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Communication disorder

A communication disorder is a disease or condition that partially or totally prevents human communication. The defect can be in producing, receiving or understanding the communication.

Examples of communication disorders:

autism -- a developmental defect that affects understanding of emotional communication
aphasia -- loss of the ability to produce or comprehend language
blindness -- a defect of the eye or visual system
deafness -- a defect of the ear or auditory system
dyslexia -- a defect of the systems used in reading
speech disorders such as
- stuttering
- oesophageal voice
etc