An EEG, or electroencephalogram, is a medical test that measures the electrical activity in your brain. It's a non-invasive procedure used to diagnose various neurological conditions. Small sensors (electrodes) are attached to your scalp to detect and record the brain's electrical signals, which are then displayed as waveforms on a monitor.
How an EEG Works
The test works by detecting the tiny electrical impulses produced by the activity of brain cells. These impulses create brain waves, which are characteristically different depending on your state of consciousness (awake, asleep, etc.) and the presence of any underlying neurological issues.
- Electrodes: Multiple electrodes are placed on the scalp using a conductive paste.
- Signal Recording: These electrodes pick up the brain's electrical activity, which is amplified and recorded by a machine.
- Waveform Analysis: The resulting waveforms are analyzed by a neurologist or other healthcare professional to identify any abnormalities.
What an EEG Can Diagnose
EEGs are commonly used to diagnose a range of conditions, including:
- Epilepsy: EEGs can detect the abnormal bursts of electrical activity (spikes and sharp waves) characteristic of epileptic seizures. [Source: Better Health Channel]
- Sleep disorders: EEGs help identify sleep disturbances like insomnia or sleep apnea by analyzing brainwave patterns during sleep.
- Brain tumors: EEGs may reveal areas of abnormal brain activity that could indicate a tumor. [Source: Mayo Clinic]
- Other brain conditions: Head injuries, encephalitis, and other brain conditions can also be assessed using EEGs. [Source: Cleveland Clinic]
The EEG is a painless and non-invasive test that provides valuable information about brain function. [Source: NHS] The results help healthcare providers rule out or confirm several conditions affecting brain activity. [Source: Healthline]
Understanding EEG Results
The interpretation of an EEG requires specialized knowledge. A neurologist analyzes the recorded waveforms to identify any irregularities. The results help in determining the appropriate course of treatment. [Source: WebMD] Different patterns of brain waves are associated with different states of consciousness and neurological conditions. [Source: Johns Hopkins Medicine]
