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Related Experiment Videos

Babinski sign.

H U Rehman1

  • 1Department of Medicine, Hull Royal Infirmary, Hull, UK. habib786@aol.com

The Neurologist
|June 14, 2003
PubMed
Summary

The Babinski sign reliably indicates central nervous system dysfunction, specifically pyramidal tract damage. This reflex remains a crucial diagnostic tool for neurologists despite medical advancements.

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Area of Science:

  • Neurology
  • Neuroscience
  • Clinical Medicine

Background:

  • The Babinski sign, described in 1896, is a well-established clinical reflex.
  • It is primarily associated with dysfunction of the pyramidal tract in the central nervous system.
  • Historically, its presence or absence has aided in differentiating neurological conditions.

Purpose of the Study:

  • To reaffirm the diagnostic utility of the Babinski sign in localizing central nervous system dysfunction.
  • To review the historical context and clinical significance of the Babinski reflex.
  • To discuss the neurophysiological basis and limitations of the Babinski sign.

Main Methods:

  • Review of historical medical literature and clinical observations.
  • Analysis of the neuroanatomical pathways involved in the plantar response.
  • Correlation of Babinski sign presentation with specific neurological lesions.

Main Results:

  • The Babinski sign, characterized by an extensor plantar response, reliably indicates pyramidal tract dysfunction.
  • The reflex is normally absent in adults but present in infants, and can transiently appear in conditions like epilepsy.
  • Exceptions include acute CNS lesions where temporary spinal motoneuron inexcitability may mask the sign.

Conclusions:

  • The Babinski sign remains a valuable and precise indicator of upper motor neuron lesions.
  • Understanding its neurophysiological basis and potential transient absences is crucial for accurate interpretation.
  • The reflex continues to be a cornerstone in neurological examination for diagnosing pyramidal tract compromise.

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