amplifier of 32 active scalp electrodes  (BioSemi)

Journal: Heliyon

Article Title: Voluntary self-initiation of the stimuli onset improves working memory and accelerates visual and attentional processing

doi: 10.1016/j.heliyon.2022.e12215

Figure Lengend Snippet: Self-initiated stimuli effect modulates early visual and attentional ERPs indexes. (A) Upper panel Topographical plots of the indicated times. Dots represent modeled electrode positions; red: positive voltage; blue: negative voltage; values in μV. Bottom panel. ERP grand average (n = 19 subjects) evoked by stimuli presentation (t = 0 ms, dotted line) in electrode Oz, per conditions. Only correct trials are included. (B) Similar to A, but for electrode Fz (n = 19). (C) Similar to A, but for electrode Pz (n = 19). (D) Left panel, box plot shows the peak-to-peak voltage (μV) of the P1–N1 component, per condition. Right panel, density plot shows the distributions of peak-to-peak voltage of P1–N1 per encoding condition. (E) Similar to D, but for P2 peak-to-peak amplitude. (F) Similar to D, but for P3 peak-to-peak amplitude. (G) Similar to D, but for P1 latency. (H) Similar to D, but for N1 latency. (I) Similar to D, but for P2 latency. (J) Similar to D, but for P3 latency. (∗: p ≤ 0.05; ∗∗: p ≤ 0.01; ∗∗∗∗: p ≤ 0.0001).

Article Snippet: We recorded Electroencephalographic (EEG) activity at a 2048 Hz sample rate using a BioSemi Inc. amplifier of 32 active scalp electrodes.

Techniques:

Journal: Heliyon

Article Title: Voluntary self-initiation of the stimuli onset improves working memory and accelerates visual and attentional processing

doi: 10.1016/j.heliyon.2022.e12215

Figure Lengend Snippet: P2 distinguishes between higher and lower accuracy. (A) Accuracy distributions box plots (y-axis) attributed by the CART node based on P2 latency (recorded at Fz electrode), with a split at 184.57 ms (top). The left box plot represents the accuracy distribution associated with P2 latencies earlier than the split. Conversely, the right box plot represents the accuracy distribution associated with P2 latencies later than the split. The number of cases per condition is equal to 19. (B) Scatterplot of accuracy (y-axis) as a function of the latency of the P2 component (x-axis), depicted by the condition (blue circles = AC; yellow triangles = AD; orange squares = P). The discontinuous vertical dashed line represents the split value of the CART model (184.57 ms). Each mark (whether circle, square or star) represents one participant (n = 19 per encoding condition).

Article Snippet: We recorded Electroencephalographic (EEG) activity at a 2048 Hz sample rate using a BioSemi Inc. amplifier of 32 active scalp electrodes.

Techniques:

Journal: Heliyon

Article Title: Voluntary self-initiation of the stimuli onset improves working memory and accelerates visual and attentional processing

doi: 10.1016/j.heliyon.2022.e12215

Figure Lengend Snippet: N1 better distinguishes encoding conditions. (A) Histograms of the number of participants per encoding condition (y-axis) attributed by the CART node based on N1 latency (recorded at Oz electrode), with a split at 174.32 ms (top). The left histogram represents the number of cases at latencies equal/earlier than the split. Conversely, the right histogram represents the number of cases at latencies later than the split. The number of cases per condition is equal to 19. (B) Scatterplot of accuracy (y-axis) as a function of the latency of the N1 component (x-axis), depicted by the condition (blue circles = AC; yellow triangles = AD; orange squares = P). The discontinuous vertical dashed line represents the split value of the CART model (174.32 ms). Each mark (whether circle, triangle or square) represents one participant (n = 19 per encoding condition).

Article Snippet: We recorded Electroencephalographic (EEG) activity at a 2048 Hz sample rate using a BioSemi Inc. amplifier of 32 active scalp electrodes.

Techniques: