A few weeks ago I read an article in the paper De Standaard about how the human brain tissue gets renewed. From earlier research we know that, in every body part, cells and tissue, are replaced. We also know exactly how fast this process is for skeletal muscle tissue. It was never possible to test human brain tissue in vivo, but now Luc van Loon from the UMCM (Medical Center Maastricht) has taken human brain tissue from 6 patients who were undergoing brain surgery. After testing the brain tissue and comparing the given samples to samples of e.g. knee tissue, he came to the conclusion that the continuous reconditioning of brain tissue happens a lot faster than we ever thought.
Brain activity asks for a lot of energy. Van Loon said that the necessity of a big amount of energy becomes clear when he got the test results back. A big part of that energy adds to the renewal process of tissue. Because all brain tissue is replaced, researcher Van Loon asked an existential question: ‘If the bricks of our brain are so frequently replaced, are we the same as we were a few weeks before?’ A few years back, I remember reading an article that stated that humans share more similarities with a stranger, than with their 7-year younger selves. I remember being very intrigued, but after doing some research on the web I did not succeed at finding any article about this theory or any other evidence.
The question of Van Loon got me to thinking of something else: could this be a scientific proof of the fact that humans have a soul?