Austin and Lee burr hole system. USA. 1956. The basic design consisted of a device mounted on a burr hole in the skull. It allowed guidance at various angular adjustments. By passing the needle through the trephine after attaching the socket, AP...
Rand-Urban stereotactic arc system. USA. 1956. This stereotactic instrument was designed as an arc system in order to place the patient's head in various positions. It's clinical application of studies on stereotactically implanted electrodes in...