[Regression and revitalization in hypnosis. Doubts and certainties, therapeutic utility]

The difference between age regression and revification is pointed out and the neurophysiological and psychological bases of hypermnesia of the past are discussed. Moreover, mental, neurological, somatic and visceral symptomatology of revification, the usual techniques to obtain it and its therapeutical usefulness are described. Possible artifacts of age regression and methods to avoid then are then presented.