Figure 5.

Theta coherence of hippocampal and dorsomedial striatum. (A) Outline of a conditional spatial discrimination task, requiring rats to learn using a tone for choosing a right-/leftward turn in a T-maze. (B) Coherence of LFP activity between striatum and hippocampus during task performance. Inter-areal LFP coherence in the theta band (8–10 Hz) emerges around the time of the tone cue, i.e., at the decision point of the task. The red outlined box indicated the time-frequency region of interest. Note that coherence could not be explained by motor aspects of the task, and that the coherence was only observed in subjects learning the task as compared to non-learners. Adapted with permission from DeCoteau et al. (2007b).