Comparison of human vocal cord movements during isocapnic hypoxia and hypercapnia
| Autor: | D. Bartlett, S. J. England, S. L. Knuth |
|---|---|
| Rok vydání: | 1982 |
| Předmět: |
Adult
Glottis Cord Physiology Movement Peripheral chemoreceptors Stimulation Vocal Cords Hypercapnia Physiology (medical) Tidal Volume medicine Humans Respiratory system Hypoxia Air breathing business.industry Respiration Carbon Dioxide respiratory system Hypoxia (medical) respiratory tract diseases Anesthesia medicine.symptom business Glottic narrowing circulatory and respiratory physiology |
| Zdroj: | Journal of Applied Physiology. 53:81-86 |
| ISSN: | 1522-1601 8750-7587 |
| DOI: | 10.1152/jappl.1982.53.1.81 |
| Popis: | Respiratory vocal cord movements were analyzed in healthy human subjects during air breathing and in isocapnic hypoxia and hypercapnia. In the majority of experiments, expiratory glottic narrowing was substantially greater during hypoxia than during hypercapnia. Because ventilations were carefully matched under these two conditions, it is concluded that hypoxic stimulation of peripheral chemoreceptors favors expiratory glottic narrowing and leads to a relatively high laryngeal airflow resistance. In contrast, hypercapnia is accompanied by low expiratory laryngeal resistance. Similar rates of expiratory airflow with these two stimuli must be achieved by different balances of the factors that determine this flow. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|