M.W.
You and your husband have rocked his little world and knocked the security,stability and happiness out from under his feet.
He is acting out his sadness and frustration...plus he has a neurological problem onto of that that hinders his coping.
Try to be as calm as you can in these situations. Love him...love him...love him and do all you can to keep a regular schedule going in his life. Try to do things together as a "family" on occasion if at all possible.
I am sorry your boy is going through this. I feel so sad for him...and you.
Try to do fun things with him, have a peaceful nighttime routine with him, talk to him about how he feels. Be understanding and give him lots of approval when he does things well.
How about going to see a family therapist? I think it really would have helped me and my 3 siblings when my parents divorced. We didn't talk to anyone...just moved on with life and swept feelings under the rug. To this day we still have wounds that have not healed. Some of us have moved on but others have struggled seriously in relationships.
Good luck and best wishes at finding some help for your little guy!