Live imaging of embryonic skin development.
Live imaging of hair placode polarization.
Region specific cell movements during placode polarization.
Live imaging of tracked cells during placode polarization shows counter-rotational cell movements.
Counter-rotational cell movements fail to occur in Vangl mutants.
Counter-rotational cell movements occur in the direction of placode growth in Fz6 mutants.
Rho kinase inhibitor blocks counter-rotational cell movements in mid-polarizing placodes.
Shh mutant placodes undergo extensive but disorganized cell rearrangements.
Counter-rotational cell flows within the placode polarize the dermal condensate.