Crosby missed the first 20 games of the 2011–12 season due to the lingering effects of his concussion. He returned on November 21, 2011 in a game against the New York Islanders, scoring two goals and two assists in a 5–0 shutout for the Penguins. However, after playing another seven games – scoring a total of 12 points in 8 games – Crosby's concussion-like symptoms returned in December 2011, possibly following an elbow hit by David Krejčí in his eighth game of the season. Despite passing a successful ImPACT test, Crosby decided not to return on the ice until he felt perfectly fine, stating that he also must "listen to body". Crosby returned to action on March 15, 2012, scoring an assist in a 5–2 win against the New York Rangers. Despite only playing 22 games, Crosby recorded 29 assists to go with 8 goals for 37 points, including his 600th career point. He later credited neurologists at UPMC and chiropractic neurologist Ted Carrick with helping him return to hockey.