Brunnstrom stages of motor recovery
/ BROON-strom /
When the arm or leg comes back after a stroke, it does not simply get stronger in a straight line, the way a muscle does after a few weeks in a cast. It comes back in a recognisable sequence, almost like a film replaying motor development in fast-forward. A Swedish physiotherapist named Signe Brunnstrom watched this sequence carefully and described it as a series of stages — a rough map of where a recovering limb has been and where it might be heading.
There are six stages. Stage 1 is flaccidity: right after the stroke the limb is floppy, with no movement at all. Stage 2 is the first flicker of movement, but it comes locked into crude mass patterns (synergies) and tone begins to rise. Stage 3 is peak spasticity, with movement still trapped in those whole-limb synergy patterns — you cannot move one joint without the others coming along. Stage 4 is the breakthrough: small movements start to escape the synergy, and spasticity begins to ease. Stage 5 brings more independent, isolated joint movement and less spasticity. Stage 6 is near-normal movement with coordination almost restored. Crucially, recovery can stall and stop at any stage; not everyone reaches stage 6.
In rehabilitation the stages are useful as a shared language and a way to track direction — a person moving from stage 3 to stage 4 is genuinely improving, even before they look much stronger. But the model is descriptive, not a guarantee or a fixed timetable, and modern therapy no longer waits passively for synergies to 'release' on their own. Instead it actively trains real tasks. The honest caveat is that the sequence describes a common path, not a promised destination, and where someone plateaus varies enormously.
Six weeks after his stroke a man is at Brunnstrom stage 3: when he tries to lift his arm, the whole limb fires as one stiff package — shoulder up, elbow bent, fist clenched — and he cannot reach forward with the elbow straight. By stage 4 he can finally straighten the elbow while keeping the shoulder down, a small move that opens the door to real reaching.
Recovery tends to move out of whole-limb synergies toward isolated, controllable joint movement.
The stages describe a typical path, not a fixed schedule or a promise that everyone reaches stage 6 — many people plateau partway. Older 'wait for synergies to release' practice has given way to active task training.