It is like a cycle with my dad. It can be every 3 to 4 weeks that he sleeps very little and he is going through the motions like he is working on his ranch. But he really isn't doing anything. There are also times that he wants to go home but he is home. You can take him on a drive and he recognizes his house but then he is in the house for a little while and it starts all over again. Is this normal behavior? If so why is it like a cycle?