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. Author manuscript; available in PMC: 2015 May 15.
Published in final edited form as: Neuron. 2010 Dec 9;68(5):978–990. doi: 10.1016/j.neuron.2010.11.007

Figure 7. Drifting of spiral phase singularities.

Figure 7

A. Trajectory of spiral phase singularity during a 12-cycle spiral waves in cortical slices. B. Trajectory of spiral phase singularity during an 11-cycle spiral waves in vivo under Cch/bic application. Hexagon shows the field of view and each color represents one cycle of spiral wave. C. Trajectory of spiral phase singularities during 2 spiral waves (red and cyan, each with ~1.5 turn) during sleep-like states. Additional examples during sleep-like states are shown in Figure S5A. D. Comparison of drifting speed of spiral phase singularity for slices and in vivo. Five examples from in vivo under Cch/bic, in vivo during sleep-like states and slices respectively are shown. Columns with stars on top are from the examples in A-C. The standard deviation is large because the drifting of spiral phase singularity is not consistent and there are large variations from time to time. The difference between in vivo and slices is statistically significant (Welch’s test, P<0.001, 25 t-tests). The difference between in vivo (Cch/bic) and in vivo (sleep-like) is also significant. Average of traveling distance at unit time under these three conditions was shown in Figure S5B.