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In his case, the "dexterity" loss comes from him using all four limbs as "hands" when not in prosthetics. For example, when he is writing with a regular (unadapted) pencil, he uses both arms (holding it with his elbows) to control the pencil, and then uses one/both legs to hold the paper steady. If he is in legs, he can't do this - the size, weight, and rigidity of the prosthetics don't allow this type of fine motor control.As I said, these are a supplement to his prosthetics, not a replacement. He has broken several prosthetics (aluminum, before we switched to titanium) due to running in them; but at minimum repairs take several weeks. When he outgrows a set of prosthetics it might be months to get a new set approved (most insurance companies DO NOT like approvi...

In his case, the "dexterity" loss comes from him using all four limbs as "hands" when not in prosthetics. For example, when he is writing with a regular (unadapted) pencil, he uses both arms (holding it with his elbows) to control the pencil, and then uses one/both legs to hold the paper steady. If he is in legs, he can't do this - the size, weight, and rigidity of the prosthetics don't allow this type of fine motor control.As I said, these are a supplement to his prosthetics, not a replacement. He has broken several prosthetics (aluminum, before we switched to titanium) due to running in them; but at minimum repairs take several weeks. When he outgrows a set of prosthetics it might be months to get a new set approved (most insurance companies DO NOT like approving $20000+ prosthetics for children, or insurance enters the codes wrong (e.g. approves a leg but omits the foot, or only approve one leg, etc.), cast, built, and adjusted.