Figure 4.

The effects of PKA activation on ascending axon and parallel fiber synaptic inputs to Purkinje cells. The effects of a 10 min application of 10 μm forskolin on alternate activation of ascending axon and parallel fiber pathway responses are shown. The data are presented as in Figure 2, a and b. Each pathway was activated at 0.2 Hz throughout. b illustrates the resulting changes in CV⁻².