Mu L C, Yang S L
Liaoning Research Center of Logopedics and Phoniatrics, Department of Otolaryngology, Third Affiliated Hospital, China Medical University, Shenyang.
Laryngoscope. 1991 Aug;101(8):849-54. doi: 10.1288/00005537-199108000-00008.
The activity of the posterior cricoarytenoid muscle during respiration has been well investigated electromyographically. Its activity during phonation, however, has not been studied systematically. We, therefore, focused our attention on the phonatory activity of the posterior cricoarytenoid muscle to confirm whether it also contracts during phonation, as has been reported by some researchers. In our series of 12 adult dogs, the posterior cricoarytenoid was active in 11 dogs and inactive in one dog during phonation. Our present study also showed that the posterior cricoarytenoid activity was stronger for phonation than for inspiration in 6, stronger for inspiration than for phonation in 3, and the same for phonation and inspiration in 2 dogs. The results obtained from the present electromyographic evaluation demonstrated that the posterior cricoarytenoid is activated during phonation. The authors believe that the posterior cricoarytenoid muscle has phonatory function and that the phonatory effect of this muscle on the vocal cord may play an important role in precise glottis control.
环杓后肌在呼吸过程中的活动已通过肌电图进行了充分研究。然而，其在发声过程中的活动尚未得到系统研究。因此，我们将注意力集中在环杓后肌的发声活动上，以确认它在发声时是否也如一些研究人员所报道的那样收缩。在我们的12只成年犬系列中，发声时环杓后肌在11只犬中活跃，在1只犬中不活跃。我们目前的研究还表明，6只犬发声时环杓后肌的活动比吸气时更强，3只犬吸气时比发声时更强，2只犬发声和吸气时相同。本次肌电图评估获得的结果表明，发声时环杓后肌被激活。作者认为环杓后肌具有发声功能，并且该肌肉对声带的发声作用可能在精确的声门控制中起重要作用。
