The effect of spaceflight and microgravity on the human brain

Area of Science:

• Neuroscience
• Space Physiology
• Human Physiology

Background:

• Space missions involve microgravity, confinement, and isolation, negatively impacting astronaut physiology.
• While cardiovascular and musculoskeletal effects are studied, the central nervous system's response to spaceflight is less understood.
• Existing research indicates psychological, neurovestibular, and cognitive changes, but neural mechanisms require further investigation.

Purpose of the Study:

• To determine the precise impact of spaceflight on the human central nervous system.
• To identify the underlying neural substrates affected by space travel.
• To inform strategies for mitigating negative physiological effects during long-duration space missions.

Main Methods:

• Review of previous space analogue studies.
• Analysis of preliminary spaceflight studies.
• Synthesis of existing literature on neurovestibular and sensorimotor alterations.

Main Results:

• Spaceflight affects sensorimotor and somatosensory cortical areas.
• The cerebellum and vestibular pathways are implicated in spaceflight-induced neurological changes.
• Cephalic fluid shifts and neurovestibular issues are reported consequences.

Conclusions:

• Further research into the neural effects of spaceflight is crucial for long-duration missions like Mars travel.
• Understanding these effects can benefit vestibular patients, neurodegenerative disease patients, and the elderly.
• Insights gained are applicable to managing multisensory deficits, immobilization, and inactivity on Earth.