Apparatus for simultaneous feeding of electrical signals and measuring of potentials in probes

摘要

The device has two electrically decoupled surfaces in an electrode arrangement, whereby one of the surfaces is used to supply optional electrical stimulation signals and the other is used for potential measurement. The potential measurement surface is smaller, especially by a factor of at least 10, than the surface for supplying electrical stimulus signals. Independent claims are also included for the following: (a) a device for measuring conductivity; (b) a device for measuring three-dimensional tomographical conductivity distribution.