Description of the ventilation movements

Ventilation is the result of a whole of movements.

Inspiration

Rising of the wings of the nose; visible only in the infant. Increase in the capacity of nasal fossae.
dilation glottis (observation with the laryngoscope), of trachea, and of the bronchi. Increase in their gauge to the inspiration.
Certified copy thoracic, increase in the volume of thorax in its three dimensions during the inspiration.
Light vertical increase descent of the phrenic center and a flatness of the cupolas diaphragmatic.
Transverse increase and antéropostérieure are due to the coasts. With the inspiration, there is stretching on the coasts; any costal movement of rise involves projection in front of the sternale end of the coasts.
Increase in the diameter anteroposterior, as well as projection apart from convexity side of the coasts, which involves an increase in the transverse diameter.
Increase in dimension transversal with the inspiration of dimension antéropostérieure of the coasts with inspiration.

With the expiration the coasts are projected downwards and ahead

protrusion abdominal is a displacement in front of the former part ofabdomen when it diaphragm goes down, it contracts and drives back the internal organs forwards. Thus during the inspiration one observes a light abdominal protrusion.

Expiration

Even phenomena in opposite direction:

flatness of the wing of the nose (infant)
reduction in the gauge of the glottis (of the larynx)
reduction in the gauge of the trachea
reduction in the gauge of the bronchi : phenomenon unfavourable at the organization bus the reduction in these gauges is an obstacle at the exit of air.
reduction in the certified copy thoracic: the coasts go down.
diaphragmatic cupolas go up and involve a reduction in abdominal protrusion.

During this respiratory phase, one observes no contraction of ventilation muscle.

Forced ventilation

Inspiration : even phenomenon that during normal breathing but with larger amplitudes. The diaphragm goes down low. The coasts are drawn.

Expiration : there is contraction of muscles to support it. The muscles draw, in an active way, the coasts to the bottom and flatten the abdominal wall while making go up the abdominal mass upwards. The diaphragm also goes up towards the top involving an increase in volume of the rib cage and the rejection of the surface.

At dyspneic (large smoker) , it is necessary to learn how on the subject to breathe: to learn how to push the belly forwards (respiratory rehabilitation).