(XVII.) PNEUMOGRAPHY
Dep. of Physiology, Fac. of Medicine, MU, 2015 © Mohamed Al-Kubati


Anatomy of respiratory system
•Respiratory system
•Airways
•Upper airways
•Lower airways
•
•Lungs
•Respiratory muscles
•Inspiratory muscles
•Diaphragm
•External intercostal muscles
•Accessory inspiratory muscles
•Scalene and sternocleidomastoid muscles
•Expiratory muscles
•Internal intercostal muscles; abdominal muscles

Changes of intrapleural and intraalveolar pressure (related to atmospheric pressure) during
inspiration and expiration
Inspiration
•Active process – contraction of respiratory muscles
•Decrease of intrapleural pressure
•Decrease of intraalveolar pressure
•Due to pressure gradient, air flows into lungs
•
Expiration
•Passive process (quiet expiration) – elasticity of thoracic wall and lungs
•Increase of intrapleural and intraalveolar pressure
•Air flows out of lungs

Partial pressures of gases (mm Hg) in various
parts of the respiratory system and in the circulatory system


 Chemical control of breathing
•Chemoreceptors
•- Peripheral
•- Central
-
•- Changes of pCO2 (pH) or  pO2
•- Changes of activity of respiratory neurons

Equipment
- one/two respiratory belts for registration of respiratory movements
- PowerLab system
•Procedure
•Record:
•- Resting respiration (1 min)
•- Respiration after a mild exertion (5 squats – 10 breathing cycles)
•- Respiration after an intensive exertion (30 squats – 10 BC)

Ampl
Ti
Te
BI

Statistical analysis of obtained data
Choose two sets of data which will be analyzed
Follow the procedure in textbook