Turns out you can up learning rate with a small current across brain Scientific American:
Amping Up Brain Function: Transcranial Stimulation Shows Promise in Speeding Up Learning
Electrical stimulation of subjects' brains is found to accelerate learning in military and civilian subjects, although researchers are yet wary of drawing larger conclusions about the mechanism....
I believe I've also seen some posts on external (strong) magnetic fields being able to hinder or help learning as well. Strange times we live in.
posted by aleph
on Nov 30, 2011 -