Electroencephalography
EEG
Description
"Electroencephalography" (EEG) tracks your brain’s electrical activity to help diagnose conditions like epilepsy, sleep disorders, or unexplained behavior changes. Small sensors are placed on the scalp to monitor brain waves during rest or activity. Doctors often recommend this test for symptoms such as seizures, memory lapses, or blackouts. Abnormal patterns can reveal neurological dysfunction. EEG results guide treatment decisions, including medication or further testing, and support ongoing care for seizure or cognitive disorders.
Category
Brain Function
Procedure
Non-Invasive, Invasive
Sample Type
No biological sample is needed for this test.
Units
Not Applicable
Procedure Category
Measure
Test Group
Neurocognitive Assessment Group
Test Group Description
Neurocognitive Assessment Group: Tests within this group focus on evaluating various aspects of cognitive function and brain health. These assessments provide insights into memory, attention, language, and executive functions.
Optimal Range
For All Individuals:
Result: Negative: No abnormalities detected.
Normal Range
For All Individuals:
Result: Negative: No abnormalities detected.
Results That Differ From The Norm (Direct and Indirect Causes)
Abnormal results may indicate:
Alcoholism
Alzheimer's disease (Neurodegenerative memory disorder)
Brain infection
Drug abuse
Encephalitis (Brain inflammation)
Epilepsy (Recurrent seizures)
Head injuries
Hemorrhage (Brain bleeding)
Ischemic stroke (Brain blood flow blockage)
Migraines
Narcolepsy (Excessive daytime sleepiness disorder)
Tumors
Key Reasons For Testing
Brain Activity Recording: EEG records brain's electrical activity via scalp electrodes.
Neurological Evaluation: Diagnoses epilepsy, seizures, sleep disorders, and brain tumors.
Epilepsy Diagnosis: Detects abnormal discharges, guiding treatment and medication response.
Sleep Disorder Assessment: Evaluates sleep patterns for conditions like sleep apnea or narcolepsy.
Brain Lesion Localization: Identifies areas of abnormal activity for surgical planning.
Brain Function Monitoring: Tracks activity during anesthesia, surgery, or intensive care.
Health Status Conditions It May Be Used To Assess
Currently, this test is not directly associated with any conditions listed on the Health Status page. However, it may be included as part of a broader set of tests linked to specific health conditions.
Some Prominent Medical Labs That May Offer This Test
Please note that this particular test has not been associated with any of the listed prominent medical labs. We recommend enquiring with your private physician or nearest hospital to determine where this specific test can be performed.
References
Important Note
Any medical procedure yielding results outside the norm may be directly or indirectly linked to the conditions outlined on this page. Various factors, including genetics, medication and supplement usage, recent illnesses, pregnancy, pre-test eating, smoking, and stress, can impact the test's outcome. Additionally, factors like false positives, false negatives, inaccurate analyses, and others can influence results.
Reference ranges, which help healthcare professionals interpret medical tests, may vary depending on age, gender, and other factors. They may also differ between laboratories due to variations in instruments and methods used. Optimal ranges are designed for preventive purposes, aiming to identify trends and potential risks early, while normal ranges reflect conventional laboratory values indicating no current disease or pathology. Your healthcare practitioner may have specific reasons for testing that deviate from the usual or may interpret results differently based on individual circumstances. Proper interpretation typically involves considering clinical findings and other diagnostic tests. Hence, it is crucial to provide your healthcare professionals with a comprehensive medical history, consult with them for result interpretation, and follow their guidance for potential re-testing or additional diagnostics.
Disclaimer
This content is provided solely for informative and educational purposes. It is not intended as a substitute for medical advice or treatment from a personal physician. Regarding the interpretation of their medical test results and/or specific health questions, it is recommended that all readers and viewers consult their physicians or other qualified health professionals. The publisher is not responsible for any adverse health effects that may result from reading or following the information in this educational content. Before beginning any nutrition, supplement, or lifestyle program, all viewers, especially those taking prescription or over-the-counter medications, should consult their physician or health care practitioner.
Please note that while prominent lab names are included in this content, we cannot guarantee that these labs offer all the tests mentioned. For confirmation, individuals should contact the labs directly or consult their medical practitioners. The information provided reflects general knowledge at the time of publication and may not include recent updates or emerging research. Readers should verify details with qualified professionals to ensure the most up-to-date and accurate guidance.
[1] Niedermeyer E, da Silva FL. Electroencephalography: Basic Principles, Clinical Applications, and Related Fields.Lippincott Williams & Wilkins; 2005.
[2] Berger H. Über das Elektrenkephalogramm des Menschen. Arch Psychiatr Nervenkr. 1929;87(1):527-570.
[3] Niedermeyer E. The clinical relevance of electroencephalography in diagnosing neurological conditions. Neurol Clin.1996;14(2):447-469.
[4] Hughes JR. The development of EEG and its use in diagnosing epilepsy and related disorders. Epilepsy Behav.2004;5(2):50-55.
[5] Sanei S, Chambers JA. EEG Signal Processing. John Wiley & Sons; 2007.
[6] Klass DW, Westmoreland BF. Nonepileptogenic epileptiform electroencephalographic activity. Ann Neurol.1985;18(5):627-635.
[7] Niedermeyer E. Epileptic seizure disorders and EEG. Clin Electroencephalogr. 1983;14(3):138-153.
[8] Pedley TA, Traub RD. Physiological basis of the EEG. Epilepsia. 1984;25(3):329-343.
[9] Hughes JR, John ER. Conventional and quantitative electroencephalography in psychiatry. J Neuropsychiatry Clin Neurosci. 1999;11(2):190-208.
[10] Coben R, Hammond DC, Hudspeth WJ. Neurofeedback for autism spectrum disorder: a review of the literature. Appl Psychophysiol Biofeedback. 2014;39(2):83-103.
[11] Duffy FH, Hughes JR. History and application of EEG in psychiatry. Am J Psychiatry. 1979;136(10):1147-1153.
[12] Michel CM, Murray MM, Lantz G, Gonzalez S, Spinelli L, Grave de Peralta R. EEG source imaging. Clin Neurophysiol. 2004;115(10):2195-2222.
[13] Lopes da Silva FH, Van Rotterdam A, Barts P, van Heusden E, Burr W. Models of neuronal populations: The basic mechanisms of rhythmicity. Prog Brain Res. 1976;45:281-308.