i'm not sure of the terminology used, but is this something that crawling on the floor could help?

I have a book (really dodgy title but its a good book) "what to do about your brain injured child" by glenn doman, that emphasises the need for kids to get one skill before the next, and if one step is missed it can have effect on many different skills. For some kids, they may need to go back to rolling to then be able to move on, but for others it will be crawling or kneeling. The therapies can be intensive for children/adults with severe disabilities but can also have amazing results.