This paper examines the aspects of clinical practice in group therapy highlighted by Anzieu. The study of this text appears to be absolutely relevant to COIRAG, whose organization is particularly complex. In the training of future group psychotherapists, COIRAG proposes an integration of the different models of the federated associations that are present in COIRAG, and that have different methodologies and theoretical references, although all derived from a common root, psychoanalysis. The author addresses in particular the problem of the so-called "corporeal" groups, such as psychodrama, which methodologically involve real actions. The author proposes hypotheses that are based on the most recent knowledge of biology, and that show how these techniques, unlike what happens in verbal groups, are generally based on the mobilization of implicit bodily memories, thoughts that have never been thought, or thoughts that have been removed or denied, but preserved as they are in the body.