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. 2002 Apr 1;540(Pt 1):119–128. doi: 10.1113/jphysiol.2001.013938

Figure 5. Activation of 5-HT1B presynaptic receptors occludes the effects of DA on the GABAB IPSP.

Figure 5

Examples of IPSP inhibition caused by 5-HT and DA. Only the 5-HT but not the DA effects are antagonized by the 5-HT1B receptor antagonist cyanopindolol (A). The inhibition of the IPSP caused by 5-HT is very similar to that induced by DA (B). The graph shows that the inhibition of the GABAB IPSP caused by DA and 5HT is not additive. Each column shows the average of four to eight cells (C).