TY - DATA T1 - The retention of cell assemblies with Hebbian and symmetric STDP windows. PY - 2014/07/09 AU - Naoki Hiratani AU - Tomoki Fukai UR - https://plos.figshare.com/articles/figure/_The_retention_of_cell_assemblies_with_Hebbian_and_symmetric_STDP_windows_/1098145 DO - 10.1371/journal.pone.0101535.g007 L4 - https://ndownloader.figshare.com/files/1586027 KW - Biochemistry KW - Neurochemistry KW - cell biology KW - Cellular types KW - Animal cells KW - neurons KW - Molecular cell biology KW - Computational biology KW - computational neuroscience KW - Circuit models KW - Coding mechanisms KW - neuroscience KW - Cellular neuroscience KW - Synaptic plasticity KW - Developmental neuroscience KW - Learning and memory KW - Theoretical biology KW - neurology KW - retention KW - assemblies KW - hebbian KW - symmetric KW - stdp N2 - (A) An asymmetric STDP window was calculated for JijEE = 0.15. (B) The retention time significantly varies with the release probability of STD. We defined the retention time as a period with a sufficiently large relative weights: wp>0.1JEE. (C) Raster plot of spiking activity is shown for the Hebbian STDP rule shown in A. (D) A symmetric STDP window was calculated for JijEE = 0.15. (E) Dynamics of the average synaptic weights at usd = 0.2 within (blue) and between (black) assemblies. (F) Raster plot of spiking activity for the symmetric STDP rule shown in D. (G) Relationship between the release probability usd and relative weight wp at t = 30 min. (H) (top) We constructed a histogram of the number of activation over all cell assemblies shown in F. The abscissa shows the number of activation of each assembly normalized by the average number of activation of all assemblies. (middle) We calculated a histogram for the occurrence of all possible 20 (5×4) sequential transitions between two assemblies. The occurrence number of each transition was normalized by the average occurrence number over all transitions. (bottom) Histograms of triplet transitions, such as assembly 1 → 2 → 1 (left) and 1 → 2 → 3 (right), are shown after a normalization by all possible 80 (5×4+5×4×3) triplet transition patterns. All three histograms are obtained from the results of five simulation trials. ER -