Brunnstrom stages of stroke recovery: motor synergy evaluation, clinical timeline, and neuro-rehabilitation
In short
Following a cerebrovascular accident, motor recovery often follows a stereotypical developmental sequence characterized by flaccidity, obligatory mass synergies, peak spasticity, and gradual emergence of voluntary isolated joint control. Learn how physiotherapists evaluate the 6 Brunnstrom stages and structure targeted rehabilitation.
In this guide (6 sections)
The neurophysiological basis of post-stroke motor synergies
Swedish physiotherapist Signe Brunnstrom observed that following acute cortical stroke, damaged higher motor centers lose descending inhibitory control over primitive subcortical reflex circuits. This loss of supraspinal modulation allows archaic motor synergies (stereotypical, involuntary gross movement patterns coupling multiple joints) to emerge during attempted voluntary movement.
Rather than treating these mass synergies as unwanted pathologies to be suppressed, the Brunnstrom approach views synergies as an unavoidable, natural transitional phase of neurological recovery. Rehabilitation utilizes synergies in early stages to re-establish active muscular firing before progressively breaking the patterns to regain selective, isolated joint control.
The 6 Brunnstrom Stages of Motor Recovery
Motor recovery in the hemiplegic upper and lower limb follows a six-stage hierarchy from acute flaccidity to normal coordination.
| Stage | Muscle Tone & Spasticity | Voluntary Movement Capabilities | Clinical Physiotherapy Priority | |
|---|---|---|---|---|
| Stage 1 (Flaccidity) | Complete flaccidity. Zero resistance to passive stretch (hypotonia). Absent deep tendon reflexes. | Zero voluntary movement on the hemiplegic side. Arm or leg hangs limp. | Prevent shoulder subluxation, maintain passive range of motion, positioning to prevent contractures, sensory stimulation. | |
| Stage 2 (Synergies Emerge) | Minimal spasticity begins to develop, primarily in flexor muscles of the arm and extensor muscles of the leg. | Basic limb synergies appear as weak involuntary associative reactions or minimal voluntary movement. | Facilitate active motor recruitment using overflow reflexes (Raimiste phenomenon) and tapping over muscle bellies. | |
| Stage 3 (Peak Spasticity) | Severe spasticity. High resistance to passive stretch across elbow flexors, wrist flexors, and ankle plantarflexors. | Voluntary movement occurs strictly within the obligatory mass synergy. Patient cannot isolate individual joint motions. | Active-assisted exercises within synergy, followed immediately by sustained stretching to modulate hypertonia. | |
| Stage 4 (Synergy Deviation) | Spasticity begins to decline. Resistance to passive stretch is noticeable only during rapid movement. | Movement combinations deviating from the basic synergy patterns become possible (e.g. placing hand behind small of back, pronation with flexed elbow). | Task-specific reaching drills, dissociating shoulder movement from elbow flexion, active pronation and supination. | |
| Stage 5 (Synergy Independence) | Spasticity diminishes further, present only under physical exhaustion or emotional stress. | More difficult movement combinations outside of synergy become mastered (e.g. raising arm overhead with elbow extended, supination with extended elbow). | Fine motor hand coordination, reciprocal lower limb gait drills without extensor thrust, dynamic balance challenges. | |
| Stage 6 (Normal Coordination) | Individual joint movement is completely free. Spasticity is virtually absent. | Full isolated voluntary joint control. Coordination and movement speed approach the unaffected contralateral side. | High-level agility, sports-specific tasks, fine dexterity tasks (buttoning, typing), and rapid alternating movements. |
Recovery does not always advance to Stage 6. Many stroke survivors plateau at Stage 3 or Stage 4, maintaining functional walking capacity with an AFO while retaining an obligatory flexion synergy in the upper limb. Targeted task-oriented therapy can continue driving motor gains even years post-stroke.
Upper Limb Flexion Synergy vs Lower Limb Extension Synergy
In hemiplegia, the two most powerful obligatory mass patterns are the upper extremity flexion synergy and the lower extremity extension synergy.
| Joint | Upper Extremity Flexion Synergy | Lower Extremity Extension Synergy | |
|---|---|---|---|
| Scapula / Pelvis | Scapular retraction, elevation, and downward rotation. | Pelvic elevation and posterior retraction (hip hiking). | |
| Shoulder / Hip | Shoulder abduction past 90 degrees and external rotation. | Hip extension, internal rotation, and adduction (scissoring posture). | |
| Elbow / Knee | Elbow flexion to acute angle (strongest component). | Knee extension with hyperextension tendency (genu recurvatum). | |
| Forearm / Ankle | Forearm supination. | Ankle plantarflexion and subtalar inversion (equinovarus posture). | |
| Wrist / Toes | Wrist and finger flexion into a tight fist. | Toe plantarflexion and clawing. |
Evidence-based neuro-rehabilitation interventions
Contemporary physiotherapy combines Brunnstrom principles with neuroplasticity concepts to transition patients past synergy confinement.
- Task-Specific Constraint-Induced Movement Therapy (CIMT): For patients who reach Stage 4 or 5, restricting the unaffected hand with a mitt forces intensive repetitive use of the hemiplegic limb during everyday functional grasping tasks.
- Mirror Therapy for Motor Cortex Activation: Placing a vertical mirror between the arms while moving the unaffected limb creates visual feedback in the brain, activating mirror neurons in the damaged hemisphere and reducing Stage 1 to 3 neglect.
- Functional Electrical Stimulation (FES): Applying neuromuscular electrical stimulation over the wrist extensors and anterior tibialis assists motor unit recruitment and provides sensory feedback during reaching and swing-phase gait.
- Raimiste Phenomenon and Associated Reactions: In Stage 2, applying manual resistance to hip abduction on the unaffected limb automatically provokes associative abduction on the paralyzed limb, jumpstarting voluntary motor pathways.
Frequently asked clinical questions
Can a patient skip Brunnstrom stages during stroke recovery?
Patients with mild ischemic strokes or transient neurological deficits may progress so rapidly that early synergy stages appear brief or undetectable. However, for moderate to severe strokes, recovery almost universally follows the step-by-step neurodevelopmental hierarchy.
Why does spasticity get worse before it gets better after a stroke?
As damaged cortical pathways begin regenerating, uncoordinated neural signals reach the spinal cord without normal inhibitory control, causing reflex hyper-excitability (spasticity) to peak at Stage 3. As higher cortical inhibitory control is gradually re-established in Stages 4 and 5, spasticity naturally subsides.
Evidence sources and clinical references
- Physiotherapy Journal: The Brunnstrom Approach to Stroke Rehabilitation: https://academic.oup.com/ptj
- Stroke (American Heart Association): Guidelines for Adult Stroke Rehabilitation and Recovery: https://ahajournals.org/journal/str
- Indian Association of Physiotherapists: Clinical Standards for Neuro-Rehabilitation: https://physiotherapyindia.org
Related condition guides
Related recovery guides & articles
BookPhysio.in Editorial Team
The BookPhysio.in editorial team writes and maintains this content, checking it against reliable clinical sources. Content follows our medical review policy: general information only, and no page claims a clinical review until a named registered physiotherapist has signed it off.
Read our medical review policy