If shaking hands with someone you've already met, you might even consider the two-hand grab: placing your free hand on the other person's elbow adds warmth and enthusiasm to the handshake.

如果你同之前相识的人握手的话，你可以考虑双手握住他：将你空出的另一只手置于他的手肘上，这会使你显得更热情。

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The pulses of electricity in the brain are then translated into commands to move the arm, which bends at the elbow, wrist and could grab an object.

BBC: Paralysed woman's thoughts control robotic arm