Figure 4.

Rescuing of a Weak Memory When Paired with a Strong One

With enhanced excitability of neurons after learning (A–C) and without enhanced excitability of neurons after learning (D–F) are shown.

(A) Size of neuronal population responding during the recall of the weak memory (percentage of coding neurons, ff > 10 Hz) as a function of the weak-strong pairing time interval (negative intervals indicate that the strong memory precedes the weak one).

(B) Neurons that encode both the weak and the strong memory as a percentage of the sum of the neurons coding for each memory divided by 2.

(C) Dendritic branches containing clusters from both memories (i.e., two synapses of the weak and two synapses of the strong memory) as a percentage of the number of branches containing at least one cluster (i.e., two synapses) from either memory.

(D–F) Same as in (A)–(C), without learning-induced enhanced excitability.

Graphs show average ± SEM of 10 simulation trials. See also Figures S3 and S4.