Sensory Integration Disorder Support Group
Sensory Integration Disorder is a neurological disorder causing difficulties with processing information from the five classic senses, the sense of movement, and/or the positional sense. Sensory integration disorders vary between individuals in their characteristics and intensity.
As far as how long it took to see improvement -- in my son's case, there were some things that improved almost immediately, some that took longer. The main thing I have come to be aware of, however, is that no matter how much improvement he shows, when he gets stressed, by internal or external factors, his sensory issues flare up a lot. In a way, I find that helpful -- it is like a barometer of his stress level -- but it can also be challenging, especially when there is nothing I can do to reduce the stress (like when he's going through a growth spurt). That's when I look to the toolbox of techniques I learned from the OT, from books, from other parents, and I start trying to offer all the support I can. Before I had that toolbox, a stressful episode could send him into what looked like autistic behaviors -- just really shutting down and going inside, or completely flipping out. Now, it just never gets that far because it never becomes the vicious cycle it used to be.
I'm glad you got a diagnosis for your son, and I hope the OT goes well!