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. 2007 Mar 21;27(12):3285–3294. doi: 10.1523/JNEUROSCI.5202-06.2007

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Copyright © 2007 Society for Neuroscience 0270-6474/07/273285-10$15.00/0

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Figure 4. — Effect of hindleg load signals on ThC-joint motoneuron activity during forward and backward walking in an intact walking animal. A, Extracellular ProCx_HL (ProCx of the hindleg; top trace) and RetCx_HL (RetCx of the hindleg; middle trace) nerve recordings during stimulation of load sensors (bottom traces) in the hindleg during forward (i) and backward (ii) walking. Note that motoneuron activity switches from ProCx to RetCx during forward walking (i) and from RetCx to ProCx during backward walking (ii). B, Stimulus time histogram (bin width, 50 ms) showing the mean activity profile of ProCx (white bars) and RetCx (black bars) during stimulation of load sensors during forward walking (top histogram) and backward walking (bottom histogram). Data obtained from one animal from n = 18 (forward) and n = 33 (backward) stimuli.