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Acute, Low-Dose Neutron Exposures Adversely Impact Central Nervous System Function.
Peter M Klein1, Yasaman Alaghband2, Ngoc-Lien Doan2
1Department of Neurosurgery, Stanford University, Stanford, CA 94305, USA.
International Journal of Molecular Sciences
|August 27, 2021
Summary
Space travel poses risks from galactic cosmic radiation (GCR). Acute neutron radiation exposure, like chronic exposure, harms the central nervous system, impacting learning and memory.
Area of Science:
- Space science
- Neuroscience
- Radiation biology
Background:
- Long-duration space travel exposes astronauts to galactic cosmic radiation (GCR).
- GCR, composed of energetic particles, can cause central nervous system deficits.
- Spacecraft shielding may increase neutron radiation exposure.
Purpose of the Study:
- To investigate the effects of acute neutron radiation exposure on the central nervous system.
- To compare the neurological impacts of acute versus chronic neutron radiation exposure.
- To assess the risks of neutron radiation for astronauts during space missions.
Main Methods:
- Male mice were exposed to acute low doses (18 cGy) of neutron radiation.
- Hippocampal synaptic signaling was measured.
- Cognitive functions, including learning and memory, were assessed.
Main Results:
- Acute neutron radiation exposure suppressed hippocampal synaptic signaling.
- Learning and memory performance in mice were decreased after acute exposure.
- Neurological disruptions from neutron radiation occurred regardless of exposure duration.
Conclusions:
- Acute neutron radiation poses similar nervous system risks as chronic exposure.
- Neutron irradiation affects the same central nervous system elements as charged particle GCR.
- Neutron radiation risks must be considered for astronaut safety in space.
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