Abstract
Two talkers produced utterances that contained one of three classes of voiceless stops (unaspirated, aspirated, and glottalized stops), and simultaneous electromyographic recordings were obtained from three intrinsic laryngeal muscles (interarytenoid, lateral cricoarytenoid, and vocalis). During the production of unaspirated and aspirated stops, the interarytenoid and vocalis act in concert, inactive for the voiceless closure interval and active for voice onset following stop release. Both are markedly suppressed during closure for aspirated stops, and their activity rises (sharply in the case of the interarytenoid) for subsequent voice onset. The lateralis is uniformly inactive throughout closure and release of these two categories. By contrast, it is lateralis and vocalis that act in parallel for ejectives: a marked peak occurs in lateralis and vocalis activity during the voiceless closure interval, presumably for achievement of tight glottal closure. The interarytenoid is inactive during oral closure for ejectives and becomes active only as lateral cricoarytenoid and vocalis activity subsides following oral release. [Work supported in part by NINCDS and NIDR.]
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