Dopaminergic Suppression of Synaptic Transmission in the Lateral Entorhinal Cortex

Figure 9

Blocking potassium channels prevent the dopamine-induced reduction in input resistance. (a) Blockade of Na⁺ channels with 0.5 𝜇M TTX does not prevent the reduction of peak or steady-state input resistance induced by 50 𝜇M dopamine (^*,𝑃<.01). Conventions are as in Figure 8. (b) In contrast, coapplication of the K⁺ channel blocker TEA (30 mM) prevented the dopamine-induced reduction in input resistance.