1. An apparatus configured for sensory input processing within a spiking neuron network, comprising: a first plurality of nodes configured to generate a spiking signal based at least on the sensory input; a second plurality of nodes configured to generate one or more output spikes based at least on receipt of the spiking signal via a plurality of connections; and a logic module configured to evaluate an efficacy of the plurality of connections, and to modulate an adjustment of the efficacy of the plurality of connections based at least on the efficacy evaluation; wherein: the efficacy of individual ones of the plurality of connections comprises a weight applied to a process of a given neuron based on a receipt of the one or more output spikes; and the efficacy evaluation comprises a determination of a percentile rank of values of the weight for the plurality of connections over a time interval prior to the adjustment modulation.