The movement of cilia of epithelial cells of the Left Right Organizer (LRO), also referred to as the node in mouse or the Kupffer's vesicle in zebrafish, resulting in the leftward fluid flow across the LRO and generation or transport of a signal which determines asymmetry in an organism's body plan with respect to the left and right halves.
nodal cilium movement involved in determination of left/right asymmetry