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. Author manuscript; available in PMC: 2014 Apr 22.
Published in final edited form as: Neuron. 2006 Dec 7;52(5):921–931. doi: 10.1016/j.neuron.2006.10.021

Figure 6.

Figure 6

(A) Functional coupling during the delay period is apparent in simultaneously recorded pairs of neurons in dmPFC (vertical axis) and motor cortex (horizontal axis). This pair is initially positively correlated and then becomes negatively correlated as the rat waits to respond (diagonal axis). Spikes from the dmPFC neuron led those from the motor cortical neuron by −50 ms. (B) Another pair of neurons in dmPFC and motor cortex with delay-related functional coupling. This pair is negatively correlated early in the delay period and then becomes positively correlated. Importantly, in this example functional coupling exists despite the weak modulation of the dmPFC neuron during the trial.