part of meiosis I nuclear migration along microtubule dynein-driven meiotic oscillatory nuclear movement horsetail nuclear movement Dynein-driven meiotic oscillatory nuclear movement precedes meiotic recombination. Oscillatory movement of the nucleus involved in meiosis I. This oscillatory movement is led by an astral microtubule array emanating from the spindle pole body, and driven by the microtubule motor cytoplasmic dynein. HNM horsetail movement GO:0030989 biological_process meiotic cell cycle process