Biomedical research charity the Wellcome Trust have made their image library available online. Searching for ‘brain’ or ‘psychology’ images produces hundreds of wonderful pictures from both the cutting edge of cognitive science and neurological investigations from times past.
All the images have been released under a Creative Commons licence, so you can use them without charge for non-commercial purposes.
It’s a really wonderful collection from both a scientific and artistic viewpoint and is enormously good fun to explore.
Link to front page of Wellcome Images (via BoingBoing).
Mind Hacks 
Pavlov’s dogs!
http://tinyurl.com/yogxpo