Title :
Instantaneous measurement of electrical parameters in a palm during electrodermal activity
Author :
Yamamoto, Yoishitake ; Isshiki, Hirorni ; Nakamura, Takao
Author_Institution :
Dept. of Electr. & Electron. Eng., Okayama Univ., Japan
fDate :
4/1/1996 12:00:00 AM
Abstract :
The determination of impedance can be performed by means of a frequency-domain analysis or a time-domain analysis. The latter has the advantage of being able to measure instantaneously all the frequency characteristics of impedance. The method is hence well suited to obtain the biological impedance which changes with time. An instantaneous method of measuring skin impedance, by using time-domain analysis has thus been developed. The fast Fourier transform (FFT) of the step response for current to the skin can determine the palm impedance. This method can carry out the determination of the parameters of the palm skin impedance during a galvanic skin reflex (GSR), which is impossible by means of frequency-domain analysis
Keywords :
bioelectric phenomena; electric impedance measurement; fast Fourier transforms; medical signal processing; signal detection; skin; step response; time-domain analysis; transient response; waveform analysis; biological impedance; circular arc law; electrodermal activity; fast Fourier transform; galvanic skin reflex; instantaneous measurement; palm electrical parameters; skin impedance; step response for current; three-electrode system; time-domain analysis; transient response; waveform analysis; Electric variables measurement; Equations; Fourier transforms; Frequency domain analysis; Frequency measurement; Impedance measurement; Senior members; Skin; Time domain analysis; Voltage;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
