Autonomic nervous system modulation during self-induced non-ordinary states of consciousness

Figures

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  Figure 1. HRV time and frequency domain during Rest (green), Imagination (Imag, yellow) and self-induced cognitive trance (SICT, purple). SDNN standard deviation of RR interval, RMSSD the root mean square of standard deviation of RR interval, pNN50 the probability of RR interval greater than 50 ms, LF low frequency, HF high frequency, LFn low Frequency normalized, HFn high Frequency normalized, lnHF logarithmic transformed HF, ApEn approximate entropy (corrected for multiple comparisons, *p = 0.05; **p = 0.01).

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  Figure 2. Decoding accuracy for HRV time and frequency domain during Rest, Imagination (Imag) and self-induced cognitive trance (SICT) between two class problem by linear discriminant (LDA) classifier; *: 5% across maximum statistic distribution.

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  Figure 3. Comparison of thoracic respiratory rate, amplitude, phase and variability during Rest (green), Imagination (Imag, yellow) and Self-Induced Cognitive Trance (SICT, purple). RRV respiratory rate variability, SD BB standard deviation of BB (breath to breath) interval. RMSSD the root mean square of standard deviation of BB interval, a.u arbitrary unit, I/E inspiration/expiration (corrected for multiple comparisons, *p = 0.05; **p = 0.01).

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  Figure 4. Decoding accuracy for respiratory features during Rest, Imagination (Imag) and self-induced cognitive trance (SICT) between two class problem by linear discriminant classifier; *: 5% across maximum statistic distribution.

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  Figure 5. Individual difference and correlation between phasic and tonic HF during SICT and Imag conditions. Upper panel shows Tonic (i.e., Rest) and Phasic HF (i.e., HF-SICT minus HF-Rest or HF-Imag minus HF-Rest). Lower panel shows Spearman correlation between phasic and tonic HF for both conditions (SICT and Imag); HF high frequency, *p = 0.05.