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Figure 3. The tadpole swimming network and role of reticulospinal hdIN neurons. A, Diagram of the touch sensory pathways to the opposite side from the head and trunk skin, and the hindbrain and spinal neurons controlling swimming. Tt trigeminal touch sensory; RB Rohon-Beard touch sensory; dlc dorso-lateral commissural sensory pathway; hexN hindbrain extension; hdIN hindbrain descending; cIN reciprocal inhibitory commissural; aIN recurrent inhibitory ascending; mn motoneurons. Red triangles are glutamatergic excitatory synapses. Blue circles are glycinergic inhibitory synapses. Synapses onto a box connect to all neurons in the box. B, Recording from a right hdIN where activity in the whole swimming network (seen in left ventral root: green, vr) could be initiated by positive current and terminated by negative current into this single neuron. The right hindbrain was transected just caudal to the otic capsules (see Fig. 1C). 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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