Figure 6.

Diagram of the separate molecular pathways underlying short-term and long-term memory as derived from studies using single-trial aversive training paradigms. Leftmost dashed vertical line (marked with yellow triangle) denotes the the time of conditioning; subsequent vertical lines denote timepoints following the trial. The lower diagram illustrates the theoretical bifurcation of memory mechanisms into a protein synthesis-independent STM stream that governs behavior for the first few hours after training and a separate, protein synthesis-dependent LTM stream that begins to govern behavior only thereafter. The relationship, if any, between these two streams during multiple repeated conditioning trials is not clear.