An analysis is carried out of a set of psychic phenomena appearing always in the same way: an experience suddenly invades the consciousness, unfolding automatically and with great intensity. This psychic automatism, of which the patient is a passive observer, is accompanied by an overwhelming feeling of strangeness. Our hypothesis is that these phenomena are the expression of partial seizures with a psychic content. A comparative study is then made of the phenomenology of these partial seizures with a psychic content, on the one hand, and of that of positive syndrome of schizophrenia, on the other. It reveals a wealth of clinical information indicating an overlap between the two conditions. This inclines us to postulate of an existence of shared etiopathogenic mechanisms for both pathologies.