What is the purpose of electroencephalography (EEG)?

Electroencephalography (EEG) is a technique specifically designed to measure electrical activity in the brain. This is achieved by placing electrodes on the scalp, which capture the electrical signals produced by neuronal activity. These signals can reflect various states of brain function, including sleep patterns, responses to stimuli, and the presence of neurological disorders such as epilepsy.

The primary focus of EEG is the temporal resolution it provides, which allows researchers and clinicians to observe brain activity in real-time, making it a valuable tool in both clinical settings and experimental research. This capability distinguishes EEG from other methods that may evaluate brain function or structure, such as imaging techniques or hormonal assessments. Therefore, measuring the electrical activity of the brain is the correct and central purpose of EEG in the context of neuroscience.