Gelfand-Tsetlin principle of minimal afferentation and bistability of dendrites.

Neurons with bistable dendrites may fire persistently without persistent synaptic excitation while transient afferentation shifts the frequency of the persistent firing. These neurons change the firing frequency until they minimize their afferential input in a properly designed network. The afferentation minimum in this network is a stable state. The concept of the stable afferentation minimum generalizes Feldman's spring model of muscle control. An oversimplified network imitating the gamma-loop demonstrates the above statements.