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Inverted Brachioradialis Reflex

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Inverted Brachioradialis Reflex
Inverted Brachioradialis Reflex
Inverted Supinator Reflex
Inverted supinator sign
  • Inverted Supinator Test
  • Inverted Supinator Sign
  • Inverted supinator reflex
  • Reverse brachioradialis reflex
  • Inverted radial reflex
  • Inverted radial periosteal reflex
  • Paradoxical brachioradialis reflex

Purpose

  • Evaluate for a lesion at the C6-C6 spinal cord level
  • First introduced by Babinski in 1910[1]

Description

  • Examiner places the patients pronated forearm on their forearm
  • Apply a series of quick strikes with the reflex hammer near the styloid process of the radius
  • Positive/ Abnormal response
    • Finger flexion
    • Elbow Extension
  • Negative/ Normal response
    • Wrist pronation
    • Elbow flexion

Pathology

Evidence

Lesion at C5-C6

  • De las Penas et al[2]
    • Sensitivity: 61%
    • Specificity: 78%

See Also

References

  1. ↑ Estanol, B. V., and O. S. Marin. "Mechanism of the inverted supinator reflex. A clinical and neurophysiological study." Journal of Neurology, Neurosurgery & Psychiatry 39.9 (1976): 905-908.
  2. ↑ de las Penas, Cesar Fernandez, Joshua Cleland, and Peter Huijbregts. Neck and arm pain syndromes. Elsevier, 2011.
Created by:
John Kiel on 12 July 2025 00:10:29
Authors:
Last edited:
4 January 2026 22:00:33
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