Very excited to share our latest on the organization of activity in dopamine axons in dorsal striatum. We think they are important for reward learning by implementing spatiotemporal credit credit assignment.

biorxiv.org/cgi/content/sh… What we studied:
1) Scalar dopamine signals are not very useful.
2) There are lots of clues that vector-weighting RPEs can facilitate learning in complex environments.
3) So, local dopamine signals must reflect the functional specialization of underlying subregions...right??