Imbalance of the Vocal Cords as a Factor for Dysphonia

Abstract

The effect of various imbalance of the vocal cords was investigated in dog through the use of a high speed camera. Within the limit of our experimental procedure, the two vocal cords asymmetrical in mass or tension vibrated at the same frequency. Experimental evidence and clinical experiences indicated that imbalance between the glottal condition and expiratory air flow could be an important factor in the etiology of functional dysphonia or aphonia.