Examples of propagating plumes. (A) A plume in the hyperpallium of Bird 5 that sweeps across the grid in a similar direction as the plume in Figure 2 from Bird 6, but in a shorter time span. (B) In the same recording of Bird 5, plumes can propagate in different directions, and in complex ways. (C) A propagating plume in caudomedial nidopallium (NCM), a forebrain region that is distant from the hyperpallium, where most recordings in this study were performed. (D) A propagating plume in caudolateral nidopallium (NCL), a forebrain region that is maximally distant from the hyperpallium. This plume was recorded 3.5 mm lateral from that in NCM (in different birds).
Beckers et al. BMC Biology 2014 12:16 doi:10.1186/1741-7007-12-16