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Figure 6. Summation of EPSPs to firing threshold in reticulospinal hdINs following a head skin stimulus on the opposite side. A, Diagram to show the location of electrodes. The inset is the hdIN neuron recorded in C, D. B- C, Responses of hdINs to head skin stimulation (at arrow). B, Three superimposed responses from different neurons leading to firing (red arrowheads). Dots show resting potential. C, D. Responses of hdIN in A to stimuli above (C) and below (D) threshold for the hdIN spike and swimming (see top vr traces). (C, D) Arrowheads mark example EPSPs. E, Raster plot of EPSP latencies from 5 hdINs (different colours) over the first 150 ms after the stimulus when swimming did not occur. F, EPSP latency distributions for responses in E. G, Slower time scale recordings of responses below swim threshold show the prolonged responses in another hdIN. H, An average of responses in G. Image published in: Koutsikou S et al. (2018) © 2018 The Authors The Journal of Physiology published by John Wiley & Sons Ltd on behalf of The Physiological Society. This image is reproduced with permission of the journal and the copyright holder. This is an open-access article distributed under the terms of the Creative Commons Attribution license Larger Image Printer Friendly View

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