足底皮膚から記録されたsympathetic skin responseの波形変化と潜時, 振幅, 慣れとの関連について  [in Japanese] Waveforms of Sympathetic Skin Response from the Sole Skin : Their Relation to Latency, Amplitude, and Habituation  [in Japanese]

健常者を対象に足底皮膚から記録されたsympathetic skin response (SSR)の波形と潜時, 振幅, 慣れとの関連性を検討した. 分析にあたってSSRの波形をPおよびNタイプに2分し, その出現パターンをP, N, Mパターンの3つに分類した. PタイプはSSRの陽性成分が陰性成分より大きいものであり, Nタイプはその逆に陰性成分主体の波形である. P(N)パターンとは出現したSSRが全てP(N)タイプ波形で構成されているものであり, 一連の記録に両タイプが混在するものをMパターンとした. 潜時, 振幅, 慣れは各波形パターン間で相違を認め, Pパターンの潜時が短く, 振幅が大きかった. また慣れはMパターンで顕著となる傾向を認めた.

The aim of this study was to investigate the relation of sympathetic skin response (SSR) waveform variation to latency, amplitude, and habituation. Twenty SSRs were recorded from the sole skins of 41 normal subjects by electrical stimulations (0.2 ms duration and 20 mA in intensity) which were given to the median nerve at the wrist. Waveforms were classified as one of two types, namely, the P type, in which the positive component was larger than the negative, and the N type, in which the negative component was larger than the positive. During successive stimulations, 6 of the 41 subjects had only P type waveforms (P pattern), 14 others only the N type (N pattern), and the remaining 21 both the P and N types (M pattern). Latency, amplitude, and habituation were modified by the appearance patterns of the SSR waveforms. The P pattern had a larger amplitude and shorter latency than the N pattern. Habituationwith time was more pronounced for the M pattern. This was compatible with previously reported results for SSR from the palm skins.