Two neuronal systems involved in short-term spatial memory in monkeys.

The investigation of the neuronal activity in the monkey cerebral cortex during the delayed spatial choice performance allowed us to develop the hypothesis about two neuronal networks supporting the operative memory. The work of one of them is based on the relay-race and reverberation principles of information transfer. Another neuronal network provides for the reliability of transfer phases of these processes. The two networks are present in both prefrontal and parietal association cortical area.