Skull Skull

Considering the vertical norm, norma verticalis, from the side of the convex (external) surface, it is not difficult to see that it consists of bones interconnected by sutures, suturae.

Connections are formed through connective tissue, syndesmosis.

Seams - one of the types of connection of bones. Bones involved in the formation of the cranial vault are joined by seams of various shapes. Some of them form a dentate line, others are even. A seam in the form of a dentate line - that a serrated suture, sutura serrata, and the joining of bones forming an even line - or a scaly seam, sutura squamosa, when the edge of one bone covers the edge of another bone like a fish scales, or a flat seam, sutura plana, when the edges The connecting bones are even and adjoin to each other (for example, the maxillary maxillary suture).

Sutures between the bones of the skull are often given the names of those bones that come into contact with one another.

Some seams of the cranial vault are named taking into account their direction or shape: coronal suture, sutura coronalis, - seam between the frontal and parietal bones; Sagittal suture, sutura sagittalis, - a seam between the parietal bones; Lambdoid suture, sutura lambdoidea, - seam between occipital and parietal bones .

In the process of ossification, certain unstable, small-sized bone sutures, ossa suturalia, are sometimes formed. More often they are found in the sagittal and lambdoid sutures. Less common intertemporal bone, os interparietale, replacing the upper corner of the occipital scales and located between the two parietal bones.
On the lateral surface of the arch, beneath the lower temporal line, a temporal area is determined, which goes downward to the temporal fossa bounded externally by the zygomatic process of the temporal bone .

The skull in its anterior part has a bulge - forehead, frons. In the posterior part of the arch, three protuberances can be noted: two lateral - parietal mounds, tubera parietalia, to the back - occiput, occiput. Between these three protuberances, the most prominent point of the arch is defined - the crown, or the tip, vertex.

The brain surface of the cranial vault has a number of irregularities that repeat the surface of the brain.

In addition, the cerebral vascular surface of the cranial vault bears vascular impressions: arterial furrows, sulci arteriosi, venous sulci venosi, and furrows of venous sinuses, the largest of the furrows passing along the median line of the cranial vault - the furrow of the superior sagittal sinus. Sulcus sinus sagittalis superioris. At the edges of this furrow are visible small, but deep impressions - the dimples of granulations, foveolae granulares, into which the outgrowths of the arachnoid membrane of the brain protrude. In addition to these impressions, in
The posterior sections of the sagittal groove have 2-3 nutrient holes, foramina nutricia. They are most often located not in the furrow itself somewhat away from its edges.

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