Figure 4

Distance between external and internal ears. Distances between bilateral external ears (L_EE), bilateral internal ears (L_II), and left internal and external ears (L_EI-L) and right internal and external ears (L_EI -R) are shown according to CS. (See also Figure 2C.) L_EE and L_II increase with development, whereas, L_EI-L and L_EI -R remain approximately constant between CS 17 and CS 23