Veratrine is a mixture of alkaloids, primarily veratridine and cevadine, obtained from the seeds of various plants of the genus Schoenocaulon (formerly Veratrum), known to stimulate sodium channels in nerve membranes, leading to depolarization and prolonged action potentials.
Reflex
An involuntary movement or exercise of function in a part, excited in response to a stimulus applied to the periphery and transmitted to the brain or spinal cord.