What you hold above your head is correct. Many robots resemble human arms, and have shoulders, elbows, wrists, even fingers. This gives a robot lots of options for moving, and helps it do things in place of a human arm.

In order to reach any possible point in space within its work envelope, a robot needs a total of 6 degrees of freedom. Each direction a joint can go gives an arm 1 degree. As a result, many robots of today are designed to move in at least 6 ways.