This thread makes me think of this song... (Warning - it's a hard song to listen to if you're having sensory issues... very "busy" sounding). To me, the lyrics and feel of this song come the closest to describing sensory overload to the stymied non-concussed.
http://www.youtube.com/watch?v=jUwd737mioM
"Too much information running through my brain
Too much information driving me insane..."