trachealis
trachealis muscle

Sewell also described the trachealis muscle of the horse.

The primary function of the trachealis muscle is to constrict the trachea, allowing air to be expelled with more force e.g. during coughing.

Key words: trachealis muscle, phosphodiesterase inhibitors, norepinephrine, carbamylcholine.

Canine trachealis muscle will shorten up to 70% of starting length from optimal length in vitro but will only shorten by around 30% in vivo.

The trachealis muscle joins the ends of the rings and these are joined vertically by bands of fibrous connective tissue, the annular ligaments of trachea.

The trachealis muscle is a smooth muscle that bridges the gap between the free ends of C-shaped cartilages at the posterior border of the trachea, adjacent to the esophagus.

The trachealis muscle connects the ends of the incomplete rings and contracts during coughing, reducing the size of the lumen of the trachea to increase the rate of air flow.

Measurement of the elastic loads applied by the tracheal cartilage to the trachealis muscle and by lung parenchymal recoil to smooth muscle of smaller airways were performed in canine preparations.

The relationships of the electrical to the mechanical responses of the canine trachealis muscle during stimulation of its cholinergic nerves or exposure to exogenous acetylcholine were recorded in the single or the double sucrose gap.