Brendan Shanahan heard the same sounds when he stepped onto the Madison Square Garden ice as when he left it 32 days earlier. The cheers and chants of "Shanny, Shanny" filled the arena when the popular 38-year-old forward took his first shift Wednesday night after a long layoff caused by a severe concussion. "There are nerves and apprehension," Shanahan said following the Rangers' 5-0 victory over Philadelphia in which he had two assists. "What you're conditioned to do and what you're trained to do in those situations is to go full steam ahead.