Journal: PLoS ONE

Article Title: Cerebral cortex and autonomic nervous system responses during emotional memory processing

doi: 10.1371/journal.pone.0229890

Figure Lengend Snippet: The emotional audiovisual recall task required the participants to watch a video footage for 40 seconds (Watching) and recall the contents of the videos with their eyes closed for 180 seconds (Recalling). The participants were presented with pleasant stimuli in session 1 and with unpleasant stimuli in session 2. In the beginning of each session, a quiescent state with the eyes closed was imposed (Control) for 120 seconds in session 1 or 180 seconds in session 2. This sequential watching-and-recalling epoch was repeated 3 times (epochs 1, 2, and 3) with the same kind of stimuli. EEG and ECG were analyzed during the Control and Recall periods. The subjects were instructed to breathe naturally during EEG and ECG recordings.

Article Snippet: EEG and ECG recordings were simultaneously performed using a Nihon-Kohden Inc. system (Tokyo, Japan) with 19 EEG electrodes positioned according to the international 10/20 system (Fp1, Fp2, F3, F4, C3, C4, P3, P4, O1, O2, F7, F8, T3, T4, T5, T6, Fz, Cz, Pz) and with ECG electrodes placed on the right wrist and the left ankle (Lead II).

Techniques: Control

Journal: PLoS ONE

Article Title: Cerebral cortex and autonomic nervous system responses during emotional memory processing

doi: 10.1371/journal.pone.0229890

Figure Lengend Snippet: (A) A series of RR intervals ( RRI n ) was derived from the ECG. (B) After the spline interpolation, resampling was conducted. (C) Spectral analysis using a fast Fourier transform was applied to the resampled time series of the RR interval for about 60 s (59.392 s) at intervals of 2.048 s. (D) The absolute power spectra values in low frequency (LF, 0.04–0.15 Hz) and high frequency (HF, 0.15–0.40 Hz) components were obtained. (E) The power spectra of LF/HF were calculated from the power spectra values of LF and HF in fifty-seven or fifty-eight segments to obtain a time series of the power spectra of LF/HF ( X C ).

Article Snippet: EEG and ECG recordings were simultaneously performed using a Nihon-Kohden Inc. system (Tokyo, Japan) with 19 EEG electrodes positioned according to the international 10/20 system (Fp1, Fp2, F3, F4, C3, C4, P3, P4, O1, O2, F7, F8, T3, T4, T5, T6, Fz, Cz, Pz) and with ECG electrodes placed on the right wrist and the left ankle (Lead II).

Techniques: Derivative Assay