FND Education Project

REFERENCE · RECOVERY TECHNIQUE

Mirror and Visual Feedback for Functional Limb Weakness

Most likely fit: Brief, selected visual feedback helps the person find alignment, weight transfer or a smoother task, and does not intensify symptom checking, visual sensitivity or dissociation. [Clinical consensus; direct evidence for this component is limited]

Not a default: Some people move better when they do not watch the weak limb. A mirror should be trialled, measured and removed when it is unhelpful.

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What visual feedback is for

A mirror, live video or visible target can show where the whole body is in space. It may help you see that your pelvis has moved over the supporting foot, that the shoulder is not being held up, or that the hand completed a task more smoothly than it felt. The purpose is to support one action—not to stare at the limb and look for evidence of failure.

Anatomy in everyday language

The brain combines vision, proprioception (information from muscles and joints about body position) and touch to estimate where the body is and what it is doing. Visual feedback changes one part of that information. It does not prove that the symptom is caused by eyesight, nor does a response identify one damaged brain area.

What practice may look like

The clinician chooses what should be visible and what task should be completed. You might watch your belt line stay level during a small weight shift, see the hand place an object, or use a floor line rather than look directly at the limb. Feedback may be shown briefly, hidden during practice and checked again afterward.

Tell the clinician if the mirror makes you feel detached, visually overwhelmed, more self-conscious or more compelled to inspect the symptom. Turning the mirror away can be the correct treatment decision.

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Do not record or show video without consent. Avoid directing the person to compare sides repeatedly or commenting on whether movement “looks normal.” Help set up the agreed angle and task, then keep feedback brief. If visual attention worsens movement or distress, use the alternative cue from the plan.

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For Clinicians and the Care Team

Select the feedback question

Define the single movement variable the visual display should clarify: pelvic translation, trunk position, knee alignment, reach path, grasp-release or task completion. Check visual acuity and field, migraine or photophobia, visuospatial disorder, neglect, body-perception disturbance, dissociation and whether direct observation increases internal monitoring.

Anatomy and sensorimotor interpretation

Visual feedback interacts with proprioceptive, vestibular and somatosensory information. It may improve error recognition or provide an external task focus, but it can also amplify conscious control. Do not claim that a positive response proves a specific sensory-integration mechanism. Translate the goal: “The mirror is showing where your pelvis is over your foot; it is not grading your leg.”

Explicit treatment sequence

  1. Record baseline performance without the mirror.
  2. Position the mirror or camera so the relevant whole movement is visible without requiring neck strain or unsafe visual fixation.
  3. Give one external task cue and one observation target. Avoid multiple corrections and side-by-side scrutiny unless comparison has a clear purpose.
  4. Trial a small number of repetitions. Ask about movement ease, ownership, distress, dizziness and visual load as well as observing performance.
  5. Compare with baseline. Continue only if the net effect is useful.
  6. Fade the display: intermittent checks, a smaller environmental target, then performance without feedback. Generalize to the meaningful task.

This page concerns ordinary visual feedback, not a mirror-box illusion protocol. If a different mirror method is used, name and justify it separately.

Regression, progression and measures

Regress by increasing distance from the mirror, reducing visual detail, covering part of the view, switching to a floor marker or removing visual feedback. Progress by reducing frequency of feedback and transferring the movement to natural environmental cues.

Measure the selected alignment or task outcome, assistance, movement continuity, perceived effort, visual symptoms, dissociation and carryover without the mirror.

Safety and evidence boundary

Secure large mirrors and keep gaze demands compatible with balance. Stop for visually induced dizziness, migraine escalation, dissociation, distress or worse motor control. Mirror feedback is included in specialist consensus, but direct functional-weakness evidence is limited and community responses can differ. [1][2]

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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
[2] Nielsen G, Stone J, Lee TC, et al. Specialist physiotherapy for functional motor disorder in England and Scotland (Physio4FMD). The Lancet Neurology. 2024;23(7):675–686. FND-CIT-0029. https://doi.org/10.1016/S1474-4422(24)00135-2

Detailed technique page created: September 10, 2026 · Clinical and accessibility review pending

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