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. Author manuscript; available in PMC: 2015 Apr 1.
Published in final edited form as: Compr Physiol. 2014 Apr 1;4(2):851–887. doi: 10.1002/cphy.c130041

Fig. 13.

Fig. 13

Variation in relative contributions of cardiac and vestibular rhythms over time. Cross-correlation histograms of the relationship between muscle sympathetic nerve activity (MSNA) and galvanic vestibular stimulation (GVS; white histogram) and the electrocardiogram (ECG, black histogram) after dividing the data into four consecutive 30 s segments, each composed of 15 cycles of GVS (0.5 Hz). The relative influences of the cardiac and vestibular rhythms changed during the course of stimulation. The muscle sympathetic nerve activity (MSNA)—ECG cross-correlograms have been compressed vertically to better illustrate these temporal relationships: 100 spikes is represented by one division on the vertical scale for these data. 20 ms bins in all panels. n = the numbers of counts comprising the histograms. Same subject as in Fig. 11 and Fig 12A-C. Reproduced from (29), with permission.