While some mind-control technologies may not amount to much more than gimmicks, there's also plenty of serious research being done in the field -- particularly when it comes to artificial limbs. So far, the majority of that work has focused on robotic arms, but a team of researchers from the Veterans Affairs Medical Center in Long Beach, California have now made some progress with a robotic leg prosthesis controlled by EEG signals. As you might expect, things remain a bit limited at this point -- not amounting to much more than the ability to start and stop -- but the researchers say they've been able to achieve a 100 percent response rate with no "false alarms," and that the results are promising enough to begin tackling additional degrees of freedom like turning and sitting. What's more, while the system has so far only been tested on able-bodied individuals, the researchers hope that it will eventually be able to aid those with spinal cord injuries and aid in rehabilitation. You can get a quick look at it on video after the break.