Figure 6.

Local and propagating waves can be distinguished by their LFPs at the site of initiation in the piriform cortex. A, B, LFPs in the piriform cortex are larger in amplitude and longer in duration for waves that propagate into the dorsal neocortex. C, Examples of LFPs for local and propagating waves. D, Scatter plot of LFP duration versus amplitude for all slices show clustering of LFPs for local versus propagating waves. Dashed lines indicate criterion values giving maximal separation of the waveforms (see Results). E, In individual slices, where there is less variation in overall mean LFP amplitude, clustering of local and propagating wave LFPs is more prominent. Dashed line indicates amplitude criterion that separates 100% of propagating wave LFPs and 94% of local wave LFPs (see Results).