A 72-year-old woman has mild unsteadiness without falls. She has no acute vertigo. SHA shows gain of 0.18 at 0.01 Hz (below the normal band of 0.25–0.55 at that frequency) but normal gain from 0.04–0.64 Hz, with normal Tc and symmetric responses.
RCT pattern
Three-panel SHA summary. Shaded green = published normal band. Solid marker = patient/archetype curve; dashed = overlaid reference if shown.