To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Play VideoPlayMuteCurrent Time 0:00/Duration Time 0:00Loaded: 0%Progress: 0%Stream TypeLIVERemaining Time -0:00 Playback Rate1ChaptersChaptersdescriptions off, selectedDescriptionssubtitles off, selectedSubtitlescaptions off, selectedCaptionsAudio TrackFullscreenThis is a modal window. Captions Settings Dialog Beginning of dialog window. Escape will cancel and close the window. Text Color White Black Red Green Blue Yellow Magenta Cyan Transparency Opaque Semi-Opaque Background Color Black White Red Green Blue Yellow Magenta Cyan Transparency Opaque Semi-Transparent Transparent Window Color Black White Red Green Blue Yellow Magenta Cyan Transparency Transparent Semi-Transparent Opaque Font Size 50% 75% 100% 125% 150% 175% 200% 300% 400% Text Edge Style None Raised Depressed Uniform Dropshadow Font Family Proportional Sans-Serif Monospace Sans-Serif Proportional Serif Monospace Serif Casual Script Small Caps Defaults Done Movie 6. Gray level of the 2D MIP profiles (over the tracked red line bb′ from Fig. S1) with its centre of mass depicted in the graph by the blue triangle. Human sperm rotate with a conserved direction during free swimming in four dimensions Gabriel Corkidi, Fernando Montoya, Ana L. González-Cota, Paul Hernández-Herrera, Neil C. Bruce, Hermes Bloomfield-Gadêlha, and Alberto Darszon J Cell Sci 2023. 136:None-None; doi: 10.1242/jcs.261306 Download Original Video