Articulated AFO
Draft — clinical review requiredAn AFO with an ankle joint that allows some motion while blocking or limiting other motion.
Foot clearance
Toes may catch in swing when the ankle cannot dorsiflex.
Mechanism: The orthosis resists plantarflexion during swing.Ankle position at contact
Flat or toes-first contact is possible.
Mechanism: A plantarflexion stop prevents the foot from dropping.Tibial progression
Tibia advances freely or is limited by tone.
Mechanism: Stiffness and alignment determine how much the tibia can move over the foot.Knee behaviour
Depends on ankle and muscle control.
Mechanism: Changing ankle motion alters the ground reaction force line relative to the knee.Qualitative only — possible changes, not predicted angles or effectiveness. Stiffness, alignment, footwear, available range, strength and motor control all influence the response.
Go deeper
Open each part when you are ready.
Where it sits
- Calf and foot sections connected by mechanical ankle joints.
Joints crossed
- Ankle and foot.
Movements it may allow, resist or constrain
- Typically allows dorsiflexion and blocks or limits plantarflexion (configurable).
Intended functional goals
- Clearance plus more natural tibial progression in stance.
Potential applications
- When some ankle motion is beneficial and available — after assessment.
Limitations, tradeoffs and precautions
- Bulkier; requires adequate range.
- Joint settings must be checked.
Individual assessment and fitting
- Joint stops, available range and tone.
- Response depends on stiffness, alignment, footwear, available range, strength and motor control. No device produces the same result in every patient.
What additional information would you need before considering this device?
- Range of motion at the ankle, knee and hip.
- Strength and motor control.
- Tone and spasticity.
- Sensation and skin integrity.
- Footwear, goals, cognition and ability to don/doff.
- Who will review fit and response over time.
Apply it
An articulated AFO with a plantarflexion stop typically…
Sources and review status
Draft — clinical review required
Starting points for verification. Validated protocols are linked where available; clinical content has not yet been reviewed.
Learning objectives
- Identify where a Articulated AFO sits and which joints it crosses.
- Explain which movements it may allow, resist or constrain.
- List factors that require individual assessment and fitting.