Interleaving

What we intend by this notation is that the basal nuclei generate the suggested routine action PreMCR for PreMC, but they do not send it to PreMC, but instead to PFC for permission.

PFC may have an alternative creative action PreMCC to send to PreMC, however it can perform logic to make a decision between sending PreMCC or PreMCR to module PreMC.

Thus according to this theory the upper module is the regulator or controller of the routine action.

One main consideration is that in situations warranting routine action, this can proceed quickly. Thus PFC would simply select PreMCR without doing any or much computation.

This is to allow a rapid stream of actions to be generated by the basal ganglia and sent to module PreMC.