Kojima H, Omori K, Shoji K, Honjo I, Isshiki N, Nakamura T, Shimizu Y
Department of Otolaryngology, School of Medicine, Kyoto University, Japan.
Arch Otolaryngol Head Neck Surg. 1990 Jan;116(1):74-8. doi: 10.1001/archotol.1990.01870010078022.
In an attempt to remobilize a unilaterally paralyzed vocal cord, experiments were made in five adult dogs. Adduction of the paralyzed vocal cord for phonation in synchrony with the intact cord was achieved by electrical stimulation of the adductor muscles that was triggered by the signals from the cricothyroid muscle. The difference in the level of action potentials of the cricothyroid muscle between during phonation and during respiration was used for setting the threshold so as to differentiate phonation from respiration. Nearly synchronous movement of the two vocal cords thereby attained during phonation greatly improved the voice quality that was hoarse without the paced stimulation.
为了使单侧麻痹的声带重新活动起来，对五只成年犬进行了实验。通过对由环甲肌信号触发的内收肌进行电刺激，使麻痹的声带与正常声带同步内收以用于发声。利用发声时和呼吸时环甲肌动作电位水平的差异来设置阈值，以便区分发声和呼吸。由此在发声时实现的两条声带几乎同步运动，极大地改善了原本在无同步刺激时嘶哑的嗓音质量。
