My brother is 33 years old. He lost his job 5 years back. Since then he has been going on spell where by.. He is often talks to himself. And his sentences are jumbled up.. And at times he would be completely normal.. This back and forth goes on for 3 /4 months in cycle. 4 month completely normal and 4 months of living a secluded life, talking to himself. He can't even sleep on these bad days. It looks like he is trying to fix the past. Please advice what can be done.