Sleep physiology predicts memory retention after reactivation.Both sleep and future relevance influence memory consolidation; however, limited research has investigated their role in memory reconsolidation. 
Sleep physiology predicts memory retention after reactivation.
We manipulated the future relevance of both stable and labile memories in need of reconsolidation.  On the second evening, one group (Labile) received reminders designed to return their memories of syllable pairs to a labile state, while a second group (Stable) received reminders designed to leave these memories in a stable state.  Frontal delta (0.5-4 Hz) electroencephalographic power during Stage 2 sleep correlated positively with retention of future-relevant material exclusively in the Labile group.  Central theta (4-8 Hz) electroencephalographic power during rapid eye movement (REM) sleep correlated positively with the extent to which the Labile group selectively retained future-relevant material. 
Labile
We manipulated the future relevance of both stable and labile memories in need of reconsolidation.  On the second evening, one group (Labile) received reminders designed to return their memories of syllable pairs to a labile state, while a second group (Stable) received reminders designed to leave these memories in a stable state. 
Stable
Frontal delta (0.5-4 Hz) electroencephalographic power during Stage 2 sleep correlated positively with retention of future-relevant material exclusively in the Labile group. 
Stage 2 sleep