[eng] The Dentate Gyrus (DG), a neural circuit of the hippocampus, is known to
play a key part in the memory formation and consolidation process which
takes place in the brain. The Granule Cells (GC) of the DG with their
sparse firing in particular, are hypothesized to perform pattern separation by
relaying an orthogonal version of the Entorhinal Cortex (EC) input in deeper
structures of the hippocampus. In this study, we adapted a biologically
plausible model focusing on the point of view of a single GC in order to
analyze its synchronization behaviour with respect to the EC input. We
report that under Long Term Potentiation of the Perforant Path, the GC is
able to follow the EC in time, a behaviour known as Delayed Synchronization.
However, we could not find a regime where the GC temporally follows the
EC, a very interesting phenomenon coined Anticipated Synchronization (AS).
Since AS is expected to have a great impact in Spike Timing Dependent
Plasticity, we analyze the principles of the phenomenon and explain why the
DG does not exhibit this peculiar behaviour.