In persistent pain, changes occur in how the brain maps the affected body part. That map can become blurred or distorted, and movement itself can become associated with threat — even when tissue has healed.
Graded motor imagery (GMI) is a structured, progressive program that works on this representation before asking for movement. It has the strongest evidence in complex regional pain syndrome (CRPS) and phantom limb pain, with some application to other persistent pain states.
The three stages
1. Left/right discrimination
You're shown images of hands or feet and asked to identify quickly whether each is left or right. People with persistent pain are often slower and less accurate for the affected side — a sign the cortical map has degraded.
Practised repeatedly, accuracy and speed improve. This stage alone can begin to sharpen the representation.
2. Explicit motor imagery
You imagine moving the affected limb into various positions without actually moving it. Imagined movement activates much of the same cortical machinery as real movement — but without the sensory input that might provoke a pain response.
3. Mirror therapy
The unaffected limb is moved in front of a mirror positioned so the reflection appears where the affected limb would be. The brain receives visual feedback of normal, painless movement on the affected side.
Why the order matters
Progressing too quickly can flare symptoms. Each stage is only advanced once the previous one is comfortable, which is the "graded" part. Rushing to mirror therapy in a highly sensitized person often backfires.
Being straight about the evidence
GMI has reasonable support in CRPS and phantom limb pain. Evidence in other chronic pain conditions is more limited and less consistent, and it is not a standalone cure. It's one component within a broader approach that also includes pain education, graded activity, and addressing the physical contributors.
Who it might suit
- People with CRPS
- Phantom limb pain following amputation
- Some persistent pain states where movement itself has become strongly threatening
- Cases where even light movement or touch provokes disproportionate pain
If you're dealing with persistent pain that hasn't responded to conventional approaches, an assessment can help identify whether central sensitization is a significant factor — and what combination of approaches makes sense.