1. Lateral drawings of a 7- to 8-week embryo (A) and an 8- to 10-week fetus (B) show that the opening of the external auditory canal remains stationary but appears to rise because the progressive elongation of the jaw creates this impression.
Lateral drawings of a 7- to 8-week embryo (A) and an 8- to 10-week fetus (B) show that the opening of the external auditory canal remains stationary but appears to rise because the progressive elongation of the jaw creates this impression. (Modified with permission from Netter's Atlas of Human Embryology. Edited by Cochard, L.R., PhD Icon Learning Systems, Teterboro, New Jersey, Figure Netter Illustrations from ©Elsevier Inc, All rights reserved) .
P.M. Som, and T.P. Naidich AJNR Am J Neuroradiol 2014;35:10-18
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