May 25, 2023, BioCRF(GZ), collaborating with Shenzhen Hanix United,Ltd, held an offline demonstration on Electroencephalograph (EEG) and Event-Related Potential (ERP) system.

Training Content

1. Engineer is explianing how EEG/ERP systems work.
2. Student tried on QUICK-20 multi-channel EEG/ERPs system with dry electrode.
3. Student tried on Braincap. Recording and Analysis software showed real-time data.

As we know, a local increase in cortical blood flow accompanies almost all neuronal responses to stimulus in the brain. This relationship, termed neurovascular coupling , involves many steps from the initial firing of the neurons to release of chemical transmitters to final vasoconstriction or vasodilatation. Understanding this relationship between brain activity and the resulting changes in metabolism and blood flow remains a vital research area.

EEG and fNIRS capture signals inherent to different steps in this cascade of events, linked to the same neural activity. The combination of these two methodologies offers the possibility to examine cortical activity more comprehensively. EEG and fNIRS have very different and complementary temporal resolution and functional localization features: while EPs detect the cortical response to a given stimulus with high temporal resolution, fNIRS localizes changes in oxygen metabolism that follow upon neural activation.

Also, ERP is needed to conduct many trials (usually in the order of 100 or more) and average the results together, causing random brain activity to be averaged out and the relevant waveform to remain. These stimuli can be visual, auditory, tactile, and even olfactory and gustatory. ERP will synchronize very accurately both the stimuli presentation and the EEG recording.

Engineer from Hanix brought the advanced BRAIN PRODUCT equipment to show how we can use EEG/ERP system to help carry out deep research on neuroscience. Students from Bioscience and Biomedical Engineering Thrust (BSBE) showed great interests and positively took part in the fun experiments. We believe that through this demo, students will get more familiar with equipment and bring up a vision on the future application.

Engineer is explaining how EEG/ERP systems work.

Student tried on QUICK-20 multi-channel EEG/ERPs system with dry electrode.

Student tried on Braincap. Recording and Analysis Software showed real-time data.