superciliary arch

The frontal sinuses are situated behind the superciliary arches.

Typically, the superciliary arches are more prominent in monkeys than in humans, and more in men than in women.

Superciliary arch and nose are very pronounced, the eyes are sunken and symbolically rendered by two concentric circles; the mouth is incised with a short stroke, linear or angular.

Beneath each superciliary arch is a curved and prominent margin, the supraorbital margin, which forms the upper boundary of the base of the orbit, and separates the squama from the orbital portion of the bone.

Below the frontal eminences, and separated from them by a shallow groove, are two arched elevations, the superciliary arches; these are prominent medially, and are joined to one another by a smooth elevation named the glabella.

It arises from the medial end of the superciliary arch; and its fibers pass upward and laterally, between the palpebral and orbital portions of the orbicularis oculi muscle, and are inserted into the deep surface of the skin, above the middle of the orbital arch.