The subject of this contribution to the knowledge of reflexes is not the discovery of a new reflex or a new modification of an old one. On the contrary, the reflex at issue was described for the first time as far back as 1896 in the Lancet by W. Overend, who called it the “frontal reflex.” As has often happened with many other reflexes, it was overlooked and rediscovered many times after, and each of the authors gave to it another name. However, in spite of all these numerous contributions its practical clinical value remained of no importance, and it is scarcely mentioned in text-books dealing with nervous disorders.