The Supra Orbital Artery arises at the upper surface of the optic nerve, and accompanies the nerve of the same name to the notch in the superior margin of the orbit. In this course it lies on the superior rectus and levator palpebrae muscles, beneath the periosteum, and on the inside of the supra-orbital nerve. It supplies the levator palpebrae and superior rectus muscles; and as it passes through the notch in the superciliary arch, it gives a branch to the diploe of the frontal bone. It then divides into two principal branches, of which the internal is the larger : these subdivide into many others, which supply the occipito-frontalis muscle, and anastomose with the angular artery inferiorly, and with the temporal artery superiorly.