平衡機能検査の分析におけるフーリエ変換法の応用
1989 年 48 巻 2 号 p. 111-121
詳細
1989 年 48 巻 2 号 p. 111-121
With the aid of diffusion computer the Fourier transform has generally been used to analyze the frequency responses of various bioelectric signals. We have introduced this method in the analysis of the following equilibrium tests
1) Frequency analysis of the body sway test.
2) Quantitative analysis of the galvanic body sway test.
In this analysis the inverse Fourier transform is used to detect frequency components of body sway responses corresponding to galvanic stimulations.
3) Computation of the gain and phase lags of the vestibulo-ocular reflex in the pendular rotatory test.
4) Analysis of the influence of linear acceleration on caloric nystagmus.
Although the Fourier transform can be applied simply by computer, a wrong diagnosis can result of analysis if it is applied without a full understanding this method. This paper describes the fundamental theory and practice of the Fourier transform in equilibrium tests.
