FIG. 3.

STDP in branching dendrites. Idealized dendritic trees with a varying order of branching were modeled, all are electrically equivalent to a single cylinder with L = 1. A: 0th order (left) and 3rd order (right) branching. In all cases the trunk diameter is 4 μm; the 3rd-order branch diameter is 1 μm. B: β for 0th- to 3rd-order branching as a function of the average synaptic weigh value, W. Density of the synapses is uniform per unit area (0.054/μm²). C: as in B but the density of the synapses is uniform per unit λ (600 synapses/λ). Only a slight decrease in the minimal β (black arrow) is observed in trees with higher branching orders.