Table of Contents
Advertisement
Chapter 3
Chapt
GSR Amp
The FE116 GSR Amp is one of a family of modular devices called front-ends, designed to
extend the capabilities of the PowerLab system. Each provides full electrical isolation.
This chapter describes the basic features of the GSR Amp and discusses some aspects
of its use.
The GSR Amp is designed to provide a fully subject-isolated amplifier for measurement
of skin conductivity, in particular the Féré eff ect, which is the change in skin conductivity
when a subject is stimulated. This is also known as the galvanic skin response (GSR),
and gives a general measure of autonomic nervous system activity.
Measurement is displayed in SI conductance units (siemens), and absolute conductivity
of up to 100 µS (microsiemens) can be measured. Low, constant-voltage AC excitation
allows enhanced safety and the use of dry electrodes, with no special electrolytes
needed.
Owner's Guide
18
Advertisement
Table of Contents
