"the control of artificial limbs by thought alone"?

By thought alone... with the help of a device implanted into your brain. I noticed there is a quite alot of vagueness about what potential dangers this procedure can cause but even from what they do mention- invasive surgery, attendant risks, inflammation in brain tissue, it sounds as though there is alot of risk involved and some yet to be discovered side effects. It occurs to me that Western medicine/science has a hard time accepting the power of mind when it comes to self healing but for some reason when it can involve experimental surgery, implants, technology and money acknowledging the power of mind doesn't seem as difficult anymore. hmmm