In CTSIB condition 6, which senses provide inaccurate information?

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

Answer: (D)

In this CTSIB condition, two sensory inputs are deliberately made unreliable at the same time to force the system to rely on the remaining input. Here, the visual information is distorted because the sway-referenced visual surround moves in response to the person’s sway, making what the eyes perceive untrustworthy. At the same time, standing on a foam surface destabilizes sensory feedback from the feet and ankles, so somatosensory information becomes unreliable. With both vision and somatosensation providing inaccurate data, the vestibular system has to carry the load to detect head motion and help maintain balance. So, Vision and Somatosensory are the senses providing inaccurate information in this condition.