What does an EEG measure?

An electroencephalogram (EEG) is a diagnostic tool specifically designed to measure the electrical activity of brain cells, known as neurons. This technique involves placing electrodes on the scalp to detect the electrical impulses that result from neuronal activity. The EEG provides a graphical representation of brain wave patterns, which can help in diagnosing various neurological conditions, such as epilepsy and sleep disorders.

The measurement of brain electrical activity allows clinicians to assess brain function and identify anomalies in brain wave patterns that might indicate issues such as seizures, brain injuries, or other neurological disorders. This capability is fundamental in a variety of clinical settings, emphasizing the importance of understanding and interpreting the electrical activity of the brain for medical diagnoses and treatment plans.