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. 2003 Feb 15;23(4):1114–1118. doi: 10.1523/JNEUROSCI.23-04-01114.2003

Fig. 1.

Fig. 1.

Hippocampal theta activity in a P2 rat.A, Nuchal EMG (top) and wide-band (1–3000 Hz) hippocampal activity (bottom) in a P2 rat with an electrode implanted in the CA1 field. Two bouts of theta can be seen (identified by the horizontal bars at thebottom), both of them occurring against a background of low muscle tone. Myoclonic twitches (mt) and awake behaviors (a) are indicated at thetop. Mean ± SD theta amplitude is 55 ± 2 μV. B, The second bout of theta inA is filtered to highlight multiunit (300–3000 Hz) and theta (1–35 Hz) activity.