Abstract: In order to attest the validity of neural electrode with the capability of micro-motion attenuation, comparative studies based on evaluation system for testing tissue injury were conducted. Different implantation parameters (depth: 1.5, 3, 4.5mm; insertion speed: 50, 100, 500, 1000, 1500, 2000μm/s) were set respectively for the experiment with the micro-motion attenuation electrode and the common electrode to study the affects of the two electrodes. This method is controlable, and can effectly avoid the uncertainty of vivo experiments. The conclusion was found that the modified electrode is not better than the reference electrode at the depth of 1.5mm. But it has obvious advantage on decreasing the tissue injury when the insertion depths are 3mm and 4.5mm.

Key words: neural probe, insertion parameters, tissue injury, digital image correlation, residual force