The prosthetic arm may take a bit of courage to get used to but none the less it is still a working arm.The sensors on the arm detect muscle movement from the brain helping the arm move around and opening it and closing it like a real arm.
This relates to engineering because they had to think about how the sensors could memorize the muscle memory.They also needed to know build the blueprints and design for the prosthetic arm.
Click for more information: https://www.sciencedaily.com/releases/2017/04/170425093016.htm
