Can a LCD wall mount stay in the extended position

When buying a plasma television, having the right plasma mounts is almost as important as the television you choose. Don’t skimp on this important step. The right mounts will not only hold your new plasma in place, but will also provide the foundation needed to prevent it from falling and breaking. Unlike the old days, where your bulky television set sat on the floor, today’s TVs require installation and the right hardware to hold it up.

The only thing like that is like what you would see in a hospital room. It hooks to the wall (or the ceiling depending on the model) and has a shelf that swings out from that. You then set the tv on the shelf part. They sell them at most sears stores.