How many parietal bones are there?
Nov 28, 2022
Source: Cainiu Health
Dr. Lin Yunfei
Introduction
Anterior to the parietal bone is the frontal bone, and posterior to it is the occipital bone. Between the frontal and occipital bones lie the left and right parietal bones. Severe trauma may extend into the base of the skull. If the fracture extends to the skull base, it indicates a more serious injury, and intracranial complications must be evaluated. If there are intracranial problems, hospitalization is required. Avoid additional trauma or injuries such as new external injuries and infections.
There are two parietal bones in the human skull, as detailed below:
The parietal bone is a flat bone located between the frontal and occipital bones, in the middle part of the cranial vault, with one on each side. The junction between the two parietal bones is called the sagittal suture; that between the parietal and frontal bones is the coronal suture; the junction between the parietal and occipital bones is the lambdoid suture; and the articulation between the parietal and temporal bones is the squamous suture. The most prominent point at the center of the parietal bone is known as the parietal tuber. On the external surface, slightly below the midpoint, run two arched lines extending from front to back. The upper line is called the superior temporal line, which serves as the attachment site for the temporal fascia. The lower line is the inferior temporal line, where the temporal muscle attaches. The external surface's central prominence is referred to as the parietal tuber. The distance between the two tubers corresponds to the maximum width of the skull and serves as a key landmark for measuring cranial breadth.
Anterior to the parietal bones lies the frontal bone, and posteriorly lies the occipital bone. Between the frontal and occipital bones are the left and right parietal bones. Severe trauma to this region may extend down to the base of the skull. If the injury extends to the skull base, it indicates a more serious fracture. In such cases, intracranial complications must be evaluated; if any intracranial abnormalities are detected, hospitalization and treatment are required. Care should be taken to avoid additional trauma.
