Figure 2.
LTP elicited by ISO application during subthreshold stimulation requires β-adrenergic receptors and MAPK but not dopamine receptors. A, Application of propranolol inhibits LTP generated by pairing 5 Hz stimulation with ISO application (filled triangles). B, Application of SCH 23390 does not inhibit LTP generated by pairing 5 Hz stimulation with ISO application (filled squares). C, Application of PD 98059 inhibits the maintenance of LTP induced by pairing 1 × 100 Hz stimulation with ISO application (filled squares). All sample traces were taken 10 min after commencement of baseline recording and 120 min after stimulation protocol. Calibration: 5 mV, 2 ms.