At 24 hr retest, with all subjects having received both a full night of sleep and a full day of wakefulness, we found that memory was superior when sleep occurred shortly after learning rather than following a full day of wakefulness.

Henry Gustav Molaison (February 26, 1926 - December 2, 2008), famously known as HM or H.M., was an American memory disorder patient whose hippocampus, parahippocampal gyrus, and amygdala were surgically removed in an attempt to cure his epilepsy.

Reviews of material separated by a long period of time (“spaced”) yield more learning than reviews separated by a shorter period of time (“massed”);

Memory consolidation is a category of processes that stabilize a memory trace after the initial acquisition