we find that in our model the basic requirement for rhythmic behavior is the existence of local feedback circuits containing inhibitory neurons and that , when parameters of the model are chosen so that sustained rhythmic oscillations in the alpha frequency range are generated , the characteristic frequencies of these oscillations are primarily determined by the local circuit parameters , especially the duration of the inhibitory postsynaptic potentials , and are relatively independent of global circuit parameters such as the ranges of the long interconnecting axons and the propagation velocity of action potentials in these axons .
C0027882
neurons
C0004461
axons