The parietal bones are found in the skull.
The parietal is a type of bone found in the head . These bony pieces are part of the skull , protecting its lateral and upper region.
Each parietal bone has an internal and an external face, it is square-shaped and therefore has four edges. The left parietal bone and the right parietal bone are joined by the sagittal suture .
The articulations of the parietal bone are carried out through the lambdoid suture (with the occipital), the squamous suture (with the temporal and sphenoid), the coronal suture (with the frontal) and the already mentioned sagittal suture (with the other parietal bone).
The region of the brain located beneath each parietal bone is called the parietal lobe . These lobes occupy the medial and lateral area of the head and are responsible for capturing sensations such as pain and temperature. An injury to the parietal lobe can cause problems in the limbs on the opposite side, speech problems, and reading disorders.
The parietal lobe and degenerative disorders
According to a study by paleoneurologist Emiliano Bruner , who works at the National Center for Human Research in Spain , and neuropsychiatrist Heidi Jacobs , from the German Institute of Neuroscience located in the German city of Jülich , there is a clear relationship between degenerative disorders and the vulnerable nature of the parietal lobe. In an interesting article published by them to present the results of their research, they claim that Alzheimer's is a "consequence" of the evolution of our brain .
This is a new point of view, which opens the doors to considerations that had not been made until now regarding this disorder: Alzheimer's disease is related to the damage suffered by cells in the frontal and temporal areas of our brain. However, according to the work of Bruner and Jacobs, the appearance of this terrible degenerative disorder begins as a result of a metabolic defect in the parietal lobe, associated with the cognitive capacity that (as science insists on telling us) differentiates us from other animals, including primates .
The explanation revolves around "the price we have had to pay" for said superiority at a cognitive level, the secondary effects of the evolution that separated us from the rest of the species and from our own ancestors. In short, given the location of our parietal lobe, which when seen from above or in profile is located in the center of the brain, it is prone to high temperatures . On the other hand, it also demands considerable vascular activity, which may be linked to toxicity, and requires a lot of energy, something that can have a negative impact on metabolism.
Connecting the supposed discovery with the existing notions so far, the researchers ensure that the effects associated with Alzheimer's disease in the frontal and temporal areas are not its cause , but a consequence of its appearance. It is worth mentioning that studies have not been able to determine precisely at what point in the evolution this defect in the parietal lobe has appeared and that they do not represent a cure, although they can open the doors to more effective treatments in the future.
The link between the nature of the parietal lobe and Alzheimer's disease has been investigated.
The notion in football
In soccer , hitting the ball with the parietal muscle is one of the most common header techniques. It is common for a footballer who is positioned in front of the rival goal, in the area of the area, to receive an aerial pass (known as a cross) from the side of the field. Therefore, to hit the ball with your head, you can use the parietal bone.
It should be noted that, in the strict sense provided by its etymology (the Latin word parietalis ), parietal is something linked to a wall .