Trachealis muscle | |
---|---|
Details | |
Nerve | Vagus nerve and upper thoracic spinal nerves |
Actions | Constricts trachea |
Identifiers | |
Latin | musculus trachealis |
TA98 | A06.3.01.005 |
TA2 | 3219 |
FMA | 7466 |
Anatomical terms of muscle |
The trachealis muscle is a sheet of smooth muscle in the trachea.
The trachealis muscle lies posterior to the trachea and anterior to the oesophagus. [1] It bridges the gap between the free ends of C-shaped rings of cartilage at the posterior border of the trachea, adjacent to the oesophagus. [1] [2] [3] This completes the ring of cartilages of the trachea. [3] The trachealis muscle also supports a thin cartilage on the inside of the trachea. [4] It is the only smooth muscle present in the trachea. [5]
The primary function of the trachealis muscle is to constrict the trachea, allowing air to be expelled with more force, such as during coughing. [2]
Tracheomalacia may involve hypotonia of the trachealis muscle. [6]
The trachealis muscle may become stiffer during ageing, which makes the whole trachea less elastic. [7]
In infants, the insertion of an oesophagogastroduodenoscope into the oesophagus may compress the trachealis muscle, and narrow the trachea. [8] This can result in reduced airflow to the lungs. [8] Infants may be intubated to make sure that the trachea is fixed open. [8]
Trachealis muscle | |
---|---|
Details | |
Nerve | Vagus nerve and upper thoracic spinal nerves |
Actions | Constricts trachea |
Identifiers | |
Latin | musculus trachealis |
TA98 | A06.3.01.005 |
TA2 | 3219 |
FMA | 7466 |
Anatomical terms of muscle |
The trachealis muscle is a sheet of smooth muscle in the trachea.
The trachealis muscle lies posterior to the trachea and anterior to the oesophagus. [1] It bridges the gap between the free ends of C-shaped rings of cartilage at the posterior border of the trachea, adjacent to the oesophagus. [1] [2] [3] This completes the ring of cartilages of the trachea. [3] The trachealis muscle also supports a thin cartilage on the inside of the trachea. [4] It is the only smooth muscle present in the trachea. [5]
The primary function of the trachealis muscle is to constrict the trachea, allowing air to be expelled with more force, such as during coughing. [2]
Tracheomalacia may involve hypotonia of the trachealis muscle. [6]
The trachealis muscle may become stiffer during ageing, which makes the whole trachea less elastic. [7]
In infants, the insertion of an oesophagogastroduodenoscope into the oesophagus may compress the trachealis muscle, and narrow the trachea. [8] This can result in reduced airflow to the lungs. [8] Infants may be intubated to make sure that the trachea is fixed open. [8]