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. 2018 Jan 12;7:17121. doi: 10.1038/lsa.2017.121

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Copyright © 2018 The Author(s)

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/4.0/

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The angular velocity (in rad s^-1) of sperm head spin compared to the dynamic swimming parameters corresponding to >2100 bovine sperm trajectories. The data points enclosed in red represent the parameters from slithering sperm trajectories, which do not exhibit head spin, and therefore have zero angular head spin velocity. The magenta curve encloses 70% of all the data points, where the point density is higher than the magenta boundary. The color bar on the right represents the relative density of data points. BCF, beat-cross frequency; VCL, curvilinear velocity; VSL, straight-line velocity.