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- W926183428 abstract "Abstract: Embryology can be investigated qualitatively by reading the expressive gestures of the development of the human egg and sperm, their approach to each other in the pre-conception attraction complex, their union at conception, and the subsequent development of the embryo. These gestures tell a remarkable and consistent story. Much of this story has to do with the play of complementary opposites, and with the conversation that takes place, first, between the gametes, and then between the embryo and the mother. We can recognize complementary, or polar, opposites in the contrast between male and female, between center and periphery (embryo proper, on the one hand, and the fetal membranes and placenta, on the other), and between self and other. But in each case the play of opposites is a tension within unity. Moreover, the gestures at issue here are not gestures in the usual sense where we speak, for example, of the use of our limbs. Rather, they are growth gestures-the expressive movements by which the limbs and organs first come into being.Keywords: Embryology, Qualitative, Polarity, Growth, GesturesGiven the importance to us of questions about our own origins and destiny, and given all the conflicting views about our place in the cosmos, it is odd how rarely anyone thinks to look at our human origins and try to answer the questions directly. Where do we see the nascent human being coming from and going to? Can we not allow the new arrival to speak for itself?Listening to how the developing embryo speaks for itself has, in fact, been the long-time interest of the anatomist and embryologist, Jaap van der Wal.Giving and ReceivingIn the fall of 2007, I sat in a workshop as van der Wal projected onto a screen a series of images showing how a human embryo grows its arms, starting from the point where each arm appears to be nothing but a primitive precursor of the hand growing directly out of the shoulder. As the arms grow, the hands reach forward, around, and slightly downward in a grasping gesture rather like an embrace. Having completed this movement, the arms (as they continue to grow) briefly move apart somewhat, with the now much more hand-like hands turning in a palms-up direction, as if giving or receiving something.Embracing, giving, receiving: a fascinating sequence to watch, in some ways no different from the countless human gestures we see every day. But, of course, there is a great difference. The embryo is not using its arms in the way we do; it could hardly use its muscles and joints, given that it is busy growing them. What I was watching was, in fact, a gesture of growth-a gesture by which the arm and hand were being formed, as opposed to the later activity of an already formed limb that has become more or less fixed in its anatomical structure. But there is nevertheless an intimate relation between this first growth gesture and the later use of the arms, since the movement of growth is shaping the means for the later activity.In purely mechanical terms, there are many ways the arm and hand might emerge from the early embryo. Therefore, it is noteworthy that the actual gesture of growth already expresses something about the character of the human upper limbs as organs for grasping and offering, receiving and giving. Van der Wal, who has earned both M.D. and Ph.D. degrees and is currently an associate professor of anatomy and embryology at Maastricht University in the Netherlands, calls this embryonic performance a pre-exercising of the later capacities. In this he follows another embryologist, Eric Blechschmidt, whose name is attached to the Blechschmidt Collection and Museum at the University of Gottingen, where he oversaw the creation of almost 200,000 serial sections of human embryos, and 64 enlarged, total reconstructions of embryos of different ages. It was Blechschmidt who developed the notion of embryonic growth gestures, noting that we do not have to remain fixated upon the static, lifeless forms of dissected embryos. …" @default.
- W926183428 created "2016-06-24" @default.
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- W926183428 date "2013-04-01" @default.
- W926183428 modified "2023-09-27" @default.
- W926183428 title "The Embryo's Eloquent Form" @default.
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