What does the supraorbital margin of the frontal bone form?
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.
What is a supraorbital margin?
The supraorbital ridge, also known as the supraorbital margin or superciliary arch is the superior margin of the bony orbit. Part of the frontal bone, the supraorbital ridge contains the supraorbital foramen (or notch). The corrugator supercilii muscles arise from the medial end of the supraorbital ridge 1.
What bones makes up the supraorbital margin?
Supra-orbital margin – the frontal bone. Medial margin – the frontal process of the maxilla. Infra-orbital margin – the zygomatic process of the maxilla, and the zygomatic bone.
Where is the supraorbital margin?
The supraorbital margin forms the upper boundary of the anterior open end (base) of the orbit and separates the frontal squama from the orbital portion of the frontal bone.
What is margin between squamous and orbital parts of frontal bone?
The bone consists of two portions. These are the vertically oriented squamous part, and the horizontally oriented orbital part, making up the bony part of the forehead, part of the bony orbital cavity holding the eye, and part of the bony part of the nose respectively….
|Anatomical terms of bone|
What is the margin of a bone?
Margin – The edge of any flat bone. It can be used to define a bone’s borders accurately. For example, the edge of the temporal bone articulating with the occipital bone is called the occipital margin of the temporal bone.
How many frontal bones are there?
The frontal bone is a bone in the human skull. The bone consists of two portions….
|Articulations||Twelve bones: the sphenoid, the ethmoid, the two parietals, the two nasals, the two maxillæ, the two lacrimals, and the two zygomatics|
What bones form the margins of the orbit?
Medially, the orbital wall consists of the frontal process of the maxilla, the lacrimal bone, the sphenoid, and the thin lamina papyracea of the ethmoid. The lateral wall is formed by the lesser and greater wings of the sphenoid and the zygoma.
What is the bone in your forehead called?
The Cranium The frontal bone forms the forehead. The two parietal bones form the upper sides of the skull; the two temporal bones form the lower sides.
How strong is the forehead bone?
In comparing the impact strength of three facial bones on each of four cadavers, the frontal bone has been found to tolerate a force three or four times higher than the mandible and zygomatic bone which are about equal.