Related Experiment Video
Updated: Jul 25, 2026

14:16
A New Application of the Electrical Penetration Graph (EPG) for Acquiring and Measuring Electrical Signals in Phloem Sieve Elements
Published on: July 2, 2015
[Electroepidermic activity]
Abstract:
Amplitude-time parameters of spontaneous fluctuations of the electroepidermic activity (EDA) were studied in human subjects during relative rest. Spontaneous EDA was shown to be markedly individual by character. No correlation was stated between the amplitude, period of spontaneous fluctuations, and baseline EDA. The amplitude variation range can reach 171% and the fluctuation duration range makes 85% of the mean value. The role and origin of spontaneous EDA fluctuations are discussed.
Related Concept Videos
Electrodes: Overview
Electrochemical measurements are conducted in an electrochemical cell composed of various components that control and measure the current and potential. One fundamental component is electrodes, conductive materials that enable electron transfer reactions at their surfaces.
There are two main types of electrodes in electrochemical cells. The first type, known as the working or indicator electrode, has a potential that is sensitive to the analyte's concentration and reacts to changes in the...
There are two main types of electrodes in electrochemical cells. The first type, known as the working or indicator electrode, has a potential that is sensitive to the analyte's concentration and reacts to changes in the...
Processes at Electrodes
The electrode interacts with ions in the electrolyte solution at its interface. The rate of oxidation and reduction depends on the speed at which electrons can transfer through this interface. As ions attach to or leave the electrode surface, the electrode acquires a charge, and an electrical potential forms across the interface, making the process more difficult to reach equilibrium. The charge on the electrode affects the local ion concentrations in the solution, though thermal motion...

