electroencephalographs

An electroencephalograph, often abbreviated as EEG, is a medical device used to record the electrical activity of the brain. This activity is generated by the synchronized firing of neurons, creating small electrical currents that can be detected on the scalp. The EEG machine amplifies these signals and displays them as wavy lines on a screen or paper, representing brainwave patterns.

The process of performing an EEG is non-invasive. Small metal discs, called electrodes, are attached to the patient's scalp at specific locations. These electrodes are typically connected to wires that lead to the EEG machine. The patient is usually asked to remain still and may be instructed to perform simple actions like closing their eyes, opening them, or taking deep breaths. Sometimes, flashing lights or sounds are used to observe the brain's response.

EEGs are primarily used for diagnosing and monitoring various neurological conditions. They are particularly valuable in the evaluation of epilepsy, where they can help identify abnormal electrical discharges associated with seizures. EEGs are also employed to assess sleep disorders, brain injuries, brain tumors, and to determine brain death. The patterns recorded by an EEG can provide insights into the overall health and function of the brain.