Progress in the application of P300 in depression

Depression is a common mental disor-der with low mood,loss of interest and pleasure as main symptoms.Because of depending on the subjective diag-nosis of psychiatrists,its diagnosis is no reliable objective basis.P300 research findings can be used as an objective diagnostic indicator for patients.This paper mainly intro-duces the current research status of event-related poten-tials for depression and introduces the scientific research and clinical significance of P300 for depression.