[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.
The term cerebral cortex typically refers to all 4 lobes in the human brain (occipital, parietal, temporal, and frontal). It would be impossible to say what results from general cerebral cortex damage as the brain carries out so many different functions which are not evenly dispersed across the cortex.