Which is the medical term for crossed nerves in hands?

Come again?: I'm sorry, your question is not clear. Nerves aren't like electrical wires. They don't really "cross." Some nerves do communicate physically through connections called anastomoses, but the nerves aren't talking to each other. The nerve impulses always go between the brain and a muscle or a sensory structure, either outbound or inbound. Nerves don't "short circuit" like electrical circuits.