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Lichtheim's sign in aphasia

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A phenomenon seen in subcortical motor aphasia. The patient is unable to speak but can indicate with his fingers the number of syllables in the word of which he is thinking. This is called Lichtheim’s sign.


  • L. Lichtheim:
    Ueber Aphasie. Aus der medicinischen Klinik in Bern.
    Deutsches Archiv für klinische Medicin, Leipzig, 1885, 36: 204-268.
    English translation:
  • On aphasia. Brain, Oxford, January 1885, 7: 433-484.

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