What is the primary purpose of using electrodes in an EEG?

The primary purpose of using electrodes in an EEG is to measure the electrical activity of the brain. EEG, or electroencephalography, involves placing electrodes on the scalp to detect the minute electrical signals produced by the activity of neurons in the brain. These measurements help healthcare professionals assess brain function and can be used for diagnosing various neurological conditions such as epilepsy, sleep disorders, and other brain-related issues.

The use of electrodes is crucial because they provide a non-invasive way to capture and record these electrical potentials, which can then be analyzed to gain insights into overall brain health and functionality. This method of monitoring brain activity allows for real-time observation and assessment, which is invaluable in both clinical and research settings.