Electroencephalography (EEG) is a neurodiagnostic technique that measures the electrical activity of the brain using electrodes placed on the scalp. It provides a non-invasive way to monitor brain function.
Key Characteristics / Core Concepts
- Measures brainwave activity: EEG detects tiny electrical signals produced by the brain’s neurons.
- Non-invasive: Electrodes are placed on the scalp, requiring no surgery or injections.
- Real-time monitoring: EEG can record brain activity in real-time, making it useful for diagnosing conditions involving sudden changes in brain activity.
- Different brainwave patterns: EEG readings show different patterns (delta, theta, alpha, beta, gamma) which reflect different states of consciousness and brain activity.
- Wide range of applications: From diagnosing epilepsy to studying sleep, EEG is versatile.
How It Works / Its Function
Electrodes placed on the scalp pick up the electrical signals generated by neuronal activity. These signals are amplified and recorded as brainwaves, which are then analyzed to identify abnormalities or patterns. Different brainwave frequencies are associated with different mental states.
Examples
- Diagnosing epilepsy: Identifying abnormal brainwave patterns during seizures.
- Monitoring sleep disorders: Assessing sleep stages and identifying sleep disturbances.
- Assessing brain injury: Detecting changes in brain activity after trauma.
Why is it Important? / Significance
EEG is a crucial tool in neurology and neuroscience for diagnosis and research. Its non-invasive nature and ability to monitor brain activity in real-time make it invaluable for understanding brain function in both health and disease.
EEG’s versatility and accessibility contribute significantly to advancements in diagnosis and treatment of neurological conditions.
Related Concepts
- Brainwaves
- Electrodes
- Neurology