Unveiling Japan's ancient practice of cranial modification: The case of the Hirota people in Tanegas

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2. Tying babies to cradle boards is not, by itself,

a cause of changing the head shape. The Mayans and some other people of Central and South America, as well as a group on the Pacific Northwest, placed a board over the child's forehead, causing it to grow into a slanted form. The forehead board remained on the baby's head all the time in order to achieve the slant, but a baby on a cradle board remained there only while the mother was traveling or busy in a field or other work.