I know this thread is old, I just found it in a google search I am doing, because I think my daughter (9) may have behavioural inhibition due to low muscle tone. My daughter freaquently has panic attacks, and I am reading if they have low muscle tone it is because they know what their body can and cannot do, and are freaked out by it! Some interesting reading: http://www.skillsforaction.com/low-muscle-tone and http://www.skillsforaction.com/highly-sensitive-childView Thread