Table 2. Local maxima in Montreal Neurological Institute (MNI) coordinates.
Time window, MNI coordinates, p- and t-value of the local maxima of the different magnetoencephalographic (MEG) whole brain contrasts performed. The spatiotemporal distribution of these clusters at four exemplar time points can be appreciated in Figure 3.
| Time window | Local maxima | ||||
|---|---|---|---|---|---|
| t-test svPPA vs. HC | ms | MNI [x,y,z] | p-value | t-value | |
| Theta band [3–7 Hz] | |||||
| Left lingual gyrus | 0–212 | −10.0 –100.0 −10.0 | 0.005 | 3.7 | More ERD in svPPA |
| Left lingual gyrus | 412–612 | −8.5 –100.0 −8.1 | 0.005 | 3.1 | More ERD in svPPA |
| Right medial and superior frontal gyrus | 187–387 | 18.6 61.4 –14.7 | 0.001 | −3.92 | Less ERS in svPPA |
| Alpha band [8–12 Hz] | |||||
| Right precentral gyrus | 212–612 | 45.0 –15.0 40.0 | 0.001 | 3.4 | More ERD in svPPA |
| Left middle temporal gyrus | 287–362 | −59.8 –41.6 −1.0 | 0.005 | 2.8 | More ERD in svPPA |
| Bilateral medial and orbital frontal gyrus | 462–612 | −6.2 34.3 –24.9 | 0.001 | 5.1 | More ERS in svPPA |
| Beta band [12–30 Hz] | |||||
| Left cingulate cortex | 0–62 | −6.2–30.3 43.3 | 0.005 | 2.9 | More ERS in svPPA |
| Right medial frontal gyrus | 137–262 | 7.8 56.8 11.7 | 0.001 | 3.6 | More ERS in svPPA |
| Left middle temporal gyrus | 237–362 | −65.0 –20.0 −5.0 | 0.001 | −3.4 | Less ERD in svPPA |
| Left superior frontal gyrus | 587–612 | −21.8 46.7 45.7 | 0.005 | −3.1 | Less ERD in svPPA |
| Low-gamma band [30–55 Hz] | |||||
| Left lingual gyrus | 62–612 | −10.1–98.4 −8.9 | 0.001 | 4.2 | More ERS in svPPA |
| Left inferior occipital gyrus | 362–612 | −34.8 –93.9 2.7 | 0.001 | 4.1 | More ERS in svPPA |
| Right lingual gyrus | 212–437 | 18.2 –89.1 8.3 | 0.005 | 3.4 | More ERS in svPPA |
| Right medial frontal gyrus | 212–412 | 9.3 63.0 2.2 | 0.001 | 3.7 | Less ERD in svPPA |
| Left superior frontal gyrus | 262–462 | −3.8 62.8 14.0 | 0.005 | 3.6 | Less ERD in svPPA |
| High-gamma band [63–117 Hz] | |||||
| Left superior frontal gyrus | 62–137 | −36.5 26.6 48.8 | 0.001 | 3.4 | More ERS in svPPA |
| Left superior temporal gyrus | 62–287 | −48.2 –22.3 13.3 | 0.005 | 3 | More ERS in svPPA |
| Left parahippocampal gyrus | 212–312 | −15.5 –27.1 −6.5 | 0.001 | 3.3 | More ERS in svPPA |
| Right medial frontal gyrus | 287–337 | 13.2 70.7 0.6 | 0.005 | 3.2 | More ERS in svPPA |
| Left superior frontal gyrus | 287–612 | −22 68.4 14 | 0.001 | 3.6 | More ERS in svPPA |
| Right superior frontal gyrus | 462–612 | 43.9 54.7 17.2 | 0.001 | 3.9 | More ERS in svPPA |