Pediatric Cerebral Palsy Gait Patterns: 2D Sagittal Stick Diagram

Real pediatric gait-lab reports are read as 2D sagittal-plane stick diagrams and joint-angle-vs-cycle charts, not 3D renders — this companion simulator draws it that way. A clinical-style stick figure, both legs overlapping in the same side-view plane, walks forward across a scrollable ground plane using the exact same key-framed hip/knee/ankle flexion curves as the 3D version, cosine-interpolated between clinical-trace control points. Switch between typical gait and three cerebral-palsy deviations seen in pediatric rehabilitation clinics — crouch gait (chronically flexed knees and hips), scissoring gait (spastic hip adductors pulling the thighs together) and toe-walking / equinus (no heel strike, early plantarflexion) — and drag the severity slider to watch a synchronized joint-angle chart plot how each curve departs from typical across the gait cycle, with a live cursor showing exactly where the walking figure is. Drag to pan the view and scroll to zoom, while live readouts track knee flexion at midstance, hip adduction in stance, ankle angle at heel strike and a crouch-severity index — the same landmarks a pediatric physiatrist reads off an instrumented gait-lab printout.