Hello.
I see you have found the Traumatic Brain Injury & PCS Forum. I just replied to you there suggesting you give more information so that members may be able to offer some support. I'm sorry I had not read this message first.
I'm very sorry that your brother has been having such a difficult time since the sessions. Hopefully someone will read your messages who has some suggestions to help you. I do know that there are a number of people on TBI/PCS forum who also had adverse effects, so hopefully you will get some advice there.
You probably have already done it, but you can find all the older posts across the forum by using the
Forum Search Feature
There may be suggestions in some of the older posts there to help reverse these negative effects.
take care.