(EPSPs) evoked in the distal portions of the apical dendrite. This has been called the Dendritic Potential (DP). This is identical with Adrian's Superficial Response in direct cortical responses. At higher intensities the DP is followed by slow positive waves (Adrian's Deep Response) or by a prolonged negative wave lasting for more than 200 ms (Chang’s second component). The highest amplitude of DPs is found on the cortical surface, with the polarity shifted from negative to positive within the superficial layer.