Journal: Frontiers in Neuroscience

Article Title: Editorial: From Raw MEG/EEG to Publication: How to Perform MEG/EEG Group Analysis With Free Academic Software

doi: 10.3389/fnins.2022.854471

Figure Lengend Snippet: Article part of the special issue by order of publication date.

Article Snippet: BrainWave: A MATLAB Toolbox for Beamformer Source Analysis of MEG Data , Jobst et al. , Brainwave site , GNU/ GPL , MEG , Beamformer , MATLAB , , Yes.

Techniques: Software, Functional Assay, Biomarker Discovery, Activity Assay, Selection, Imaging

Journal: Human Brain Mapping

Article Title: Neural correlates of time distortion in a preaction period

doi: 10.1002/hbm.24413

Figure Lengend Snippet: Basic results of ERF analyses. (a) Neuromagnetic activity induced by the release and repress movements (motor factor) when the first target length was 1,200 ms (1,200 ms trials). Left and middle panels show lateral and top views of a source‐space t‐map (SPM 12) comparing action (A) and no‐action (NA) trials. In this and subsequent figures, thresholds of source‐space maps were lowered into p < .005 for visual purpose only. A right panel shows a sensor‐space t‐map. The t‐values comparing mean amplitudes of vector‐norm ERFs (1,200–1,500 ms) between action and no‐action trials were color‐coded on a contour map depicted over a two‐dimensional (2D) layout of 102 sensor positions. (b) Vector‐norm ERFs at a sensor over the anterior motor region (see a white square in a). Red and black lines denote action and no‐action trials (background shading: SE across 18 subjects). Build‐up increases of ERFs in a preaction (first‐target) period indicate that this region was related to both preparation and execution of manual movements. (c) Vector‐norm ERFs in the posterior motor region. Sharp increases of ERFs around 1,400 ms suggested that this region was related to the execution of manual movements. (d,e) Comparison of filled and unfilled conditions (visual factor). An onset of a white disk (first target) elicited strong MEG responses in all types of trials (0–400 ms). This was followed by a persistent activity stronger in filled than unfilled conditions (400–1,200 ms), which reflected a continuous presentation of the white disk [Color figure can be viewed at http://wileyonlinelibrary.com]

Article Snippet: MEG measurements and basic data analyses Neural activity was measured by a whole‐head MEG system (Vector‐view, ELEKTA Neuromag, Helsinki, Finland).

Techniques: Activity Assay, Plasmid Preparation, Comparison

Journal: Human Brain Mapping

Article Title: Neural correlates of time distortion in a preaction period

doi: 10.1002/hbm.24413

Figure Lengend Snippet: Definition of a ROI (region of interest). (a) A 2D layout of 102 sensor positions (left) and 12 sensors over the SMA (right) defined in our previous study (Noguchi & Kakigi, 2006). The spatiotemporal cluster‐based analysis (see section 2) were performed over the 12 sensors (L1–L5 over the left SMA, R1–R5 over the right SMA, and M1–M2 on a midline). (b) Vector‐norm ERFs averaged across the 12 sensors over the SMA. (c) Results of point‐by‐point paired t test. We compared amplitudes of vector‐norm ERFs between F‐A and F‐NA trials at each time point and each sensor position. Resultant t‐values were color‐coded and plotted as a function of time. Two spatiotemporal clusters were identified at L2–L5 (890–1,048 ms and 1,056–1,200 ms) showing stronger neural activity in F‐A than F‐NA trials. (d) Sums of supra‐threshold (> 2.11) t‐values (upper panel) and numbers of supra‐threshold time points (lower panel) within cluster 1 (890–1,048 ms, solid lines) and cluster 2 (1,056–1,200 ms, dotted lines). Data at individual sensors (L2–L5) are separately shown. (e) Vector‐norm ERFs at the L5. Action preparation produced a larger build‐up activity than no‐action trials in filled but not in unfilled conditions. This resembled the visual–motor interaction in behavioral data (Figure ​(Figure2).2). (f) Results of the response‐based (trial‐by‐trial) analysis at the L5. We pooled the data in filled and unfilled conditions, comparing trials in which first target were judged as longer than the second (“long” trials, red) with those in which the first target was judged as shorter (“short” trials, black) [Color figure can be viewed at http://wileyonlinelibrary.com]

Article Snippet: MEG measurements and basic data analyses Neural activity was measured by a whole‐head MEG system (Vector‐view, ELEKTA Neuromag, Helsinki, Finland).

Techniques: Plasmid Preparation, Activity Assay, Produced