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. 2019 Sep 19;9:13539. doi: 10.1038/s41598-019-49328-1

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Spatial distribution (in the rostrocaudal direction) of the maps of the lumbar enlargement in cats and rhesus monkeys. The total length of the lumbar enlargement in the spinal cords of monkeys, cats and humans are approximately 40 mm, 30 mm^6,20,55 and 50 mm⁵⁶, respectively. Functional map data for cats were obtained from Mushahwar & Horch²⁰, Saigal et al.⁵, and Mushahwar et al.²¹. Anatomical map data were obtained from Vanderhorst & Holstege³⁵. Functional maps only include responses from ISMS in the gray matter of the spinal cords. The sizes of the spinal cord segments in cats used to convert the maps into spatial distribution were derived from measurements obtained from 4 cat spinal cords. HF: Hip Flexion, HE: Hip Extension, KF: Knee Flexion, KE: Knee Extension, AF: Ankle Flexion, AE: Ankle Extension. Error bars represent standard deviation.