Which seating and positioning strategies support trunk control in CP?

• A. Custom seating with pelvic stability, lateral supports, a supportive back, adjustable cushions, and postural adjustments to maintain alignment.
• B. Minimal seating adjustments to avoid pressure points.
• C. Rely on standard chairs with no additional supports.
• D. Use only a wedge cushion to fix posture.

Answer: (A)

Pelvic stability is the foundation for trunk control in cerebral palsy. When the pelvis is held in a neutral, aligned position, the trunk has a solid base from which to extend, rotate, and stabilize. A custom seating system that focuses on this pelvic stability—with the right seat depth and width, solid supports to keep the pelvis in place, and adjustments to maintain alignment—sets up the trunk for easier, more functional control.

Adding lateral supports helps prevent unwanted side-to-side movement, reducing scoliosis risk and keeping the torso centered. A supportive backrest maintains midline alignment and provides necessary extension or trunk support, so the upper body can participate in activities without compensatory bending or leaning. Adjustable cushions distribute pressure, accommodate leg and seat height, and allow fine-tuning of posture as needs change or as growth occurs. Postural adjustments enable ongoing alignment optimization for comfort, function, and skin integrity.

Options that minimize seating adjustments or rely on standard chairs with no added supports don’t address pelvic stability or trunk alignment, so trunk control remains compromised. A wedge cushion alone targets a single aspect of posture and lacks multi-point support to maintain midline alignment and pelvic stability.