Studies on Respiratory Movements

III. Stability of Respiratory Movements

Abstract

Respiration is regulated voluntarily and involuntarily, which makes respiratory movements very complicated. In the first and second reports, the author found the fact that the respiratory type of larger part of Japanese was abdominal. But owing to the complication of respiratory movements, further research was needed in the same sub. jects experimented in winter and summer. Thus following results were obtained.
1. Seasonal changes of respiratory type were little. Especially in supine position no remarkable change was seen.
2. In summer the percentage of costal type of young women increased.
3. Respiratory movements of chest were more stable than that of abdomen. Stability of respiratory movements increased with age.
4. Abdominal type of respiration was found in larger part of Japanese. Especially in supine position, most subjects respired in abdominal type, indifferent of sex and age.
5. Respiratory patterns of each subject were fairly stable.