[Gravitational] waves are perturbations of spacetime which travel at c. However, spacetime is allowed to expand and contract faster than c. An expansion followed by a compression is pretty much the definition of a compression wave.
Damage to the brainâs frontal and temporal lobes causes forms of dementia called frontotemporal disorders. Frontotemporal disorders are the result of damage to neurons (nerve cells) in parts of the brain called the frontal and temporal lobes. As neurons die in the frontal and temporal regions, these lobes atrophy, or shrink.
What Part of the Brain is the Most Susceptible to Injury? The Most Injury Prone Area of the Brain and How to Protect It While most parts of your brain can be affected by an accident, the frontal lobe is the most vulnerable area. It is also one of the most exposed and most used parts of the brain, making injuries there frequent and devastating.