the vertical/horizontal line thing (http://web.mit.edu/bcs/schillerlab/research/A-Vision/A5-2.html http://web.mit.edu/bcs/schillerlab/research/A-Vision/A5-2.ht.

the vertical/horizontal line thing (http://web.mit.edu/bcs/schillerlab/research/A-Vision/A5-2.html http://web.mit.edu/bcs/schillerlab/research/A-Vision/A5-2.ht...) is cool b/c it demonstrates an actual neural correlate of consciousness and gives this concrete example of how information from the retina gets turned into higher-level abstractions as it moves into the cortex.