Here are some questions and speculations that are currently beyond the scope of this model but that I hope to address some day.  This is truly a random set.  I hope to impose order someday but I would not count on it.

1.    Why the LGN?  If the receptive fields are so similar to those in the retina why do we waste time with this stop?

2.    How can the brain interpret changeable receptive fields?  This question, as I currently see it, has something to do with the proper level of analysis of the retinal output and even the relationship between levels of analysis.