REFERENCE · DIAGNOSTIC TECHNIQUE

Swivel-Chair Assessment

Clinician-focused educational reference; assessment requires appropriate expertise and a safe clinical setting.

Purpose and Suitability
Anatomy and Physiology
Preparation and Safety
Performing the Assessment
Interpreting Findings
Explaining the Result
Evidence and Limitations
Media and Accessibility
Research and Sources

Purpose and Suitability

This optional clinical comparison asks whether leg movement changes substantially when a person propels a wheeled chair while seated, compared with walking. It can contribute to an assessment of suspected functional gait disorder. It is not a test of honesty or a way to decide whether someone deserves a mobility aid. [1][2]

Swivel-chair sign: A marked improvement in observed leg-driven movement during seated chair propulsion compared with walking, interpreted within a full clinical assessment.

Here “chair” means the wheeled swivel chair used in the assessment, not a general inference from someone’s wheelchair use. Do not attempt the comparison when transfers, seated propulsion or walking cannot be assessed safely.

Anatomy and Physiology

Walking involves supporting and moving body weight while controlling balance over alternating legs. Sitting supports the pelvis and changes the load and balance demands. The feet can push against the floor to move a rolling chair without performing the same task as upright walking.

Weight-bearing: Taking body weight through a limb. Propulsion: Producing movement forward by pushing against a surface.

These differences are central to interpretation. Better seated movement may have several explanations, including reduced pain or balance demands. A clinician must judge whether the size and character of the change supports a functional pattern. The comparison does not directly measure brain activity or demonstrate a single cause. [1][2]

Preparation and Safety

Explain both tasks and obtain agreement. Review pain, dizziness, fatigue, injuries, cognition and ability to follow instructions. Check transfer safety, foot contact, footwear, chair stability and a clear level route. Arrange trained guarding and the person’s usual walking assistance; do not let an unsecured chair roll during a transfer.

Stop for pain, dizziness, loss of seated or standing balance, an unsafe transfer or a request to stop. If support or task changes prevent a comparable observation, document that limitation. These are practical clinical safeguards, not a standardized safety protocol validated by the study.

Performing the Assessment

The 2024 study compared a 5–10-metre forward walk, pivot and return with leg-driven movement over 5–10 metres in a wheeled swivel chair with a backrest. [2]

Observe the person’s walking, including the aid and assistance needed.
Help them transfer safely to the prepared chair, if appropriate.
Ask them to propel it with their feet using a walking movement. Observe continuity, leg movement and assistance rather than just distance covered.
Compare the two tasks and record the actual change, symptoms and adaptations.

This is a teaching outline based on that comparison. If distances, support or equipment differ, record the adaptation; do not label the altered procedure an exact replication. Do not repeat unsafe trials to obtain a positive sign.

Interpreting Findings

Supportive: A substantial improvement may add evidence when it fits the wider examination and alternatives have been considered.

Negative: No improvement does not exclude functional gait disorder. Many affected participants in the later study lacked the sign.

Indeterminate: Pain, transfer difficulty, unsuitable equipment, inability to follow the task or competing explanations can prevent a meaningful conclusion. [2]

Confounder: Another influence that changes the result and makes its meaning less clear.

Chair propulsion does not establish safe unsupported walking, endurance or independence. Record each separately. It must not be used to remove a wheelchair, walking aid or personal assistance on the strength of this observation alone. See assessment and everyday function.

Explaining the Result

An editorial example, not a patient or research quotation:

“Your legs moved more freely in this seated task. Sitting changes the demands on your body, so this does not tell us that you can walk safely without help. We need to interpret the change alongside the rest of your examination.”

If it supports the diagnosis, explain why this particular comparison is informative. If it does not, explain what remains uncertain. Ask about transfers, ordinary distances and recovery after activity before making a mobility plan.

Evidence and Limitations

Original study: Okun and colleagues compared nine people with functional gait disorder with nine controls with other gait disorders. Eight of the functional group improved in the chair; controls showed comparable impairment across tasks. This small study cannot establish broad accuracy. The primary abstract was reviewed, not the full text. [1]

Later blinded assessment: Lagrand and colleagues studied 26 functional and 22 other gait disorders; two specialists rated videos blinded to diagnosis. Reported mean sensitivity was 37%, specificity 96%, with inter-rater agreement κ = 0.69. Controls were predominantly people with Parkinson’s disease. Severe contributing pain, severe cognitive impairment and coexisting functional seizures were exclusions. Selected established diagnoses and subjective ratings limit generalizability; small differences require caution. These are chair-sign results, not the separate whack-a-mole results in the same paper. Full text was checked. [2]

Sensitivity: How often a test detects the condition in those classified as having it. Specificity: How often it is negative in the chosen comparison group. κ (kappa): Agreement between raters after allowing for chance agreement.

Targeted update: September 30, 2026. Neither study validates the sign as a measure of everyday fall risk, sustained mobility or support needs.

Media and Accessibility

A teaching diagram can show the two tasks side by side, with the backrest, feet, chair wheels and walking support visible. Its caption should identify the changed load and balance demands. Do not illustrate a rolling chair as a safe substitute for prescribed mobility equipment.

Any patient video requires consent and trained supervision. Show complete task segments and assistance; avoid a “caught walking” narrative. Supply captions, a transcript and a written description of the finding and its limits. No illustration or footage has yet been added.

Research and Sources

The original small comparison and subsequent blinded study are distinct evidence stages. The later study’s exclusions matter when applying its results to a person with pain, cognitive difficulty or other FND symptoms.

Citation	Figure	Full citation
[1]	—	Okun MS, Rodriguez RL, Foote KD, Fernandez HH. The “chair test” to aid in the diagnosis of psychogenic gait disorders. The neurologist. 2007;13(2):87-91. DOI. PMID: 17351529. FND-CIT-0127.
[2]	—	Lagrand TJ, Brusse-Keizer M, Charmley A, et al. A Critical Appraisal of the Whack-a-Mole and Swivel Chair Signs in the Diagnosis of Functional Movement Disorders. Movement disorders clinical practice. 2024;11(1):63-68. DOI. PMID: 38291841. FND-CIT-0181.