Aphonia
Aphonia (aphonia; a- - neg. Part + Greek. Phone - voice, sound) - lack of sonority of the voice, while whispered speech is preserved.
The following types of aphonia are distinguished:
- Laryngeal (laryngea; synonym: true aphonia) - caused by the lack of complete closure or sufficient vibration of the vocal folds against the background of organic lesions of the larynx (cicatricial changes, tumors, etc.);
- Leprosy (leprosa) - laryngeal aphonia with leprosy; develops due to cicatricial changes in the larynx;
- Paralytic (paralytica) - caused by paralysis of the muscles of the larynx (in most cases, one-sided), innervated by the lower laryngeal nerve, with its diseases or injuries, as well as against the background of syringomyelia or syringobulbia;
- Psychogenic (psychogena) - caused by mental trauma or the affect of fear;
- Syphilitic (syphilitica) - laryngeal aphonia with secondary syphilis; due to the appearance of syphilis on the mucous membranes of the vocal folds;
- Functional (functionalis) - characterized by incomplete closure of the vocal cords in the absence of pathological disorders in the larynx; observed against the background of neurotic conditions.
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