Figure 4. Various parameters of cells extending neurites on high-slope gradients 1 hour after differentiation.

(a) The length of the neurite associated with the most distant end-point was similar for attracted and repulsed cells (p = 0.798 by t-test). (b) The histogram of the initiation angles of the neurites indicates that the angle at which they sprouted from the soma was responsible for the guidance (p = 0.005 by χ²). (c) The histogram of the turning angle shows that turning while the neurite was extending was not responsible for guidance.