Pulmonary plexus

Pulmonary plexus is a network of nerves that provides innervation to the lungs. It is formed by the vagus nerve and the sympathetic trunk, and is divided into an anterior and a posterior plexus. The plexus contains both sensory and motor fibers, which regulate the functions of the lungs and bronchi, such as the dilation and constriction of the bronchial muscles and the secretion of mucus.

Structure

The pulmonary plexus is located in the chest, near the root of the lung. It is formed by the vagus nerve and the sympathetic trunk. The plexus is divided into an anterior and a posterior plexus, which wrap around the root of the lung.

The anterior plexus is smaller and is located in front of the root of the lung. It is formed by branches from the vagus nerve and the sympathetic trunk.

The posterior plexus is larger and is located behind the root of the lung. It is formed by branches from the vagus nerve and the sympathetic trunk.

Function

The pulmonary plexus contains both sensory and motor fibers. The sensory fibers provide sensation to the lungs and bronchi, while the motor fibers regulate the functions of the lungs and bronchi.

The motor fibers cause the dilation and constriction of the bronchial muscles, which control the flow of air into and out of the lungs. They also regulate the secretion of mucus, which helps to keep the airways moist and trap foreign particles.

The sensory fibers provide sensation to the lungs and bronchi, allowing the body to respond to changes in the respiratory system. For example, if the airways become inflamed or irritated, the sensory fibers will send signals to the brain, which can trigger a cough or other response.

Clinical significance

Damage to the pulmonary plexus can cause a variety of symptoms, depending on the extent and location of the damage. These can include difficulty breathing, coughing, and chest pain. In severe cases, damage to the pulmonary plexus can lead to respiratory failure.

See also

• Vagus nerve
• Sympathetic trunk
• Respiratory system

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