Fair enough, I can see that the question wasn't super clear. I'm just wondering how closely the prosthetic device can replicate normal limb movement. I'm wondering if there is a significant delay in reaction time. If the processing time is increased since the device has to process the sensory input and convert it to muscle movement. The length of the reflex arc for the device versus regular limb.

While writing this out I decided that there is no way to compare to control since the time between accident and experimentation will result in damage to the remaining motor neurons I think, and the connections in the neural bodymap will be rewired over time. And that all will remain the same and the decay will differ for different patients, but you could measure within the same person (device versus intact limb response).

The average conduction velocity speed is approximately 20-80 m/s. It takes approximately 1 ms for a neurotransmitter to cross the synapses.

So I'm wondering if the extra circuit would add extra time or if the circuitry is actually much faster than for intact limbs. I found this paper Neuromuscular Rehabilitation in Manual and Physical Therapy that I'll dig into tomorrow morning, I'm just asking questions in case you have answers and can translate it into a form laypeople can parse. It's the best part of reddit in my opinion, having access to millions of minds with expertise in hundreds of topics. Sorry to bother you (;ŏ﹏ŏ)