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Related Experiment Videos

[Physical diagnosis--plantar reflex].

J van Gijn1

  • 1Academisch Ziekenhuis, afd. Neurologie, Utrecht.

Nederlands Tijdschrift Voor Geneeskunde
|March 23, 1999
PubMed
Summary
This summary is machine-generated.

The Babinski sign, an extensor toe response, signals corticospinal tract disorders. Proper assessment requires observing toe movement and synergistic thigh muscle flexion.

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Area of Science:

  • Neurology
  • Neurophysiology

Context:

  • The Babinski sign, elicited by stimulating the plantar surface, is a key indicator of corticospinal system dysfunction.
  • Understanding the Babinski sign's mechanism involves recognizing the synergistic relationship between toe extension and leg flexion reflexes.

Purpose:

  • To clarify the neurophysiological basis of the Babinski sign.
  • To emphasize the importance of assessing associated flexion synergies for accurate diagnosis.

Summary:

  • Plantar stimulation eliciting toe extension, particularly the big toe (Babinski sign), signifies corticospinal tract damage.
  • This response results from disinhibition, recruiting the big toe into the leg's synergistic flexion reflex.
  • Accurate assessment necessitates observing both toe movement and concurrent thigh flexor muscle contraction.

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Impact:

  • Correct interpretation of the Babinski sign aids in diagnosing neurological disorders affecting the corticospinal system.
  • Highlighting the flexion synergy prevents diagnostic misunderstandings and improves clinical assessment accuracy.