Age-related ventricular enlargement - caused not by microgravity but by brain atrophy - can be associated with cognitive decline. This headward fluid shift likely results in ventricular expansion, and the brain sits higher within the skull." The study involved 23 male and seven female astronauts - average age around 47 - from the U.S., Canadian and European space agencies. Microgravity conditions also cause other physiological effects due to the reduced physical load on the human body. Elevated cancer risk from the greater exposure to solar radiation that astronauts may encounter the further they travel from Earth is another concern.

Source: The Hindu June 09, 2023 10:52 UTC