Abstract: A medical microelectrode has a front end, a rear end and a density at 20° C. of from 0.80 to 1.15. The electrode comprises any of: electrically conductive tubiform lead comprising a metal and/or an electrically conductive polymer, the lead having an outer surface and a sealed lumen; electrically conductive wire lead comprising a metal and/or an electrically conductive polymer, the lead having a surface and a buoyant element of a density of less than 1.0 attached to the surface.

Abstract: A medical microelectrode includes portions capable of movement relative to each other when implanted in or inserted into soft tissue, so as to increase or decrease their distance along the electrode. The electrode is at least partially embedded in a substantially rigid biocompatible matrix that is soluble or biodegradable a body fluid. Also disclosed are uses of the microelectrode; microelectrode bundles and arrays of microelectrode bundles and their uses; methods for inserting or implanting microelectrodes, microelectrode bundles and arrays of microelectrode bundles in soft tissue.

Abstract: An electrode array for insertion into soft tissue comprises a multitude of thin flexible electrodes each having a distal tip and a proximal end, wherein at least portions of the electrodes extending from their proximal ends are disposed in parallel. The electrodes are embedded in a matrix dissolvable in an aqueous solvent such as a body fluid. The matrix comprises two or more sections differing in their dissolution rates. A first section encloses a portion of the electrodes extending in a proximal direction from a distal portion thereof. A second section encloses a portion of the electrodes extending from the first section towards their proximal ends.

Abstract: A system for compensating a neurally triggered or other self-caused displacement of a tissue of an animal including man comprises a base provided with a means for immobilizing the animal or body part thereof comprising the tissue, one or more displacement means in contact with the base, a means for sampling position data from a marker disposed in or in the proximity of the tissue, a means for sampling source activity data from one or more sources of displacement, microprocessor means for correlating position data and source activity data to generate a predictive correspondence, a means for controlling the one or more displacement means by source activity data based on the predictive correspondence. Also disclosed is a corresponding method and use.