For once, there was an unknown land, full of strange flowers and subtle
perfumes; a land of which it is joy of all joys to dream; a land where
all things are perfect and poisonous.
An elaboration/clarification in response to this explanation of how Bucky’s prosthetic functions, based on breakthroughs in the field of biotechnology that have been getting mainstream attention in recent years. Namely: Neuromusculoskeletal prosthetic technology, also known colloquially as ‘bionic arms’.
While Bucky’s prosthetic more advanced because it uses comic book science, this information is helpful all the same; especially for people writing his character (and if you are, I encourage you to research this technology and get a grasp of the fundamentals).
To start, the socket is osseointegrated. This in itself is not new a new surgical technique and is a long-established method of amputation. What osseointegration means is the socket that prosthetic attaches (or 'anchors’) to is integrated into/fused with Bucky’s bones.
Now, how do these prosthetics move and feel? Here is a brief, but informative explanation targeted at laypeople:
