"John H." <John at overhere> wrote in message
news:apsO8.1$ea5.294 at ozemail.com.au...
Liked this post as well, but
> .. in the retina, the differing roles for D1 and D2 receptors in
> center surround inhibition.
is, I have come to believe (thanks to Paul Bush's Net site), more
appropriately written "..... center/surround excitation/inhibition".
Peter
