Ah but what if it's a cascading effect?
   Snowball starts rolling from the visual cortex, the dominoes
   fall and by the time it reaches conscious processing, we're
   already 1/2 way there tongue emoticon

   Anyway, the issue of Attention is a very important one with
   regards to decision-making. We ignore nearly everything around
   us nearly all of the time (which is something that was always a
   struggle for me - I suspect I'm in the autistic spectrum
   somewhere) ... and I suspect we'll find decision-making
   happening all throughout our bodies.