[An investigation of glottic movement and vocal cord evoked electromyography following unilateral cricoarytenoid joint injuries in rabbits].

The unilateral cricoarytenoid joints of rabbits were bluntly injured. Observations on glottic movement and vocal cord evoked electromyography were performed. The results confirm that injury of the cricoarytenoid joint always causes disturbances in ipsilateral vocal cord movement. But the evoked electrical activities of the ipsilateral vocal cord muscles were normal not only in acute stage but also in chronic stage. The above results may provide the experimental basis for clinical differentiation of disturbances in glottic movement.