Kalveram, K.Th. (1991a) How pathological audio-phonatoric coupling induces stuttering. A model of speech flow control. In H.F.M. Peters, A. Hulstijn & C.W. Starkweather (Hrsg.), Speech Motor Control and Stuttering. 163-170. Amsterdam: Elsevier Scientific Publishers.
Abstract
A model of speech flow control is proposed, constructed around a 'central pattern generator' (CPG) inducing the vowel related phonation of the syllables. Other phoneme generating articulators, e.g. jaw, lips, tongue, are supposed to be driven by slave CPGs governed by the phonation CPG. In this model, the 'audio phonatoric coupling' (APC) represents a feedforward, errorcorrecting mechanism, that influences the timing of the phonation CPG. A computer simulation shows that the model iterates syllables and/or phonemas, (a) if an integrating interface controlling the phonation length has been set (e.g. at the beginning of speaking) to a value too low too reach phonation threshold, or (b) if APC has been switched on prematurely (i.e. at the unstressed syllable preceeding the stressed one). Experimental evidence exists, that stutterers apply APC in just this way (Jäncke, 1990).

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