Table 2.

Summary of hypothetical changes, inferred from the behavioral data, in the event-related production of tags and PRPs in different conditions in young (left) and in middle-aged (right) animals

Condition	Young animals			Middle-aged animals
	1	2	3	1	2	3	4	5	6
MOI	Weak	Weak	Strong	Weak	Weak	Strong	Strong	Strong	Strong
MME	n.a.	Novelty	n.a.	n.a.	Novelty	n.a.	Novelty	Encoded zone	2nd trial
Tags	↑	↑	↑	—	—	—	—	↑	↑
PRPs	—	↑	↑	—	↑	↑	↑	↑	↑
LTM (24 h)	Poor	Good	Good	Poor	Poor	Poor	Poor	Good	Good

Key: LTM, long-term memory; MOI, memory of interest; Weak, weak encoding; Strong, strong encoding; MME, memory-modulating events; n.a., not applied; PRPs, plasticity-related products.

↑ increase from baseline of no events, — insignificant change from baseline.