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Target size and spacing directly affect accuracy. Adjusting settings or adding a keyguard enhances usability. Advising more practice (B) or ignoring (D) creates frustration. Replacement (C) may not be needed. Immediate adjustment ensures functional communication.

Planning requires structured trials across feasible access options. Adaptive keyboards, voice recognition, and switch systems should be tested with outcome metrics. Prescribing eye-gaze prematurely (B), relying on caregivers (C), or delaying (D) limits independence. Evidence-based trials ensure the best match for academic participation and long-term use.

Calibration drift is often caused by lighting, positioning, or environmental interference. The ATP should recalibrate under consistent conditions and verify stability. Replacement (B) may not be needed. Ignoring (C) or disabling features (D) undermines usability. Proper calibration ensures consistent, reliable access and functional adoption.

Assessment must identify tone triggers and their effect on seating. Extensor tone can cause sliding, poor posture, and skin breakdown. Documenting these issues helps justify interventions like tilt/recline, pelvic supports, or custom seating. Color (B), peer input (C), and aesthetics (D) do not justify clinical need. Proper assessment ensures safe and functional seating outcomes.

At C5, grasp and finger extension are typically absent, limiting direct manipulation of small input devices. However, head and neck control are often preserved, making head-controlled pointing a strong first-line access strategy. Pairing head pointing with dwell-click or a light-action switch (e.g., cheek, temple) enables full cursor control and clicking without finger movement. Trials should assess calibration stability, pointer accuracy, visual strain, and endurance across real tasks (LMS navigation, document editing). A standard mouse (A) is not feasible without finger function; a keyguard assists typing accuracy but does not solve pointing. A strapped stylus (C) can create awkward wrist postures and may be inefficient given absent finger control. Foot control (D) is unsuitable if lower limb function is compromised or positioning is impractical in classroom seating. Begin with head pointing, but keep alternatives (voice recognition, on-screen keyboard with scanning, switch access) on the trial list. Objective metrics—task completion time, error rates, and perceived exertion—should guide the ultimate selection.