The artificial arm is directly attached to the skeleton, thus providing mechanical stability.
Then the human's biological control system, that is nerves and muscles, is also interfaced to the machine's control system via neuromuscular electrodes.
This creates an intimate union between the body and the machine; between biology and mechatronics.
advantages are : in a experimemntal study , a person with such prosthesis working as truck driver is able to lead a comfrtable and purposeful movements like using tool kits, removing screws, checking out other types of machinery works. even they could about to make him perceive sensations