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This is a disorder of written language which is part of the dyslexic syndrome.
It is characterised by major spelling mistakes during the production of written language, such as confusions, omissions or inversions of letters and syllables, errors of conjugation, and arbitrary word breaks. These errors are habitual during the learning period of reading and writing in a child. The problem in the dyslexic/dysorthographic child is that of their abnormal persistence.

For Tomatis, access to the correct orthographic form of the word is compromised due to a lack of automation (Tomatis uses the term 'integration') of the recognition of the written form of words.
This lack of automation at the same time derives from a deficit of the system which analyses the sounds of speech, (the process whereby sounds are categorised into phonemes is compromised) and a dysfunction of the circuits linking the cochlea and the vestibule and involving the cerebellum which is a capital structure for the establishment of the automation procedures of the motor and cognitive learning processes.

The perfect illustration of this disorder is that of the child who will constantly make the same spelling mistakes in spite of the fact that he or she has been corrected countless times by teachers or family members.
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