Movie 2.

A sperm cell with a translucid particle rigidly attached to its neck, whilst rotating 360 degrees during free-swimming motion.

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