The anterior extremity of the Parahippocampal gyrus is recurved in the form of a hook, the uncus, which is separated from the apex of the temporal lobe by a slight fissure, the incisura temporalis. Although superficially continuous with the hippocampal gyrus, the uncus forms morphologically a part of the rhinencephalon. The term uncus was coined by Felix Vicq dbAzyr (1748b1794). [ http://en.wikipedia.org/wiki/Uncus ]