Which condition is a trigger for changing balance strategy?

• A. Stability limits exceeded or perceived to be exceeded
• B. Visual input dominates balance
• C. Automatic stepping occurs
• D. Quiet stance with eyes closed

Answer: (A)

The thing being tested is what prompts a switch in how we maintain balance. The key trigger is when the body’s stability limit is reached or believed to be reached—that is, the center of mass moves beyond the base of support or you sense you’re about to, and you switch to a more appropriate strategy to avoid a fall. When this boundary is exceeded, a quick change occurs, such as stepping to widen the base or using hip/trunk motions to pull the body back in, rather than staying with the same small-sway ankle pattern.

Visual input dominating balance can influence how you rely on sight for steadiness, but it doesn’t by itself force a change in the balance strategy. Automatic stepping is the actual response that occurs once balance is already compromised, not the trigger that initiates the change. Quiet stance with eyes closed makes balance more challenging by reducing sensory information, but the initiating trigger remains the exceedance or perceived exceedance of stability limits.