Early cluster replay levels for forgotten items during ripple events were significantly greater than zero (t 9) = 3.29, p = 0.009).
Its stars are unusual, perhaps unique, in having a variety of chemical compositions, as though they came from more than one earlier cluster.
For subsequently remembered remote items, encoding activity from the late but not the early cluster was more replayed during ripple events than during the overall (averaged) peri-ripple periods (late cluster: t 9) = 2.61, p = 0.028; early cluster: t 9) = 1.31, p = 0.22).
Two separate temporal clusters were identified (Fig. 2a) with regard to encoding, an early cluster (100 500 ms, blue frame) and a late cluster (500 1200 ms, black frame; both pcorr < 0.001).
RSAsame values were higher for remembered than forgotten items in the late (t(11) = 3.75, p = 0.003) but not the early cluster (t(11) = 0.45, p = 0.66; Fig. 2b), indicating a relevance for subsequent memory only for the late cluster.
Further analyses showed that replay of activity from the late cluster was higher than replay of activity from the early cluster for remembered items (t 9) = 2.92, p = 0.017), while the pattern was reversed for forgotten items (t 9) = 2.04, p = 0.071).
Despite this book's early cluster of sobering titles – "Nominal Aphasia", "Walking Stick", "Macular Degeneration" – Glass Wings is no study of old age, but a series of vignettes from a full life.
The Yankees imposed their real or imaginary mystique in only three of their six postseason games in the Stadium, but Alfonso Soriano's game-ending homer on Sunday and last night's early cluster of runs touched off a lighthearted celebration.
Similarly, only ripple-triggered replay of activity from the late but not the early cluster during nREM sleep supported later memory, suggesting similar benefits of deep representations during ripple-triggered replay.
