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Dejerine's hand-bow phenomenon

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A not commonly used term for the so-called hand-flexion reflex. A strike with the reflex hammer on the tendons of the hand flexor on the volar side of the lower arm at retinaculum flexorum (lig. carpi transversum) or higher, during which the hand is lightly supported by the investigator, causes the hand- and finger flexors to react by contracting. This reflex is greatly increased in diseases of the pyramid tract. It is not constantly present, however, and also occurs in healthy persons.


  • J. J. Dejerine:
    Sémiologie des affections du systéme nerveux.
    Paris, 1926. Page 946.

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