Viscerosecretory reflex

The viscerosensory reflex is a reflex of increasing the excitability of individual sensory nerve endings in organs and tissues with an increase in their blood supply. Accompanied by pain. It was first described by I.M. Sechenov in 1863, description by F.V. Ovsyannikov (1895).

When irritants act on internal organs, a slight expansion of the small vessels of their walls occurs, due, as with the chemoreceptor reflex, to an increase in blood flow to these organs, which leads to an increase in the tension formed in them and stretching of the nerve receptors. Since pain and temperature sensitivity is realized not only by specific nerves, but also by isolated non-meningeal areas of afferent nerve fibers, with the participation of the second nerve plexuses in these reflexes, a generalized increase in the excitability of specific nerve endings of individual internal organs occurs, extending to the receptors of the skin and mucous membranes .