aivosähkökäyrän

Aivosähkökäyrä, commonly known as EEG, is a non-invasive neurophysiological method used to record the electrical activity of the brain. Electrodes are attached to the scalp to detect and measure the tiny electrical charges produced by brain cells. These electrical signals are then amplified and recorded by a machine, creating a visual representation of brainwave patterns.

EEG is a valuable diagnostic tool used by neurologists and other medical professionals to evaluate various brain conditions. It is particularly useful in diagnosing and monitoring epilepsy, as it can identify abnormal electrical discharges that characterize seizures. EEG can also help detect and assess the severity of other neurological disorders such as sleep disorders, brain tumors, stroke, and encephalopathy.

The recorded brainwave patterns are categorized into different frequencies, each associated with distinct states of brain activity. For example, alpha waves are typically observed when a person is awake and relaxed with their eyes closed, while delta waves are prominent during deep sleep. Beta waves are associated with active thinking and concentration, and theta waves are often seen during drowsiness or light sleep.

While EEG is a powerful tool, it's important to note that it measures the combined electrical activity of large populations of neurons and does not pinpoint the activity of individual cells. Interpretation of EEG results requires specialized knowledge and is often considered alongside other clinical information and diagnostic tests to form a comprehensive diagnosis.