| abstract |
A planar electrode which enables easy multi-point simultaneous stimulation and measurement of nerve cells as well as signal transmission and observation throughout many cells for more than a few days includes an insulating substrate (3), a multiplicity of equally spaced electrodes (1) thereon, a wiring section in which lead wires (2) are installed substantially radially from the electrodes, and an insulating layer covering the lead wires (4). The area of each electrode is in the range from 3 × 10² to 4 × 10² µm². |