Neuro-consequences of the spaceflight environment

Area of Science:

• Space Medicine
• Neuroscience
• Human Physiology

Background:

• Human space exploration, including NASA's Artemis missions, is extending beyond Low Earth Orbit (LEO).
• Astronauts face significant health risks from spaceflight hazards such as ionizing radiation, microgravity, and isolation.
• Ensuring crew brain and behavioral health is paramount for long-duration deep space missions.

Purpose of the Study:

• To comprehensively review the neurobiological and neurobehavioral effects of spaceflight and its analogs.
• To identify mechanisms underlying physiological responses controlled by the Central Nervous System (CNS).
• To inform the development of countermeasures for maintaining astronaut health.

Main Methods:

• Review of existing literature on spaceflight effects on humans and animals.
• Analysis of ground-based spaceflight analogs (simulated weightlessness, social isolation, radiation).
• Discussion of potential dietary and non-dietary countermeasures.

Main Results:

• Spaceflight and its analogs induce significant neurobiological and neurobehavioral changes.
• Understanding CNS responses is key to mitigating spaceflight-induced health issues.
• Various countermeasures, including artificial gravity and antioxidants, show promise.

Conclusions:

• Continued research is essential to ensure neural, sensorimotor, and cognitive functions are maintained during deep space missions.
• Effective countermeasures are crucial to prevent adverse health outcomes and ensure mission success.
• Proactive strategies are needed to safeguard astronaut well-being in extreme environments.