Trachealis muscle

Trachealis muscle is a smooth muscle that bridges the gap between the free ends of C-shaped cartilages at the posterior wall of the trachea, adjacent to the esophagus. It plays a significant role in the respiratory system, particularly in the process of coughing and other reflexes.

Anatomy

The Trachealis muscle is a band of smooth muscle, located longitudinally along the last part of the trachea. It is found between the ends of the cartilage rings, connecting them posteriorly. The muscle is innervated by the Autonomic nervous system, specifically the parasympathetic and sympathetic divisions.

Function

The primary function of the Trachealis muscle is to constrict or narrow the trachea. This action is essential during coughing, as it increases the speed of airflow, helping to clear mucus and other substances from the airway. The muscle also plays a role in other reflexes, such as sneezing and vomiting.

Clinical significance

Abnormalities or diseases affecting the Trachealis muscle can lead to respiratory problems. For instance, in Asthma, the muscle can become hyperresponsive, leading to excessive constriction of the airways. This can cause difficulty breathing and other symptoms associated with the condition.

See also

• Trachea
• Respiratory system
• Smooth muscle