In this presentation we report on an adult male participant suffering from a rare form of cortical anarthria and exhibiting progressive speech degeneration. We present acoustic phonetic data on his vowel and consonant production, and description of his prosody and syllable structure. We concentrate on a series of unusual speech patterns: including addition of /l/ to final high back rounded vowels, denasalization of target nasal stops, addition of labial consonants to word initial /r/, and loss of VOT constrasts towards the values for lenis plosives. There was also a differential treatment of onset and coda clusters in that onset clusters were normally realized correctly (except for plosive+/r/ where an epenthetic schwa was often inserted), whereas coda clusters were often simplified by the addition of schwa. Schwa was also often added to final singletons, suggesting a reorganization of syllable structure to avoid final C(s).
We suggest possible phonological analyses of his speech, concluding that a gestural approach to phonology best characterizes his speech production and its degeneration.