The Case of the Disappearing Spindle Burst

Figure 1

Spindle burst activity in motor cortex during REM sleep across the first two postnatal weeks in P4, P8, and P12 rats. At each age, the bottom trace is the hindlimb electromyogram (EMG), the middle trace is the band-pass filtered (1–40 Hz) local field potential (LFP) recorded from the hindlimb region of motor cortex, and the top trace is the root-mean-square (RMS;  ms) of the LFP trace. The records in the gray boxes are expanded at right.