Hi, here's the link to the section Dav mentioned. There's a wealth of information there that may be helful for you. If you have any specific questions you can use the search feature for that forum and it'll bring up similar past posts and threads. All the best to your son and you all. Some people recover in some areas really fast but for others there can be longer term lingering issues. It's different for everyone.

https://www.neurotalk.org/traumatic-...sion-syndrome/