Fig. 3. Stippled area of the face indicates the soft tissues and bones of the skull formed by neural crest cells. Note that a portion of the lateral orbital wall and sclera is not included. (Johnston MC, Bhakdinaronk A, Reid YC: An expanded role of the neural crest in oral and pharyngeal development. In Bosma JF [ed]: The Fourth Symposium on Oral Sensation and Perception, pp 37–52. HEW Pub No 73–546. Bethesda, National Institutes of Health, 1973)