This document discusses, among other things, examples of a low profile instrument immobilizer and means for positioning the same. In one example, the low profile instrument immobilizer grasps, secures, and immobilizes an electrode or other instrument that extends through a burr hole in a skull to a target...http://www.google.se/patents/US7704260?utm_source=gb-gplus-sharePatent US7704260 - Low profile instrument immobilizer
