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On-line in vivo DA measurements. Three electrical stimulations were carried out prior to administration of nomifensine. Twenty minutes after i.p. injection of nomifensine, 1 second and 25 second stimulations were carried out. The arrows indicate the responses. The inset provides an expanded view of the pre-nomifensine stimulations at 17 and 39 min. Note that a technical malfunction prevented accurate integrations of DA peaks from about 42 to 51 minutes.
