Actually that's sorta not the case, and it is indeed a routing nightmare. Most vision processing is actually done in the far rear, with the signals traveling al

Actually that's sorta not the case, and it is indeed a routing nightmare. Most vision processing is actually done in the far rear, with the signals traveling all the way from the front to the back. However, there are two big reasons why this isn't as bad as you'd think: - The data from the eyes is already lightly processed. The way the neurons hook into the rods and cones is basically running a few convolutions all at once, and the result is what's sent back - Most sensory info gets centralized in the LGN before it's routed to the various parts of the brain, so it's about the same hop it would have to go through anyway We actually still have a lot of questions about what exactly is going on in the middle bit. It seems like structures deep in the brain have duplicate versions of all the sense processing and motor controlling centers. What do they do? Well reflexes probably, and maybe somehow motivation? Reward is tucked in there somewhere too, or so we think.