Fig 1.
Left side: Examples of BOLD time series (PCG and insula) from two characteristic individuals, one with vascular BOLD (nTD) oscillations (participant 13R1a; A) and one with neural BOLD (pTD) oscillations (participant 17R1a; B). Right side: corresponding PL profiles (i.e., plots of PL across time) with threshold (PLV for p = .05) for an individual with nTD (delay: -0.42 s, %sigbins: 84%) and an individual with pTD (delay: 0.05 s, %sigbins: 60%).
Table 1.
Mean (M) and standard deviation (SD) of PL delay and %sigbins in each hemisphere (25 participants).
Indicated are difference (D), t-value, degrees of freedom (df) and significance (p) of hemispheric differences. Data from rest 1 (R1), rest 2 (R2) and movement (MOV) sessions.
Fig 2.
Interhemispheric asymmetry plots of PL delay between SMC and insula for rest 1 (A), movement (B) and rest 2 (C). Gray regions indicate the hemisphere with a majority of neural BOLD signals (pTD). In panel A two representative individuals are marked (rest 1), one (17R1a) with bilateral pTD (indicated by a square) and another (13R1a) with bilateral nTD (indicated by a circle). D: Cartoon illustrates the BOLD direction in the four quadrants (quadrant b: bilateral pTD; quadrant c: bilateral nTD).
Table 2.
Spearman correlation coefficient (r) and significance (p) between %sigbins and HRV in the 0.1 Hz band for rest (R1, R2) and movement (MOV).
The respective numbers of participants (n) with positive (negative) time delays in the right (left) hemisphere are indicated. For example: in R1 were 13 pTD in the right and 7 pTD in the left hemisphere. The subjects indicated by bold numbers are used for correlation calculations.
Fig 3.
Significant positive correlation (p<0.01) between neural BOLD (%sigbins) and HRV (0.1-Hz power) in the right hemisphere of subjects with pTD in R1.