In CTSIB condition 6, which senses provide accurate information?

• A. Vision
• B. Somatosensory
• C. Vestibular
• D. Vestibular and Vision

Answer: (C)

In this CTSIB condition, the goal is to see which sensory inputs can still guide balance when others are made unreliable. The foam surface disrupts somatosensory feedback from the feet and ankles, and sway-referenced vision distorts what you see so visual information isn’t trustworthy. With both vision and somatosensation compromised, the only source of accurate information about head movement and orientation that the brain can rely on is the vestibular system. It detects head motion and orientation relative to gravity independent of what you see or the surface you’re standing on, so vestibular input remains the reliable cue for maintaining balance in this scenario.