PHOENIX — Ron Artest continued to show improvement today after suffering a concussion in an accident at his home Friday. He saw a neurologist again today, but was not cleared to rejoin the team. The Lakers will play the Phoenix Suns tonight. Artest will sit out for the second consecutive game. He told the team he was hurt when he fell down some stairs whiie carrying some boxes a few hours after the Lakers’ loss to the Cleveland Cavaliers.