start-ver=1.4 cd-journal=joma no-vol=45 cd-vols= no-issue=2 article-no= start-page=483 end-page=487 dt-received= dt-revised= dt-accepted= dt-pub-year=1996 dt-pub=19964 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Instantaneous measurement of electrical parameters in a palm during electrodermal activity en-subtitle= kn-subtitle= en-abstract= kn-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

en-copyright= kn-copyright= en-aut-name=YamamotoYoshitake en-aut-sei=Yamamoto en-aut-mei=Yoshitake kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=IsshikiHiromi en-aut-sei=Isshiki en-aut-mei=Hiromi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=NakamuraTakao en-aut-sei=Nakamura en-aut-mei=Takao kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Takuma National College of Technology affil-num=3 en-affil= kn-affil=Okayama University en-keyword=bioelectric phenomena kn-keyword=bioelectric phenomena en-keyword=electric impedance measurement kn-keyword=electric impedance measurement en-keyword=fast Fourier transforms kn-keyword=fast Fourier transforms en-keyword=medical kn-keyword=medical en-keyword=signal processing kn-keyword=signal processing en-keyword=signal detection kn-keyword=signal detection en-keyword=skin kn-keyword=skin en-keyword=step response kn-keyword=step response en-keyword=time-domain analysis kn-keyword=time-domain analysis en-keyword=transient kn-keyword=transient en-keyword=response kn-keyword=response en-keyword=waveform analysis kn-keyword=waveform analysis END