Aphonia

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					Aphonia
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Aphonia is the inability to speak. It is considered more severe than dysphonia. A                                     Aphonia
primary cause of aphonia is bilateral disruption of the recurrent laryngeal nerve,
                                                                                                     ICD-10             R49.1
which supplies nearly all the muscles in the larynx. Damage to the nerve may be
the result of surgery (e.g., thyroidectomy) or a tumor.                                              ICD-9              784.41

                                                                                                     MeSH               D001044
Aphonia means "no sound." In other words, a person with this disorder has lost
his/her voice.

            Contents
 1 Psychogenic aphonia
 2 Causes
 3 See also
 4 External links


Psychogenic aphonia
Psychogenic aphonia is often seen in patients with underlying psychological problems. Laryngeal examination will show
usually bowed vocal folds that fail to adduct to the midline during phonation. However, the vocal folds will adduct when the
patient is asked to cough. Treatment should involve consultation and counseling with a speech pathologist and, if necessary,
a psychologist.
In this case, the patient's history and the observed unilateral immobility rules out functional aphonia.

Causes
There are many reasons why this may happen. Injuries seem to be the cause of aphonia rather frequently; minor injuries can
affect the second and third dorsal area in such a manner that the lymph patches concerned with coordination become either
atrophic or relatively nonfunctioning. Tracheotomy can also cause aphonia.
Basically, any injury or condition that prevents the vocal cords, the paired bands of muscle tissue positioned over the trachea,
from coming together and vibrating will have the potential to make a person unable to speak. When a person prepares to
speak, the vocal folds come together over the trachea and vibrate due to the airflow from the lungs. This mechanism
produces the sound of the voice. If the vocal folds cannot meet together to vibrate, sound will not be produced. Aphonia can
also be caused by and is often accompanied by fear.

See also
      Mute

External links
      Muscle Tension Aphonia Video Example
      [1]

  V   · T· E·               Symptoms and signs: Speech and voice / Symptoms involving head and neck (R47–R49 , 784)
                                   Expressive aphasia · Receptive aphasia · Conduction aphasia · Anomic aphasia · Global aphasia ·
                 Acute Aphasias
                                   Transcortical sensory aphasia · Transcortical motor aphasia · Mixed transcortical aphasia

            Progressive Aphasias   Progressive nonfluent aphasia · Semantic dementia · Logopenic progressive aphasia

                                   Speech disorder · Apraxia of speech · Auditory verbal agnosia · Dysarthria · Schizophasia ·
  Other speech disturbances        Aprosodia/Dysprosody
                            Specific language impairment · Thought disorder · Pressure of speech · Derailment · Clanging · Circumstantiality
                            Developmental dyslexia/Alexia · Agnosia (Astereognosis, Prosopagnosia, Visual agnosia) ·
    Symbolic dysfunctions   Gerstmann syndrome ·
                            Developmental dyspraxia/Apraxia (Ideomotor apraxia) · Dyscalculia/Acalculia · Agraphia

       Voice disturbances   Dysphonia/Aphonia

                    Other   Auditory processing disorder · Epistaxis · Headache · Post-nasal drip · Neck mass

       M: PSO/PSI                         mepr                    dsrd (o, p, m, p, a, d, s),                 proc(eval/thrp),
                                                                       sysi/epon, spvo                  drug(N5A/5B/5C/6A/6B/6D)

         M: MOU                            anat/devp                   noco/cofa(c)/cogi/tumr, sysi             proc (peri), drug (A1)



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posted:9/20/2012
language:English
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