File:Wiki PecreauxLabfig1d.jpg

Caenorhabditis elegans one -cell embryo asymmetric division. Left, micrograph showing labelled microtubules in late anaphase. Middle, trajectories of the centrosomes obtained from automatic tracking of labelled centrosome, superimposed on a micrograph at pronuclear meeting. Time was color coded from blue to red. Right: Schematic representation of the 2 levels of model accounting for posterior displacement and anaphase oscillation of the spindle. Left, macroscopic model, featuring a spring and a dashpot (black) modeling the centering force and a negative damping and an inertial element(blue) modeling pulling forces. Right half, microscopic model, showing astral microtubules emanating of the centrosome (blue) and the cortical pulling motors pulling on them. Centering mecanism was not represented. If you use this image, please cite Pecreaux, J. et al. Curr Biol 16, 2111-22 (2006).