[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.
Damage often occurs to the cerebral motor cortex, a portion of the brain that lies at the back of the frontal lobe just before the fold that separates the frontal lobe from the parietal lobe, as described by the Canadian Institute of Neurosciences, Mental Health and Addiction.lthough the gray matter processes the information in the brain, the white matter transmits the signals to the rest of the body. Some cerebral palsy occurs due to damage to the white matter, a condition known as periventricular leukomalacia--PVL. The damage in PVL looks like tiny holes in the white matter.