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. 2012 Jan 30;23(1):12–19. doi: 10.1093/cercor/bhr366

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© The Authors 2012. Published by Oxford University Press.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 3. — Response entropy. The 4 panels (V5/MT on the left and EVC on the right) relate to response data pooled from the subjects for each TMS stimulus in a run and ordered in the sequence of presentation; that is, each run consisted of 4 phases and 20 stimuli/phase so there were 80 TMS pulses per run (x-axis of panels = 1–80). The top panels show the pooled P_λ (probability of seeing a phosphene), and the bottom panels show information entropy (H). For V5/MT, the baseline entropy is stable but a clear decline in H occurs with vestibular activation. In contrast, for EVC, the moderate decline in H with vestibular activation is comparable to the entropy spikes that seem to occur spontaneously throughout the record.