Anatomical dissection by Jean Riolan.
1 2018-10-03T20:41:53+00:00 Historical Medical Library of The College of Physicians of Philadelphia c90233dd07144836ce2dedca73e59366be819522 3 4 Anatomical dissection by Jean Riolan with a set of dissecting instruments behind. Title page from Les Oeuvres Anatomiques. Courtesy of the Wellcome Collection. plain 2018-10-09T15:22:31+00:00 Historical Medical Library of The College of Physicians of Philadelphia c90233dd07144836ce2dedca73e59366be819522This page is referenced by:
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Monstrosities of a Mother’s Making
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The idea that the power of thought could affect an unborn fetus was commonly held among medical practitioners before and up through the beginning of the early modern period. Yet it was only in the 17th Century when this concept of maternal impression took root as a cause of monstrosities.
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Jean Riolan (1580-1657), in his 1649 book, Opuscula anatomica nova, described one such case. A “double-fetus,” more commonly known as a conjoined twin, was born to a mother in 1605. The cause, according to Riolan, was the mother having looked at pictures of demons. Many believed at the time that the devil could directly affect an unborn fetus. In this case, however, the cause was the mother having seen, and then meditated upon, the images of demons that was the cause.
Riolan, was somewhat cautious in his belief in maternal impression. He believed that though the imagination could alter the properties of the fetus, it could not change the species. Fortunio Liceti (1577-1657), a prominent Italian physician, philosopher, and scientist, went further. He did not believe “mutilated monstrosities and those showing excessive parts” resulted from maternal impression; instead Liceti referred to monstrosities as lusus naturae (nature’s game).
As in Paré’s thirteen reasons, it was not always the imagination that caused a maternal impression, but rather an external event. Nicolas Culpeper (1616-1654), was an English botanist, herbalist, physician and astrologer. In his book A directory for midwives (1671) he described various accounts of maternal impression in the chapter “On Monsters.” Culpeper claimed that one woman, Anne Troperim, gave birth to two serpents after drinking from a brook near Basil, having swallowed the spawn of a serpent.