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Ontogeny (also ontogenesis or morphogenesis) is the origin and the development of an organism – for example: from the fertilized egg to mature form. It covers in essence, the study of an organism's lifespan. The word "ontogeny" comes from the Greek ὄντος, ''ontos'', present participle singular of εἶναι, "to be"; and from the suffix ''-geny'', which expresses the concept of "mode of production".〔 See ''-geny'' in the Oxford English Dictionary, second edition, 1989; online version March 2011, accessed 9 May 2011. Earlier version first published in ''New English Dictionary'', 1898. 〕 In more general terms, ontogeny is defined as the history of structural change in a unity, which can be a cell, an organism, or a society of organisms, without the loss of the organization which allows that unity to exist.〔Maturana, H. R., Varela F. J. (1987). ''The Tree of Knowledge: The Biological Roots of Human Understanding''. Boston: Shambhala Publications Inc., page 74〕 ==Ontogeny in psychoanalysis== Ontogenesis in a psychoanalytical context is the development of the whole organism, viewed from the light of occurrences during the life, not in the last place in the pre-history of early childhood, which has become unconscious,〔Sigmund Freud, Wolfman, Penguin Books, Great Ideas, P113〕 according to Sigmund Freud. After the possibilities of ontogenesis have been exhausted, phylogenesis might be explanatory of the development of a neurosis.〔Sigmund Freud, Wolfman, Penguin Books, Great Ideas, P112〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ontogeny (psychoanalysis)」の詳細全文を読む スポンサード リンク
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