Lobule Parietal Inferior

The lower parietal lobule (lat. l. parietalis inf.) is the small upper temporal bone of the head in the human skull.

Entirely with muscles it is divided into: - The superior temporal fossa. - Corner. - Joint. - The upper outer part of the temporal fossa. Of the listed parts, only the corner is spongy. The structure has a very small cell structure and is contained internally. Another feature is that the temporal fossa, being spongy, also has a spongy structure. The shape of the bone resembles a tetrahedral pyramid. The underlying structure is represented by the orbit. The shape of the inner surface corresponds to the shape of the inner tissue of the upper wall of the skull. A cut through the inferior parietal bone indicates the symmetry of the paired bones. However, the bones differ from each other in some respects. So their total weight is different. The lower parietal bone weighs on average 9-65 g, while the weight of the upper parietal bone ranges from 5 to 35 g. This is due to the fact that the lower parietal fossa is deprived of part of the spongy substance in some people (only the condyle remains). . Almost all of the mandibular processes are connected to the skull using dense fibrous tissue. The only exceptions are the temporal branches, which transmit signals through the cerebellum. The anterior edges of the parietal and temporal processes are not connected at birth. They are freely located and movable. But already in the ninth month of life everything can change. From this point on, other connections begin to form, for example between the lower fibers of the temporal fossae and the frontonasal bone. This bone tissue becomes the strongest first a year before birth.