Robustness of retrieval properties against imbalance between long-term potentiation and depression of spike-timing-dependent plasticity

Physics – Condensed Matter – Disordered Systems and Neural Networks

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

9 pages, 4 figures

Scientific paper

10.1103/PhysRevE.68.061914

Spike-timing-dependent plasticity (STDP) has recently been shown in some physiological studies. STDP depends on the precise temporal relationship of pre- and post-synaptic spikes. Many authors have indicated that a precise balance between long-term potentiation (LTP) and long-term depression (LTD) of STDP is significant for a stable learning. However, a situation in which the balance is maintained precisely is inconceivable in the brain. Using a method of the statistical neurodynamics, we show robust retrieval properties of spatio-temporal patterns in an associative memory model against the imbalance between LTP and LTD. When the fluctuation of LTD is assumed to obey a Gaussian distribution with mean 0 and variance $\delta^2$, the storage capacity takes a finite value even at large $\delta$. This means that the balance between LTP and LTD of STDP need not to be maintained precisely, but must be maintained on average. Furthermore, we found that a basin of attraction becomes smaller as $\delta$ increases while an initial critical overlap remains unchanged.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Robustness of retrieval properties against imbalance between long-term potentiation and depression of spike-timing-dependent plasticity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Robustness of retrieval properties against imbalance between long-term potentiation and depression of spike-timing-dependent plasticity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Robustness of retrieval properties against imbalance between long-term potentiation and depression of spike-timing-dependent plasticity will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-250860

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.