It is a site of muscle attachment for muscles including sternocleidomastoid, splenius capitis, and longissimus capitis. It can easily be felt on the side of one’s head, behind the earlobe. It is a pyramidal projection at the back of the temporal bone. Together these form the zygomatic arch, the cheekbone. It connects to the temporal process of the zygomatic bone. There are many features of the temporal bones. The temporal bones are the lower lateral sides of the skull as seen below in green. The superior and inferior temporal lines are low ridges that mark the attachment sites of the temporalis muscle. The parietal bones articulate with one another, and with the frontal, sphenoid, temporal, and occipital. It forms the upper lateral side of the skull. The parietal bones, the right parietal bone highlighted in green below, make the roof of the cranium. The zygomatic process of the frontal bone connects with the frontal process of the zygomatic bone which help form the cheekbone. The smooth part above and between your eyebrows has a name and is called the glabella. Supra meaning superior, orbital meaning eye socket, and foramen meaning hole the name of the describes what it is and where it is. It has supra-orbital foramina, sometimes a notch, above each supra-orbital margin that allow blood vessels and nerves to reach the eyebrows, eyelids, and frontal sinuses. The supra-orbital margin is the superior, upper, rim of the eye socket. The shape of the frontal bone plays a big part in the visual identity of a person. It articulates (is connected to) with the parietal, sphenoid, ethmoid, nasal, lacrimal, maxillary, and zygomatic bones. The frontal bone, as seen below in pink, is the anterior roof of the skull, the bone of the forehead, and extends down to be the superior portion of the orbits, the top of the eye sockets. The squamous sutures connect the parietal bones to the temporal bones. The lambdoid connects the two parietal bones to the occipital bone. The sagittal suture connects the two parietal bones. The frontal suture connects the frontal bone to the two parietal bones. There are four major sutures that connect the bones of the cranium together: the frontal or coronal, the sagittal, the lambdoid, and the squamous. A suture is an synarthrosis joint, an immoveable joint, between the bones and is how the bones of the cranium are connected. The cranium is composed of eight bones: the frontal bone, two parietal bones, two temporal bones, the occipital bone, the sphenoid bone, and the ethmoid bone. The cranial bones form the cranial cavity which holds and protects the brain. The adult skull is made up of 22 bones 21 of them are immovable and the 22 nd one is the mandible, the lower jaw, and is the only moveable bone of the skull. It is comprised of the cranium, which is round and houses the brain, and the facial bones which form the upper and lower jaws, the nose, orbits, and other facial structures. The skull is part of the axial skeleton and is divided into the two sections: the facial bones and the cranium. Skull, head, cranial vault, dome, noodle, and thinker are all words that are used to describe the same thing: the cranium.
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