At one time autism was not known, until Leo Kanner described it. Just because the DSM has not caught up with the research that does not make it less real. I disagree that there are no criteria. Unfortunately there is no test like for strep throat and we have to rely on the reporting of parents and teachers.
One difficult question is "Where is the cut off point. We all have sensory peculiarities, but when does it become a disorder?"
Usually when proprioceptive dysfunction is explained the symptoms described are those of proprioceptive undersensitivity: bashing into things, crashing,
Since I was a toddler, I've struggled with sensory overwhelm. Namely, my mum tells me I refused to wear shoes at around 1,2 and 3 because I didn't like
MY 3 yr old son will put balls in his shirt and play. As soon as he realizes I am watching him he runs and hides. He is VERY persistent about me leaving