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. Author manuscript; available in PMC: 2019 Aug 1.
Published in final edited form as: Neurobiol Aging. 2018 Apr 4;68:34–47. doi: 10.1016/j.neurobiolaging.2018.03.030

Figure 5. Correlations Between Negative Object Memory and Features of Sleep Spindles.

Figure 5

Negative object memory was positively correlated with features of sleep spindles for young and middle-age adults. Spindle measurements were transformed into z-scores within each age cohort in order to represent the associations on the same scale across cohorts. Strength of associations was similar between age cohorts. The associations were significant within the young adults. A) Total number of spindles: Young, r = 0.47, p = 0.02; Middle Age, r = 0.54, p = 0.13, B) Spindle duration: Young, r = 0.53, p = 0.008; Middle Age, r = 0.60, p = 0.12, C) Spindle amplitude: Young r = 0.54, p = 0.006; Middle Age, r = 0.49, p = 0.19, D) Spindle power: Young, r = 0.52, p=0.01; Middle Age, r = 0.55, p=0.12.