Hyungwon's Notebook

Image source Today, I would like to show you the procedure of EEG experiment. I will mostly focus on the EEG process such as how to appropriately place EEG electrodes to the head of the subjects, what needs to be notified to the subjects before implementing an experiment. (I will explain my work later.) Check and prepare requirements Connect all the cables to proper connectors and make sure that an amplifier is turned on. If connectors are loosely connected or linked to a different channel, it cannot receive the brain signals properly and you might guess the machine has been broken or the subject’s brain is not working. As you can see in Figure 1, there are a number of channels and buttons that you have to care about so just double check that cables are properly linked together and buttons are pressed correctly before you go to the next step. Figure 1. Each socket requires specific number of electrodes. Wash and dry electrodes and EEG cap. It is very important to re...

Image source Electroencephalogram (EEG) As the name implies, electroencephalogram (EEG) is a tool that records the electrical signals generated from neuronal activation in the brain. Simply speaking, EEG detects the brain activity and shows its activity signals to us. Since brain signals activated in specific experimental circumstances provide numerous information to researchers, EEG has been applied in many fields such as psychology, pathology and YES linguistics. If you haven’t seen EEG before, you might be wonder how it looks like and what it exactly does. From now on, I will explain it to you. EEG is not a huge machine but pretty compact one that is separated into several parts. The most expensive and important part in the EEG tool is an amplifier. As you can see in Figure 1, this small rectangular box is an amplifier. This tool amplifies the captured brain signals from the subject (a person who participates in experiment) Figure1. EEG Amplifier Since th...