| aphonia | <clinical sign, neurology> Inability to produce speech sounds. Often due to a disease of the voice producing structures. See: alalia. (27 Sep 1997) |
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| aphonia paralytica | Aphonia due to paralysis of the vocal cords. Spastic aphonia, aphonia caused by spasmodic contraction of the laryngeal adductor muscles provoked by attempted phonation. (05 Mar 2000) |
| nonorganic aphonia | hysterical aphonia |