Tonney lost his arm - now he has regained the feeling through a new prosthesis

A mixture of biology and electronics, so-called bionics, is what has helped Tonney.

Electrodes have been operated into his arm that attaches to the nerve endings that were cut during the amputation.

Those nerves still have contact with the brain and allow him to control the robot arm with thinking power.

The signals can also go the other way, and that's what makes Tonney feel in her artificial hand. 

However, a lot of training is required for motor skills to work.

See how Tonney learned to pick up coins and with her prosthesis in the clip above. 

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