Concept Graph & Resume using Claude 3 Opus | Chat GPT4 | Llama 3:

Resume:

1.-The lecture is by Slobodan and Tina on evoked potentials - visual, auditory, and vibrotactile.

2.-They use a paradigm presenter application to show stimuli. It's important to give clear task instructions to subjects.

3.-For the vibrotactile P300 paradigm, left pulse vibrations are the target and right ones are non-target.

4.-The auditory paradigm presents tone stimuli, similar to the clinical N100 evoked potential test that uses clicks.

5.-The visual N170 face/object paradigm shows images while the subject looks at the screen center.

6.-Preparing the subject involves seating them comfortably in a non-moving chair with no muscle tension.

7.-The EEG cap should be positioned properly, with the midline electrode aligned with the nose and Cz over the vertex.

8.-Active electrodes are used in the cap. The reference goes on the earlobe. Gel is applied to each electrode.

9.-Applying gel involves moving hair to expose the scalp, filling gel to the electrode top without bridging between electrodes.

10.-The g.Recorder software is used to view the EEG. Amplifier and channels are selected.

11.-A previously recorded EEG training file with Andras is loaded into EEGLAB for demonstration.

12.-Channel locations are imported. Different plots, filtering and epoching of the data are shown.

13.-Noisy epochs can be rejected. Baseline adjustment is performed. ERP images and average waveforms can be plotted.

14.-The N100 auditory evoked potential is visible on the Cz electrode after averaging.

15.-Slides on evoked potentials are presented. Various paradigm design software packages are discussed.

16.-Triggering solutions are reviewed, including parallel port, software, and LSL. G.TEC's g.USBamp and g.HIamp amplifiers are recommended.

17.-A 64-channel visual evoked potential example is shown, with real-time raw data and averaged waveforms visible during acquisition.

18.-The visual N170 peaks around 170ms on occipital and parietal channels. P100 and Cz peaks are also seen.

19.-Similar results were obtained with g.Nautilus dry electrodes, demonstrating their potential for visual evoked potentials under certain conditions.

20.-The lecture switches to demonstrating Simulink for real-time evoked potential processing, using customized blocks optimized for EEG.

21.-The g.HIamp amplifier is selected in the block settings. The vibrotactile paradigm is chosen.

22.-Nice alpha waves are visible when the subject closes their eyes, confirming a good EEG signal.

23.-The vibrotactile stimulator is placed, with left pulses as targets to be counted by the subject.

24.-Triggers are output on channel 9 for later offline averaging to find the P300.

25.-The Simulink model includes acquisition, paradigm, visualization, filtering, data saving, event counting, and averaging blocks.

26.-In response to a question, LSL is not recommended for precise ERP timing due to delay and jitter issues.

27.-Sampling frequency is chosen based on the expected ERP latency, with higher frequencies needed for shorter latency components.

28.-Stress can be assessed in g.BSanalyze by deriving heart rate variability from ECG and correlating it with EEG band powers.

29.-For precise ERP timing, the g.TRIGbox parallel port interface or E-Prime software are recommended over LSL.

30.-A video demonstrates applying gel to passive EEG electrodes, showing the ideal gel amount to cover the electrode without bridging.

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