Well I got the nervous system info from page 3
of Trevor Thom. However, if you didn't use his books then you may not have covered it which might also have been why 1d2d3d4d was puzzled
I used two books for HPL; Trevor Thom and another called Human Factors for Pilots written by a multitude of people. I was glad because I had one question (about the perception of the clsing speed/time of a head-on aircraft) that was covered in one book and not the other (can't remember which though!)
Cheers
Whirls