Disclosed herein is a medium access control method in a single channel wireless network environment, which is a medium access control method of a receiving side terminal capable of communicating in a full-duplex communication scheme. Further, the data is \u201clocked\u201d into the cache or other fast memory until it is loaded for use. The robot may be controlled by a remote control station that also has a camera and a monitor. This transference can be accomplished using standard components, such as a pair of capacitor elements that are pulse-charged in parallel, but can be discharged in series following a reversal of charge on one of the capacitor elements. A variety of thin cutter blades are described which may be used in the interior of a thin intervertebral disc.