FND Education Project

REFERENCE · RECOVERY TECHNIQUE

Mirror and Visual Feedback for Functional Tremor

Most likely fit: A brief mirror, live-video view, scale reading or visible target helps the person recognize a useful change in rhythm, alignment or weight distribution and then reproduce it without prolonged symptom watching. [Clinical consensus; direct component evidence is limited]

Not a default: Some people tremor less when they do not watch the affected part. Visual feedback should answer one treatment question, then be faded or removed if it increases checking, visual overload or dissociation.

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What visual feedback is for

A mirror or other display can show one useful feature that may feel hard to judge: whether weight is shared more evenly, whether the shoulder is being held up, whether an intentional rhythm has become slower, or whether the hand completed a task more smoothly than expected. The display is a temporary source of information, not a scorecard.

You may look briefly, practise while looking at the object instead, then check again. If watching the tremor makes you more self-conscious, detached, dizzy or compelled to monitor it, tell the clinician. Turning the mirror away can be the correct decision.

Anatomy in everyday language

The brain combines vision, proprioception (signals from muscles and joints about body position), touch and balance information to estimate movement. A mirror changes the visual information available. For a standing leg tremor, two scales can show pressure under each foot; for an arm tremor, a mirror can show shoulder and forearm position. A helpful response does not prove that vision caused the symptom or locate one damaged brain area.

What practice may look like

  1. Agree on one thing to observe: weight distribution, shoulder position, movement size, rhythm change or task completion.
  2. Position the mirror or display without creating neck strain, glare or a balance hazard.
  3. Record one brief attempt without feedback.
  4. Use the display for a small number of attempts while following one task cue.
  5. Hide or turn away the display and repeat the task.
  6. Keep the method only if the useful change carries over and the total visual/cognitive load remains acceptable.

Do not repeatedly replay videos or compare sides without a clear therapeutic reason. Recording requires consent and a plan for storage or deletion.

A note about lower-limb tremor

For standing tremor, visual feedback may show even loading while a clinician provides the necessary support. Looking down at feet can worsen balance; a forward-facing mirror or scale display may be safer. This is not a home balance test when falls risk is uncertain.

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Do not film or photograph without specific consent. Help with the agreed mirror angle or target, then stop commenting on how the tremor looks. Ask whether the display should be removed. A person can be making meaningful progress even when shaking remains visible.

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Select the feedback question

Define the single variable the display should clarify: tremor amplitude during a paced movement, scapular position, grip and reach path, anterior–posterior loading or left–right weight distribution. Check visual acuity/field, migraine, photophobia, visuospatial impairment, vestibular sensitivity, dissociation and whether direct observation increases self-focused attention.

Anatomy and sensorimotor interpretation

Visual feedback interacts with proprioceptive, somatosensory and vestibular input. Two-scale feedback estimates vertical load rather than full plantar-pressure distribution. A mirror shows an image, not muscle activation. Translate its role: “The display tells us where your weight is; it is not judging your leg,” or “We are checking the size of the deliberate wrist movement, then you will return to the cup.”

Explicit treatment sequence

  1. Establish a no-feedback baseline for the selected task and symptom-related variable.
  2. Position the person and equipment safely. Keep the affected segment and functional target visible only as required.
  3. Give one observation target and one movement cue. Avoid simultaneous multi-joint correction.
  4. Trial a few repetitions and ask about effort, ownership, distress, visual symptoms and task ease.
  5. Compare the whole outcome with baseline. Stop if monitoring outweighs the benefit.
  6. Fade feedback through intermittent checks, partial view or an environmental target.
  7. Confirm carryover without the display and in the meaningful context.

Progression, regression and measures

Regress by increasing distance, reducing visual detail, using a floor or object marker, sitting or removing feedback. Progress by making checks less frequent and transferring control to natural task cues.

Measure the chosen task, alignment or loading variable, support, perceived effort, visual symptoms, dissociation and carryover without feedback. Avoid archiving symptom videos without clinical purpose and consent.

Safety and evidence boundary

Secure mirrors and cables, preserve a safe visual horizon for standing, and stop for visually induced dizziness, migraine, dissociation, distress or worse motor control. Mirror and simple visual feedback appear in specialist consensus examples for functional tremor, but dedicated controlled evidence is lacking. This page is separate from surface-EMG biofeedback, which displays electrical muscle activity. [1]

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Research and Sources

Citation Full citation
[1] Nielsen G, Stone J, Matthews A, et al. Physiotherapy for functional motor disorders: a consensus recommendation. Journal of Neurology, Neurosurgery & Psychiatry. 2015;86(10):1113–1119. FND-CIT-0028. https://doi.org/10.1136/jnnp-2014-309255

Detailed technique page created: September 11, 2026 · Clinical and accessibility review pending

For the Person With FND
For Family, Friends, and Other Supporters
For Clinicians and the Care Team
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