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. 2022 Jul 19;44(2):61–72. doi: 10.1007/s10974-022-09623-3

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© The Author(s) 2022, corrected publication 2023

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Fig. 2 — Hippocampal brain slices are pictured in a recording chamber where the concentration of O₂ in the bath and atmosphere are precisely controlled. Stimulating and recording electrodes are positioned to generate and record evoked potentials (the summed activity of many neurons). The inset shows an example evoked potential. The initial, brief downward deflection is the stimulus artifact and indicates when the slice was stimulated. The large downward deflection is the evoked potential. Photo credit Thomas Park