Moral is a difficult thing to obtain in an ICU, especially a Neuro unit. For the most part, well trained, well developed and experienced nurses come with well developed personalities and sometime difficult attitudes to tame. Many times I've seen the battle of wills clash on the floor. I come from one of two large level one neuro-trauma units that supports a combination neuro surgical team. Moral is all about the attitude. It is contagious. My suggestion is to display the attitude you wish to have and lay the rules down that a good attitude is expect of the staff with a "no tolerance" for back-biting.