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. 2020 Oct 16;14:598888. doi: 10.3389/fnins.2020.598888

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Copyright © 2020 Latash, Lecomte, Danner, Frigon, Rybak and Molkov.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Cycle and phase durations and muscle activity during split-belt locomotion across intact and spinal cats. Cycle and phase durations in intact (A) and spinal (B) cats when the slow hindlimb (SHL) was stepping at 0.4 m/s while the fast hindlimb (FHL) stepped from 0.5 to 1.0 m/s in 0.1 m/s increments. Cycle and phase durations are shown for SHL (left panel) and FHL (right panel). We obtained 6–15 cycles in seven intact and six spinal cats (see Table 1, one cat was studied in both states) and averaged cycle and phase durations for each cat. Each data point is the mean ± standard deviation for the group of intact and spinal cats. (C) Hindlimb muscle activity and phase durations during split-belt locomotion with the slow limb stepping at 0.4 m/s and the right hindlimb stepping at 0.5 m/s (left panel) and 1.0 m/s (right panel) in one spinal cat. The black horizontal bars at the bottom of each panel show left (LSTA) and right (RSTA) stance phase durations. Data shown are from cat BL (Frigon et al., 2017). L, left; R, right; LG, lateral gastrocnemius; Srt, sartorius; VL, vastus lateralis.