I dont know about brain shocks. I will let others comment.

as far as drop foot, I drop my big toe. when i flex my foot, it takes longer to come up or curl with the rest of the piggies. I too drag my foot over carpets, and thresholds. I find when I lay down at night its the worst! I feel like I want to tape my ankle or foot to keep it from bugging me.

I hope you feel better, and welcome!