Distinguish static from dynamic balance testing and provide clinical examples.

• A. Static: Romberg, Sharpened Romberg; Dynamic: TUG, Dynamic Gait Index, gait under dual tasks
• B. Static: Functional reach test; Dynamic: Romberg
• C. Static: Romberg; Dynamic: Gait speed measurement
• D. Static: Tandem stance; Dynamic: Dynamic Bar Test

Answer: (A)

Static balance testing evaluates the ability to hold a stable position without moving, while dynamic balance testing assesses stability during movement, turning, and tasks that require ongoing control of posture. Romberg and Sharpened Romberg are classic static tests: the person stands still, often with eyes closed or in a tandem stance, and the amount of sway or the time they can hold the position reflects static postural control and reliance on vestibular and proprioceptive inputs. For dynamic balance, the tests involve movement and changes in task demands: the Timed Up and Go measures how quickly someone can rise from a chair, walk, turn, and sit again, capturing functional mobility and stability during a sequence of actions; the Dynamic Gait Index assesses gait while performing varied tasks (like head turns or navigating obstacles); and gait under dual tasks challenges walking while doing a cognitive or secondary motor task to test automatic balance control under multitasking. This answer best reflects the key distinction between standing still versus moving with balance demands, which is why it is the most accurate match. Other options mix static and dynamic tasks in ways that don’t align with how these tests are typically used to assess balance.