Which frame addresses issues with sliding or extensor tone?

• A. Backwards tilt-in-space frame
• B. Reclining frame
• C. Geri chair
• D. Planar head rest

Answer: (A)

The key idea is using seating configuration to change how gravity interacts with a person’s posture when extensor tone is high. A backwards tilt-in-space frame accomplishes this by tilting the entire seating system posteriorly. That posterior tilt encourages a more stable, posterior pelvic position and shifts the body’s alignment so gravity doesn’t promote forward sliding or excessive trunk extension as strongly. In this setup, the person can maintain comfortable hip and knee flexion while the backrest and seating support work together to dampen spastic extensor activity, making it harder for the body to slide out of place.

Compared with other options, the reclining frame changes the back angle but doesn’t address pelvic position and tone as effectively, potentially allowing shear or instability. A geri chair is more fixed and often lacks the adjustability needed to manage tone and sliding. A planar head rest doesn’t provide the postural support needed to influence extensor tone or prevent sliding.