AILING ROCKER MICKEY MARS CAN'T MOVE HIS HEAD.

MOTLEY CRUE star MICK MARS is a prisoner of his own home when he's not on the road with his band - because a debilitating form of arthritis has left him unable to drive anywhere. The guitarist was diagnosed with Ankylosing Spondylitis (AS) when he was 19 and reveals the degenerative disease has left him unable to move his head. He tells Blender magazine, "If I could go places I would, but I'm stuck.

"This stuff I have won't allow me to move my head, so I can't drive. It's quite an inconvenience." And the aging rocker reveals his condition is shrinking him. He adds, "This AS c**p has shrunk me down really small. I used to be almost five-foot-nine, and I'm just a little over five-three now. "It stinks... I'm just squashed." Remember, they were all on Larry King last month and just finished the heavt metal fest in Canada.