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Figure 2


Fig. 2. The transmission of presynaptic pair-spikes at unitary synapses that express facilitation, depression or parallel fluctuates among these three patterns in a chaotic manner. (A) The cumulative probability of uEPSCs shows that with a facilitation pattern, R2 ({diamond}) is larger than R1 ({circ}). (B) Difference between R2 and R1 (R2–R1) plotted vs time. R2–R1 values fluctuate irregularly around the dotted line (zero). (C) A depression pattern produces uEPSCs with a cumulative probability of R2 ({diamond}) smaller than R1 ({circ}). (D) R2-R1 values fluctuate widely around 0. (E) The cumulative probability of uEPSCs for R2 ({diamond}) and R1 ({circ}) overlaps with a parallel response. (F) R2–R1 values fluctuate around zero irregularly. Data points above dotted line denote synaptic facilitation and those below the line denote depression.





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