Move Over, BlackBerry Thumb, Guitar Hero Wrist And Carpal Tunnel!(CBS) You've heard of Blackberry Thumb, Guitar Hero Wrist and Carpal Tunnel Syndrome. The latest over-use or repetitive motion injury to join the Digital Age list is Cell Phone Elbow, says CBS News medical correspondent Dr. Jennifer Ashton. It's known in the medical community as Cubital Tunnel Syndrome, Ashton said on The Early Show Wednesday. It's caused by too much bending of your arm to put a cell phone to your ear, Ashton explains. That compresses the ulnar nerve, which runs along the bony bump on the inside of the elbow. Pressure...