A Study on Cricothyroid Muscle Activities During Carbon Dioxide Inhalation

Abstract

Several studies of the activity of human cricothyroid muscles during sleep have been reported. Eight adults in good health aged 36 to 61 years were subjected in this study. The activity of the cricothyroid muscle was investigated during sleep and the influence of carbon dioxide inhalation upon the cricothyroid activity was electromyographically determined. During sleep, a slight degree of cricothyroid activity was observed for inspiration. Carbon dioxide inhalation caused an increase in the cricothyroid activity during inspiratory phases.