Pulmonary Branches of the Sympathetic Trunk

pulmonary branches of the sympathetic trunk - (rami pulmonales, pna, bna, jna) arise from the posterior trunk of the sympathetic trunk and innervate the lungs. They regulate the contraction of the smooth muscles of the bronchi and bronchioles, as well as the blood vessels of the lungs.

Sympathetic innervation of the lungs carries out:

1. narrowing of the bronchi and bronchioles (bronchoconstriction)
2. narrowing of the pulmonary vessels (vasoconstriction)

These effects result in decreased pulmonary ventilation and pulmonary blood flow.

Thus, stimulation of the pulmonary branches of the sympathetic trunk leads to the functional “switching off” of parts of the lungs from breathing and blood circulation. This may be useful for localized lung injury to prevent the spread of infection.

The pulmonary branches of the Sympathetic trunk are a set of nerve fibers that are found in the human body and ensure the transmission of impulses between the respiratory and other systems of the body. The article will discuss the features of the pulmonary branches of the sympathetic trunk and their impact on health.

The sympathetic nervous system is an extensive network of fibers that transmits information from the brain to the internal organs. Sympathetic fibers connect with parasympathetic fibers in the medulla oblongata, where they