めまい症における重心動揺検査で得られる各パラメータの検討

Abstract

There is no report to our knowledge describing stabilographic investigation of idiopathic vertigo. We investigated each parameter of stabilography in 112 patients with idiopathic vertigo.Stabilography was performed with eyes open and closed while standing with both feet together for 60 seconds using a stabilometer. The enveloped area, length/time, length/area, displacements in X- and Y- axes, Romberg ratio, power spectrum, velocity vectors, and standard deviation, kurtosis and skewness of amplitude histogram were measured. The velocity vectors, ranging 360 degrees, were divided into eight directions. Each was designated A-H from the anterior direction clockwise. We used age and gender matched data from 112 healthy subjects as a control group. Chi-square test was used for statistical analysis and p<0.01 was considered significant.The positivity rate in the patients was significantly higher than that in the controls for length/time (p=0.0062), velocity vectors A (p<0.0001), B (p=0.0005), E (p<0.0001), and F (p=0.0067).We found that the stabilogram in idiopathic vertigo patients tended to show anterior-posterior sway in good order. Our findings suggested that idiopathic vertigo is in part a functional and sensory abnormality without organic disease and has the potential to proceed to peripheral or central disease.