A neurocomputer (50) comprises n oscillating processing elements (60A, 60B, 60C, 60D and 60E) that communicate through a common medium (70) so that there are required only n connective junctions (80A, 80B, 80C, 80D and 80E). A rhythmic external forcing input (90) modulates the oscillatory frequency of the medium (70) which, in turn, is imparted to the n oscillators (60A, 60B, 60C, 60D and 60E). Any two oscillators oscillating at different frequencies may communicate provided that input's power spectrum includes the frequency equal to the difference between the frequencies of the two oscillators in question. Thus, selective communication, or dynamic connectivity, between different neurocomputer oscillators occurs due to the frequency modulation of the medium (70) by external forcing.