Larin reflex

The Larin reflex is an unconditioned reflex consisting of contraction of the larynx and closing of the glottis in response to irritation of the posterior pharyngeal wall. This reflex is named after the Russian physiologist Ivan Romanovich Tarkhanov, who first described it in 1911.

The Larin reflex is a protective mechanism that prevents foreign bodies and liquids from entering the respiratory tract. When coughing, vomiting or eating, irritation of the receptors in the back of the pharynx causes a reflex contraction of the muscles of the larynx, which leads to the closure of the vocal cords.

This reflex is especially important for newborns, as they have not yet developed a cough reflex. The Larin reflex allows them to avoid aspiration during feeding.

Thus, the Larin reflex is an important protective mechanism of the airways, preventing their blockage and damage. It is named after the Russian scientist who first described it.