Hardening of the arteries, also called atherosclerosis, occurs when fat, cholesterol, and other substances build up in the walls of arteries. These deposits are called plaques.efinition. Hardening of the arteries, also called atherosclerosis, occurs when fat, cholesterol, and other substances build up in the walls of arteries. These deposits are called plaques. Over time, these plaques can block the arteries and cause problems throughout the body.
CNS fatigue (CNS = central nervous system) is a slightly more convoluted phenomenon, but the term is thrown around frequently in the world of fitness. By itself, the acronym evokes notions of frailty, complication, and extreme caution.NS fatigue (CNS = central nervous system) is a slightly more convoluted phenomenon, but the term is thrown around frequently in the world of fitness. By itself, the acronym evokes notions of frailty, complication, and extreme caution.
Central nervous system oxygen toxicity: High oxygen levels which affects the central nervous system. The condition can occur during deep dives with fatal consequences. More detailed information about the symptoms, causes, and treatments of Central nervous system oxygen toxicity is available below.entral nervous system oxygen toxicity: High oxygen levels which affects the central nervous system. The condition can occur during deep dives with fatal consequences. More detailed information about the symptoms, causes, and treatments of Central nervous system oxygen toxicity is available below.