The most frequent use of the term parietal is associated with a bone which is in the head . The parietales, in this sense, are part of the skull , protecting its lateral and upper region.
Every parietal bone It has an internal and an external face, it has a square shape and therefore has four edges. He left parietal bone and the right parietal bone they are united by the sagittal suture .
The parietal bone joints are carried out through the lambdoid suture (with the occipital), the flaky suture (with the temporal and sphenoid), the coronal suture (with the frontal) and the aforementioned sagittal suture (with the other parietal bone).
The region of the brain that is under each parietal bone is called parietal lobe . These lobes occupy the middle and lateral area of the head and are responsible for capturing sensations such as pain and temperature. A lesion in the parietal lobe can cause limb problems on the opposite side, speech problems and reading disorders.
According to a study by paleoneurologist Emiliano Bruner, who works at the National Center for Investigation Human in Spain, and the neuropsychiatrist Heidi Jacobs, of 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 expose the results of their research, they ensure that Alzheimer's is a consequence of the evolution of our brain .
It is a new point of view, which opens the door to considerations that had not been made so far with regard to this disorder: disease 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 of the parietal lobe, associated with the cognitive capacity that (as insists on ensuring science) differentiates us from other animals, including the primates .
The explanation revolves around at the price we had to pay due to this superiority at the cognitive level, to the side effects of the evolution that separated us from the rest of the species and from our own ancestors. Simply put, given the location of our parietal lobe, which seen from above or in profile is located in the center of the brain, it is prone to suffer high temperatures . On the other hand, it also demands considerable vascular activity, which can be linked to toxicity, and requires a lot of energy, something that can have a negative effect on the metabolism.
Connecting the supposed discovery with the notions existing so far, the researchers say that the effects associated with Alzheimer's disease in the frontal and temporal areas are not their cause , but a consequence of its appearance. It is worth mentioning that studies have not been able to determine precisely at what point of evolution this defect has appeared in the parietal lobe and that they do not represent a cure, although they can open the doors to more effective treatments in the future.
At soccer , hitting the ball with the parietal is one of the most common techniques of header . It is common for a footballer who faces the rival goal, in the area of the area, to receive an air pass (known as a center) from the side of the court. Therefore, to impact the ball with the 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 that linked to a wall .