What is the primary purpose of an EEG (electroencephalogram)?

The primary purpose of an EEG (electroencephalogram) is to analyze the brain's electrical activity. EEG measures the electrical impulses produced when neurons communicate with each other, providing insights into brain function. This is essential for diagnosing conditions such as epilepsy, sleep disorders, and other neurological issues, as it allows healthcare professionals to observe patterns of brain waves and identify any abnormalities in electrical activity.

In contrast, measuring blood flow in the brain, monitoring heart activity, or capturing images of brain structure are functions associated with other diagnostic tools such as fMRI, ECG, or CT/MRI scans. Each of these techniques serves a different role in medical practice, which highlights the unique position of EEG within the realm of neurological assessment.