TABLE I. The involvement of the memory systems and the associated brain structures in the reproduction and production of short (5 seconds) and long durations (14 and 38 seconds).

	Time estimation tasks
Duration	Reproduction	Production
5 seconds	Short-term memory	Short-term memory
	Working memory	Working memory
	Attention	Attention
	Frontal structures	Frontal structures
	delay	Comparison with a representation of time in semantic or procedural memory
14 and 38 seconds	Retrieval in episodic memory
	Bilateral medial temporal lobes	Right medial temporal and/or subcortical structures