Diagnostically Specific Findings in Posturography - Two Case Reports

Abstract

Posturography is an electrophysiological method for evaluation of balance in unsteady patients. Posturography is very accurate but has very low specificity for nosologic diagnosis when basic routinely evaluated parameters, e.g. centre of pressure displacement etc., are used.

However, power spectra analysis (Fast Fourier Transformation) of centre of pressure displacement during quiet stance can identify postural abnormalities patognomic for specific lesions of nervous system. We present two neurological disorders with specific posturographic patterns.

Typical 3Hz sway in patients with anterior lobe cerebellar atrophy and increase sway in higher power spectra (12-18 Hz) in patients suffering from primary orthostatic tremor.

Keywords

• posturography
• frequency analysis
• stance examination
• postural instability
• cerebellar ataxia
• primary orthostatic tremor
• primary orthostatic tremor
• parkinsons-disease
• postural sway