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Electroencefalograma - Results

Nombres alternativos

Examen de las ondas cerebrales; Electroencefalografía (EEG)

Valores normales:

La actividad eléctrica del cerebro tiene un cierto número de ondas por segundo (frecuencias) que son normales para niveles diferentes de conciencia. Por ejemplo, las ondas cerebrales son más rápidas cuando uno está despierto y más lentas cuando uno está durmiendo.

Hay también patrones normales para estas ondas. El EEG busca estas frecuencias y patrones.

Significado de los resultados anormales:

Los resultados anormales en un EEG pueden deberse a:

Sangrado anormal (hemorragia).
Una estructura anormal en el cerebro (como un tumor cerebral).
Problemas de atención.
Tejido muerto debido a un bloqueo del suministro de sangre (infarto cerebral).
Alcoholismo o drogadicción.
Traumatismo craneal.
Migrañas (en algunos casos).
Trastornos convulsivos (como epilepsia o convulsiones).
Trastorno del sueño (como narcolepsia).
Inflamación del cerebro (encefalitis).

Nota: un EEG normal no significa que no ocurrió una crisis epiléptica.

El cerebro

Monitor de ondas cerebrales

Reviewed last on: 1/4/2011
Linda J. Vorvick, MD, Medical Director, MEDEX Northwest Division of Physician Assistant Studies, University of Washington, School of Medicine. Also reviewed by Joseph V. Campellone, MD, Division of Neurology, Cooper University Hospital, Camden, NJ. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

Referencias

Trescher WH, Lesser RP. The Epilepsies. In: Bradley WG, Daroff RB, Fenichel GM, Jankovic J, eds. Neurology in Clinical Practice. 5th ed. Philadelphia, Pa: Butterworth-Heinemann; 2008:chap 71.

Krumholz A, Wiebe S, Gronseth G, et al. Practice parameter: evaluating an apparent unprovoked first seizure in adults (an evidence-based review): report of the Quality Standards Subcommittee of the American Academy of Neurology and the American Epilepsy Society. Neurology. 2007;69(21):1991-2007.

Woo Lee J, Khoshbin S. Clinical neurophysiology and electroencephalography. In: Stern TA, Rosenbaum JF, Fava M, et al, eds. Massachusetts General Hospital Comprehensive Clinical Psychiatry. 1st ed. Philadelphia, Pa: Mosby Elsevier; 2008:chap 75.

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