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. 2021 Feb 4;10:e60454. doi: 10.7554/eLife.60454

Figure 3. Gastric mill rhythms can be evoked by stimulation over physiological temperature range.

(a) Extracellular recordings from a preparation at 7°C (blue) and (b) 23°C (orange). Neuron action potentials described by their relative amplitudes on each nerve: lgn: LG (large bursting unit); dgn: DG (large, bursting unit; out of phase with LG: only on 7°C trace, has ceased bursting at 23°C), AGR (tonic), GM (small bursting unit; in-phase with LG); mvn: IC (large bursting unit), VD (medium bursting unit, antiphase with LG, alternates with IC), GM (small bursting unit; in-phase with LG); pdn: PD. (c) Spike rasters showing the activity of the LG neuron over the entire temperature range. The first row in (c) corresponds to (a) and the last row corresponds to (b).

Figure 3.

Figure 3—figure supplement 1. Comparison of spontaneous and evoked gastric mill rhythms within the same preparation.

Figure 3—figure supplement 1.

In 4 of 10 preparations, spontaneous gastric mill rhythms were observed at 11°C. (a) Extracellular traces showing activity on lgn, dgn, mvn and pdn nerves during spontaneous gastric mill activity (black) and after stimulation (blue). (b) Inter-spike intervals (ISIs) of LG neuron in the four preparations that showed spontaneous gastric mill activity. Black dots indicate ISIs from spontaneous activity and blue dots from evoked activity. (c) Comparison of burst period of LG during spontaneous and evoked bursting. Raw traces in (a) correspond to preparation 1 in (b).