how to make "addForce" only affect one of several connected objects (with hinge points)

I explain: I have a "stickman" made up of several parts joined by Hinge joints. What happens is that when I move the arms or feet of the doll using addforce, the whole body is affected. What I am looking for is that I can apply a force to them without the entire object moving (example: Stick Fight: The Game). I use the head as the parent (see the image), and the rest of the parts are joined from hinge joints. Sorry for my writing, I don't speak English.