If someone is unable to reweigh sensory inputs, what is a possible result?

• A. Postural Instability
• B. Increased Range Of Motion
• C. Improved Balance
• D. Normal Stability

Answer: (A)

When the nervous system can’t adjust how much it relies on different sensory inputs for balance, it can’t compensate when one source becomes unreliable or conflicting. Sensory reweighting lets us rely more on vision or vestibular cues when somatosensory information isn’t trustworthy, and vice versa. If that adjustment isn’t possible, balance becomes harder to control, leading to instability or unsteady posture—that’s postural instability.

The other options don’t fit because they aren’t direct results of impaired sensory reweighting. Increased range of motion isn’t a balance failure; stability won’t automatically improve with reduced reliance on sensory input, and normal stability or improved balance would require effective reweighting to adapt to sensory conditions.