“Drawing a hand that looks like a hand remains hard—first surprisingly so, then stubbornly,” he writes. He adds, “most people are bad at what they haven’t spent years learning to do . . .

"I had to learn how to live again," Osheim said. Osheim, a full-time artist, creates signature ceramics and free-hand sketches at her studio, Möbius Keramikk.

"The goal from the beginning has been to create a prosthetic hand that we model based on the human hand's physical and sensing capabilities—a more natural prosthetic that functions and feels like a ...