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Reflejo de Babinski - Overview

Nombres alternativos

Signo de Babinski; Reflejo plantar extensor

Definición:

Es un reflejo que ocurre cuando el dedo gordo del pie se mueve hacia la superficie superior del pie y los otros dedos se abren en abanico después de frotar firmementeque la planta del pie.

Este reflejo o signo es normal en niños muy pequeños, pero es anormal después de los 2 años de edad.

Consideraciones:

Los reflejos son respuestas predecibles e incontrolables a cierto tipo de estimulación.

El reflejo de Babinski es uno de los reflejos infantiles. Es normal en niños de hasta 2 años de edad, pero desaparece a medida que el niño crece y el sistema nervioso alcanza mayor desarrollo. Puede desaparecer al año de edad.

La presencia del reflejo de Babinski después de la edad de dos años es un signo de daño a las vías nerviosas que conectan la médula espinal y el cerebro (fascículo corticoespinal). Este fascículo baja por ambos lados de la médula espinal. El reflejo de Babinski puede ocurrir en uno o en ambos lados del cuerpo.

Un reflejo de Babinski anormal puede ser temporal o permanente.

  • Reviewed last on: 2/5/2011
  • David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by Joseph V. Campellone, MD, Division of Neurology, Cooper University Hospital, Camden, NJ. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

Referencias

Griggs R, Jozefowicz R, Aminoff M. Approach to the patient with neurologic disease. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 418.

Murray B, Mitsumoto H. Disorders of the upper and lower motor neurons. In: Bradley WG, Daroff RB, Fenichel GM, Jankovic J, eds. Bradley: Neurology in Clinical Practice. 5th ed. Philadelphia, Pa: Butterworth-Heinemann Elsevier; 2008:chap 78.

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