in addition to head injuries and tumors, we also see a lot of strokes- both ischemic and hemorraghic.
Any "head" patient is very likely to exhibit strange behavior, hence the haldol. In addition, patients who are under psychiatric care often end up in the unit and they bring their psych issues with them.
We do get some alzheimer's/dementia patients. A lot of older people are on coumadin and that frequently leads to bleeds...and they end up in the unit. Once in the unit they are hooked up to tele, iv's, SCD's, etc. The first thing they do is start pulling at things...especially their clothes. So, yeah we see a lot of naked old people! (also naked young people and naked middle aged people!)
many neuro units also take trauma patients (car wrecks, motorcycle accidents, gun shot wounds, etc). Unfortunately, in many cases, these people come to us through their own....um, stupidity. Driving drunk, stoned, too fast, reckless...falling off ladders/balconies, etc while stoned/drunk...
These people bring their own set of problems like substance abuse and impusivness. Add that to pain and a head injury and you are in for a wild time!
I hope that answers some of your questions