I am also interested in timing aspects of feedback in the mature system. This summer I intend to work on the problem of how myelination occurs. Myelin is the electrical sheath that wraps around axons to enable better conduction of the action potential. From a dynamical systems perspective the results are quite significant. A signal takes about 200 milliseconds to cross the corpus callosum in an unmyelinated axon but less than 10 milliseconds in a myelinated axon.
All axons start off unmyelinated.
This is something I will continue to work on when I leave SFI in October. I worked on an associative memory model called the Sparse Distributed Memory invented by Pentti Kanerva. This could be resurrected in various guises if need be. My wife is expecting our first baby around July 30th.