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. Author manuscript; available in PMC: 2010 Sep 1.
Published in final edited form as: Eur J Neurosci. 2009 Aug 3;30(5):808–822. doi: 10.1111/j.1460-9568.2009.06866.x

Figure 2.

Figure 2

In vivo recordings indicate that tonic and phasic AGR activity originates from different spike initiation zones. A. Extracellular recording of dgn in vivo during a gastric mill rhythm. In this example AGR showed tonic activity. Arrowheads point at AGR action potentials. Inset: AGR action potentials were extracted from the recording to demonstrate its tonic activity. B. Variability of spontaneous AGR activity in vivo. Plot of average tonic AGR firing frequency and boxplot summarizing 17 preparations. Number of trials per animal 55 < n < 424. C. Same animal as in panel A during a different gastric mill rhythm. Here, AGR was phasically active during the burst of the GM neurons. Inset: Phasic AGR activity. D. Multisweep recordings of two extracellular dgn recordings in vivo. dgnp, posterior recording; dgna, anterior recording (see also Fig. 1B). Left: spikes traveled in posterior direction (n = 20 sweeps). Right: spikes traveled in anterior direction (n = 60 sweeps). Schematic inset in A indicates in vivo recording.