Potentiels évoqués cognitifs en psychiatrie : expérience de terrain

Abstract

Cognitive Evoked Potentials (PEC) are endogenous potentials of non-invasive and ancient realization. It is a complementary practice that is not common in the psychiatric field. The description of the PECs carried out in the Limoges psychiatric hospital center is made around 2 groups of psychiatric pathologies: psychotic disorders, depressive disorders. The analysis of the different components of the PEC allows to better define the clinical characteristics in the patients. P300 and contingent negative variation (CNV) potentials describe clinical indicators such as psychomotor retardation, cognitive difficulties, anticipation, attention, memory and task integration. The P50 allows you to see the ability or not for a patient to filter sensory information. The combination of four tests (P300 in direct averaging, P300 in backward averaging, CNV and P50) provides additional detailed information, especially since associated pathologies are frequent in the same patient. The treatment of patients often presents several associated molecules. The aim of this work is to take stock of this additional assessment of psychiatric disorders in a neurophysiology unit.