[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.
Frontal Lobe: Front part of the brain; involved in planning, organizing, problem solving, selective attention, personality and a variety of âhigher. cognitive functionsâ including behavior and emotions. The anterior (front) portion of the frontal lobe is called the prefrontal cortex.