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Respuesta auditiva provocada del tronco encefálico (BAER) - Overview

Nombres alternativos

Potenciales provocados auditivos; Potenciales provocados auditivos del tronco del encéfalo; Audiometría de respuesta evocada; Respuesta auditiva troncoencefálica; RAT; PEAT

Definición:

Es un examen para medir la actividad de las ondas cerebrales que ocurre en respuesta a clics (chasquidos) o ciertos tonos.

Forma en que se realiza el examen:

Usted se acuesta en una silla o una cama reclinable y permanece quieto. Se colocan electrodos sobre el cuero cabelludo y en cada lóbulo de la oreja. Los audífonos emiten un breve clic o tono. Los electrodos captan las respuestas cerebrales a estos sonidos y las registran. No se necesita estar despierto para este examen.

Preparación para el examen:

A usted se le puede solicitar lavarse el cabello la noche antes del examen.

Los niños pequeños a menudo requieren algún tipo de sedación (medicamento para relajarlos), de manera que permanezcan calmados durante el procedimiento.

Razones por las que se realiza el examen:

El examen se realiza para:

  • Ayudar a diagnosticar problemas del sistema nervioso e hipoacusia (especialmente en recién nacidos y niños)
  • Determinar qué tan bien funciona el sistema nervioso

Este examen también se puede llevar a cabo durante la cirugía para disminuir el riesgo de lesión al nervio auditivo y al cerebro.

  • Reviewed last on: 8/3/2010
  • Linda J. Vorvick, MD, Medical Director, MEDEX Northwest Division of Physician Assistant Studies, University of Washington, School of Medicine; Seth Schwartz, MD, MPH, Otolaryngologist, Virginia Mason Medical Center, Seattle, Washington. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

Referencias

Brown CJ, Johnson TA. Electrophysiologic assessment of hearing. In: Cummings CW, Flint PW, Haughey BH, et al, eds. Otolaryngology: Head & Neck Surgery. 5th ed. Philadelphia, Pa: Mosby Elsevier; 2010:chap 134.

Emerson RG, Pedley TA. Clinical neurophysiology: Electroencephalography and evoked potentials. In: Bradley WG, Daroff RB, Fenichel GM, Jankovic J, eds. Neurology in Clinical Practice. 5th ed. Philadelphia, Pa: Butterworth-Heinemann; 2008:chap 35A.

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