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The question ? between psyche and soma ? involves a reflection on the drive. In the first definition of the drive as a ? frontier ? concept, Freud refers to the ? demand made upon the mind for work ?. The ? delegation ? mode of the psychic representatives of a somatic drive raises some fundamental theoretical problems that the author seeks to examine in terms of their clinical and technical implications in the analytic treatments of patients whose representations cannot be assumed to have any particular fluidity.