Patent ID: 7184812

Claim:
An electrode array, comprising: an electrode support; a group of electrodes mounted on the electrode support for measuring electrical activity in a subject's biological tissue; and an inter-electrode conductive medium having a given resistivity for controlling, during electrical activity measurement, resistivity between the electrodes of the group to improve said electrical activity measurement, the inter-electrode conductive medium including a coating formed of a first layer of conductive material applied to at least one electrode of the group and to the electrode support between the electrodes and a second layer of slippery conductive material applied to the first layer of conductive material to provide a lubricious interface to the subject's biological tissue, wherein, when electrical contact between at least one electrode of the group and the subject's biological tissue is poor, the inter-electrode conductive medium forms a means for producing on said at least one electrode an estimate of the electrical activity in the subject's biological tissue, said estimate being a mean value of electrical potentials produced on neighbouring electrodes of the group by the electrical activity in the subject's biological tissue.