Synkinetic movement of the vocal fold in unilaterally paralyzed larynx

动物分为去神经支配（DNV）组和再神经支配（缝合线）组。DNV动物没有声带运动。缝合组部分动物出现联合运动，组内部分动物呼吸时出现微弱的生理运动。前者在吸入时肌电图上TA的恢复大于PCA，而后者在大多数亚组中吸入时PCA的恢复大于TA。缝线组神经纤维可能发生异常再生，导致视误导程度不同的VF联动。肌球蛋白重链IIA型的出现与联胞作用的存在无关。缝线组给予钙通道抑制剂，可促进再生过程中轴突的伸展，但未导致联动性的减少。

Two animal groups were made: denervation (DNV) and reinnervation (Suture) groups. DNV animals did not show vocal fold movement. Some of Suture group animals showed synkinesis and others in the group showed weak physiological movement during respiration. Greater electromyographic recruitment of TA than PCA was seen during inhalation in the former, while recruitment of PCA was greater than TA during inhalation in majority of the latter subgroup.Aberrant regeneration of nerve fibers in Suture group may have occurred, resulting in synkinesis of the VF depending on the degree of misdirection. Appearance of myosin heavy chain type IIA was not associated with the presence of synkinesis. Administration of Ca channel inhibitor, which facilitates axonal extension during regeneration, in Suture group did not result in decrease of synkinesis.