[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 are the parts of the brain? The main parts of the brain are the frontal lobe, temporal lobe,  occipital lobe, parietal lobe, hypothalamus, cerebrum, brain stem  ,and cerebellum. In addition, the brain â¦contains the corpus  callosum, pituitary gland, hypothalamus, and thalamus. The medulla  oblongata and pons are parts of the brain stem.