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Earlier we offered the theory of speech rhythm with Feigenbaum's scenario for route to chaos. Now we use the simple model of control parameter dynamics representing «inhibition» in neural system. This dynamics performs some limit cycle in coordinates: «inhibition» and «excitation. Different cycle positions in both chaos zone and bifurcation zones explains two different forms of the stutterers' speech as well as the existence of mixed form of adolescent age.Introduction. The problem of two forms of fluency disorders arose long ago. In Russian scientific literature the first type is named as «real stuttering» [1], but the second type revealing itself in the form of stuttering speech although, frequently, especially in Moscow school, refers to another nosological form, so named «stumbling» form. Usually this form is associated with disorders of attention [2].In Petersburg school these two forms refer to stuttering, but the stuttering is divided on «stuttering of development» and "stuttering in chronic form" due to the external manifestations of the fluency disorders.The chronic form of stuttering are usually associated with more adult patients. Fluency disorders of the «chronic» form have usually more complex structure than at a stuttering of development. They frequently appear together with fear of speech. In more severe cases these hesitations are followed by logophobia, when stutterer could not begin speech process on the whole. Patients' speech, as a rule, is inhibited due to exaggerated attention to fluency disorders in their own speech.Development form is associated usually with numerous serial stumbles of mixed tono -clonic type, as a rule. This form is accompanied frequently by both disorders of the speech breathing and spasms in glottis. Patients, as a rule, don't pay attention to these stumbles in the own speech. Sometimes, at the favorable outcomes the development form of fluency disorders disappear automatically, sometimes, at the unfavorable outcomes this form evolves in age into chronic form of stuttering.In English-language literature these two forms are united by general term «fluency disorders» and being taken separately the chronic form is named as «stuttering» and the development form is named as «cluttering» [3]. D.A. Weiss identified the cluttering as the primary form of the stuttering [4]. He advanced the interesting hypothesis that the stuttering essentially always has its onset as a reaction of effort or struggle for the purpose of overcoming cluttering. But later Langova and Mo-

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Cited by 4 publications

References 11 publications

Chaos and speech rhythm

Chaos and speech rhythm

Robust rhythm as a consequence of the universal description of complex system dynamics in the vicinity of critical point

Yakhno-Fitzhugh model of the control parameter in feigenbaum scenario for speech rhythm

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