Background: Panic disorder(PD) is a common and disabling psychiatric disorder. The etiology and pathogenesis of PD is still not clear. Studies have suggested that there are some disturbances in information processing in patients with PD. Brain evoked potentials as one of neuroelectrophysiological technics which can reflect the status of cortex simultaneously and have been used a lot in spiritual psychological field. Auditory, visual and somatosensory evoked potentials are three common and matural sensory ev...