigue, poor sleep, and difficulties with concentration commonly coexist with functional neurological symptoms. They can become major contributors to disability even when a person's presenting symptom was weakness or seizures. Pain and fatigue are meaningful clinical problems and deserve their own assessment and management. Their presence does not automatically convert a diagnosis of fibromyalgia, migraine, a vestibular condition, or another syndrome into FND.
Some dizziness presentations have distinct diagnostic pathways, including vestibular migraine, orthostatic problems, and persistent postural-perceptual dizziness (PPPD). Autonomic conditions, medication effects, anemia, endocrine disorders, and other medical conditions may also cause fatigue or lightheadedness. Treatment planning is strongest when each important symptom receives appropriate clinical consideration and the team identifies which difficulties are plausibly connected. Park, 2026.
Can FND symptoms come and go?
Yes. Some people have intermittent symptoms lasting minutes or hours; others experience daily fluctuations, relapses, or persistent impairment. A symptom may change with task demands, fatigue, pain, sleep, environment, attention, illness, or other circumstances. Those associations do not by themselves identify a cause, and changes with distraction or automatic movement should not be treated as evidence of conscious control.
A person may have a functional symptom during one examination and show near-normal ability during another. That pattern can be clinically informative when a neurologist identifies a reproducible positive sign. It is also possible for functional and other neurological symptoms to interact, so apparently variable performance must be interpreted in the full clinical context. Aybek and Perez, 2022.
Symptoms may start after an infection, physical illness, accident, migraine, a previous seizure, medical procedure, stressful period, or without an identifiable trigger. A trauma history is neither required to experience FND nor enough to explain an individual's symptoms. Current research considers interacting mechanisms across attention, expectation, agency, motor control, emotion regulation, and brain-network functioning. These models are scientifically relevant but do not provide a proven single cause for every patient. Dworetzky and Baslet, 2025.
How do clinicians recognize FND symptoms?
FND assessment begins with a history that describes the symptom precisely: first onset, progression, episodes, triggers, accompanying changes, injuries, medicines, medical history, functional impairment, and what has already been investigated. Neurological examination then seeks features that positively support the relevant functional presentation and checks for signs of other neurological disease. Tests such as MRI, laboratory studies, electrophysiology, EEG, video-EEG, or other specialist evaluations may be needed according to the clinical situation.
A positive clinical sign is a finding shown on examination that supports a particular diagnosis. Examples include Hoover's sign for selected presentations of functional limb weakness and entrainment or distractibility for selected functional tremors. They have different accuracy profiles and must be obtained and interpreted appropriately. A normal MRI, by itself, is not a positive sign of FND. Patwal et al., 2023; Maillard et al., 2026.
Functional seizures are evaluated through their event patterns and, when appropriate, video-EEG capture of a typical event. Some seizure-like episodes remain diagnostically uncertain after an initial assessment, and a clinician may arrange further monitoring. Different symptom subtypes demand different diagnostic tools; the criteria that support functional tremor cannot simply be applied to sensory loss or seizures. Tolchin et al., 2026.
The American Psychiatric Association's DSM-5-TR terminology note uses functional neurological symptom disorder (conversion disorder). The DSM clinical framework includes altered voluntary motor or sensory function, clinical findings demonstrating incompatibility with recognized neurological or medical conditions, evaluation of alternative explanations, and clinically significant impact or a need for medical evaluation. The WHO's ICD-11 clinical reference uses its own classification framework, including dissociative neurological symptom disorder. Clinical classification is guided by the jurisdiction's system and the patient's specific presentation; terms across DSM and ICD should not be assumed to be exact interchangeable codes.
Why a normal scan does not answer the question
MRI and other tests may be useful for finding or investigating structural disease, but their interpretation depends on the question being asked. Normal imaging neither proves that a symptom is functional nor rules out every neurological illness. Positive signs, appropriate examination, and continuing reassessment when new findings emerge remain important.
FND may coexist with epilepsy, migraine, multiple sclerosis, Parkinson's disease, or another established medical disorder. A clinician may diagnose the functional component while continuing management of a separate condition. The key clinical responsibility is to make an evidence-based attribution for each significant symptom rather than forcing all symptoms into one explanation. Aybek and Perez, 2022; Dworetzky and Baslet, 2025.
What else can resemble FND symptoms?
Many of the symptoms described here occur across neurological and general medical practice. Important differentials include stroke or transient ischemic attack for sudden focal deficits; epilepsy and syncope for episodic changes in awareness; migraine for episodic weakness, sensory changes, or visual symptoms; multiple sclerosis and spinal disorders for particular weakness or sensory patterns; peripheral nerve disease for numbness or weakness; movement disorders for tremor or dystonia; vestibular disorders for dizziness; medication effects, intoxication, metabolic illness, and sleep disorders for selected complaints; and psychiatric symptoms in presentations where they are relevant.
Panic attacks can cause shaking, derealization, breathlessness, and marked bodily sensations, while dissociative experiences may alter awareness. These experiences can overlap with functional symptoms, but a panic attack, dissociative experience, or history of trauma is not a substitute for neurological assessment. See the independently published Panic Attack vs Seizure discussion for the broader anxiety-related differential. Historical expressions such as conversion neurosis belong to a different conceptual period; the Hub's Conversion Neurosis article explains that history without replacing modern neurological classification.
Descriptions such as psychogenic, medically unexplained, conversion, or psychosomatic appear in older literature and some current practice. They vary in meaning and do not automatically tell us whether a person has FND, somatic symptom disorder, illness anxiety disorder, or another diagnosis. A clinical differential is an investigation of plausible explanations, not an accusation about the patient's behavior.
When should someone with possible FND symptoms seek urgent care?
Seek emergency medical assistance for sudden facial droop, unilateral arm or leg weakness, acute language difficulty, sudden visual loss, severe new imbalance, or other signs of stroke. Emergency assessment is also appropriate for first-time or unfamiliar convulsive episodes, sustained difficulty breathing, major injury, severe new confusion, concerning changes in consciousness, or severe rapidly worsening neurological symptoms. Follow local emergency guidance and any individualized emergency care plan. CDC stroke guidance; AAN functional seizure guideline.
Make a prompt clinical appointment for new or progressive sensory loss, repeated spells, new walking difficulty, swallowing problems, persistent worsening weakness, or symptoms that interfere with work, schooling, sleep, or basic daily functioning. Anyone with an existing FND diagnosis should seek reassessment when a symptom is materially different from prior episodes, particularly when it brings new objective deficits or red flags.
A diagnosis of FND and the need for appropriate medical evaluation are fully compatible. Good longitudinal care can both support the functional symptoms already recognized and detect newly developing medical conditions.
How are FND symptoms treated and rehabilitated?
Treatment is matched to the symptom presentation and individualized clinical formulation. A clear explanation of the positive findings used to make the diagnosis is a starting point. People with functional motor problems may be offered physiotherapy emphasizing safe movement, motor retraining, automatic movement patterns, pacing, graded participation, and functional goals. Occupational therapy can help with daily routines and adaptations. Speech and language therapy may address functional communication or swallowing symptoms. For functional seizures, psychologically informed therapies and specialist neurological follow-up may be appropriate; clinicians should also manage confirmed epilepsy or psychiatric comorbidity when present. Dworetzky and Baslet, 2025; Baker et al., 2021; Tolchin et al., 2026.
The evidence base is not uniform across FND types. In the large Physio4FMD randomized trial, specialist physiotherapy for functional motor disorder did not significantly outperform usual neurological physiotherapy on the prespecified physical-function outcome at 12 months, although some secondary outcomes, including patient-reported improvement, favored specialist care. That result supports a measured interpretation: rehabilitation can be helpful, but comparative superiority and long-term outcomes cannot be presumed for every patient. Nielsen et al., 2024.
For functional seizures, the 2026 AAN guideline supports a tailored approach to diagnosis, psychological treatments, associated conditions, medication review, and communication with patients and care partners. The evidence for a specific treatment in functional seizures should not automatically be transferred to functional weakness, sensory symptoms, or every other FND presentation. Tolchin et al., 2026.
People may improve substantially, experience partial recovery, remain symptomatic, or follow a fluctuating course. Prognosis is variable, and research has ongoing limitations in subtype-specific outcomes, validated endpoints, and generalization from specialist clinics to routine care. A 2026 treatment review emphasizes multidisciplinary approaches while identifying heterogeneous outcome measures and limited long-term follow-up as continuing research challenges. Park, 2026.
FND symptoms in children and adolescents
Young people may experience weakness, gait symptoms, functional seizures, sensory changes, speech difficulties, or other symptom combinations. Pediatric assessment considers developmental stage, school attendance, friendships, sport and activity, family routines, recent illnesses, medical differential diagnosis, and the effect of symptoms on participation. Clinicians work with the young person and caregivers to establish a clear explanation, address medical safety, and coordinate gradual return to meaningful daily life. Canadian Paediatric Society, 2024.
Family-centered care helps avoid both excessive investigations unrelated to evolving clinical findings and premature dismissal of new signs. Schools may need a practical plan for symptom episodes, mobility, learning, attendance, and reintegration. Treatment and support should fit the child's developmental capacity and the actual medical and psychosocial circumstances. An FND symptom is never sufficient grounds to accuse a young person of fabrication or intentional avoidance.
Living with changing FND symptoms
A symptom record can help when it describes onset, approximate duration, associated symptoms, injuries, change from usual pattern, effects on functioning, and questions for the clinical team. The record is most useful when it informs clinical decisions rather than turning ordinary bodily monitoring into a constant source of distress. For recurrent episodes, a clinician-developed safety plan can reduce uncertainty about when to seek emergency help and which interventions are appropriate.
People may need individualized accommodations at work, in education, or at home because symptom severity varies. Activity planning can acknowledge fluctuations while supporting participation and rehabilitation goals. Family members and employers benefit from understanding that observable variability is compatible with involuntary symptoms. Ongoing care should address pain, fatigue, sleep, mood, stigma, and other comorbid problems where these affect function.
What current research can and cannot establish
Established clinical knowledge supports the reality of FND symptoms, the value of context-appropriate positive clinical signs, the possibility of coexisting neurological disease, and the need for an individualized diagnostic and treatment plan. Randomized clinical trials, systematic reviews, and recent specialist guidance offer evidence for particular interventions and selected symptom groups. Aybek and Perez, 2022; Patwal et al., 2023.
Scientific questions remain about the causal mechanisms of individual presentations, the role of prior adversity for a particular patient, which treatments work best for which subtype, the long-term course, and how functional sensory and cognitive findings should be standardized. Functional brain-network models are important research directions, but no single scan or biomarker currently provides a stand-alone definitive diagnosis across all FND subtypes. The practical conclusion is to match each assertion to its level of evidence and to preserve continuing neurological oversight as clinically appropriate. Dworetzky and Baslet, 2025; Park, 2026.
Frequently asked questions
What are the most common FND symptoms?
Motor symptoms, including weakness and abnormal movement, and functional seizure-like episodes are prominent clinical presentations. Sensory loss, altered vision or speech, gait difficulties, and cognitive complaints also occur. The mix varies across patients and settings. A symptom list can guide a conversation with a clinician but cannot confirm a diagnosis. Dworetzky and Baslet, 2025.
Can FND cause paralysis?
FND can cause severe functional limb weakness and episodes described clinically as paralysis. Because sudden weakness can also signal a stroke or another urgent condition, first episodes and materially new patterns require prompt medical assessment. A neurologist evaluates the symptom with positive signs and appropriate differential diagnosis.
Are FND seizures the same as epilepsy?
No. Functional seizures and epileptic seizures are distinct event mechanisms, although they can look similar and can occur in the same person. Clinical evaluation may include video-EEG of a typical event. Patients should not change antiseizure medications without guidance from their treating clinician. Tolchin et al., 2026.
Is FND caused by stress or trauma?
Stressors, illness, injury, and trauma may be relevant for some people, and many cases have no identifiable psychological trigger. A trauma history is not an obligatory diagnostic criterion, and the clinical cause of a particular patient's symptoms cannot be inferred from a history alone. Aybek and Perez, 2022.
Can FND symptoms change within the same day?
Yes. Symptoms may fluctuate across tasks and times of day, sometimes markedly. Fluctuation can be clinically relevant but is not a diagnosis by itself. The interpretation depends on the medical history, neurological examination, and other findings.
Does a normal MRI prove that someone has FND?
No. Imaging findings answer specific medical questions. FND diagnosis uses clinical evidence, including appropriate positive findings, and sometimes requires additional tests to assess alternatives or comorbid disease. Patwal et al., 2023.
Can someone have FND and multiple sclerosis or epilepsy?
Yes. FND can coexist with an independent neurological illness. A sound clinical formulation accounts for both conditions when evidence supports them and reassesses new or changing symptoms. Dworetzky and Baslet, 2025.
Do FND symptoms mean someone is pretending?
No. FND involves genuinely experienced, involuntary symptoms. Inconsistency observed during a neurological examination can be diagnostically meaningful without implying deliberate production. Claims of intentional deception require an entirely different kind of evidence and professional assessment.
What can help someone with FND symptoms?
An explanation grounded in the examination, supportive coordinated care, symptom-specific rehabilitation, management of coexisting conditions, an individualized event or fall safety plan when relevant, and follow-up when symptoms change are reasonable starting points. Treatment choice and likely outcomes vary with the presentation and available evidence.
Related Articles
For the historical terminology that sometimes appears in medical records, read Conversion Neurosis: Historical Meaning and Functional Neurological Symptom Disorder. For the differential between seizure-like episodes and anxiety-related experiences, read Panic Attack vs Seizure: Symptoms, Awareness, and Medical Assessment. These published English articles provide adjacent context; the present page owns the general FND symptom overview.
References
American Psychiatric Association. (2022). Functional Neurological Symptom Disorder (Conversion Disorder): DSM-5-TR terminology update. APA official note.
Aybek, S., & Perez, D. L. (2022). Diagnosis and management of functional neurological disorder. BMJ, 376, o64. https://doi.org/10.1136/bmj.o64.
Baker, J., et al. (2021). Management of functional communication, swallowing, cough and related disorders: Consensus recommendations for speech and language therapy. Journal of Neurology, Neurosurgery & Psychiatry, 92, 1112–1125. https://doi.org/10.1136/jnnp-2021-326767.
Canadian Paediatric Society. (2024). Somatic symptom and related disorders: Guidance on assessment and management for paediatric health care providers. Official position statement.
Centers for Disease Control and Prevention. (2024). Signs and symptoms of stroke. CDC clinical and public guidance.
Dworetzky, B. A., & Baslet, G. (2025). Functional neurological disorder: Practical management. Neurotherapeutics, 22(4), e00612. https://doi.org/10.1016/j.neurot.2025.e00612.
Maillard, A., Mhanna, E., Faiz, H., & Garcin, B. (2026). Functional movement disorders: Diagnosis, pathophysiology, and treatment. Current Opinion in Neurology, 39(4), 389–395. https://doi.org/10.1097/WCO.0000000000001504.
Nielsen, G., et al. (2024). Specialist physiotherapy for functional motor disorder in England and Scotland (Physio4FMD): A pragmatic, multicentre, phase 3 randomised controlled trial. The Lancet Neurology, 23, 675–686. https://doi.org/10.1016/S1474-4422(24)00135-2.
Park, J. E. (2026). Treatment of functional neurological disorders. Journal of Clinical Neurology, 22(5), 514–528. https://doi.org/10.3988/jcn.2026.0223.
Patwal, R., et al. (2023). Diagnostic accuracy of clinical signs and investigations for functional weakness, sensory and movement disorders: A systematic review. Journal of Psychosomatic Research, 168, 111196. https://doi.org/10.1016/j.jpsychores.2023.111196.
Tolchin, B., et al. (2026). Management of functional seizures practice guideline executive summary: Report of the AAN Guidelines Subcommittee. Neurology, 106(1), e214466. Published online December 10, 2025. https://doi.org/10.1212/WNL.0000000000214466.
World Health Organization. (2024). Clinical descriptions and diagnostic requirements for ICD-11 mental, behavioural and neurodevelopmental disorders. WHO official publication.