%0 Journal Article %T 0449 Characterizing Spindle Activity as a Time-Frequency Phenomenon %A Dimitrov, T, S %A He,, M %A Prerau, M, J %J SLEEP %V 43 %N Supplement_1 %P A172-A172 %@ 0161-8105 %D 2020-05-27 %I Sleep Research Society %~ DeepDyve