NASA aiming to learn more about long-term radiation exposure
To gather more information about space
radiation, NASA plans to increase its testing of monkeys, according
to a report
published by Discovery News.
The U.S. space agency
previously used lab mice and rats to test radiation, but testing must
be carried out on animals more similar to humans.
“We
realized there was a need for this kind of work,” Harvard Medical
School behavior pharmacologist Jack Bergman told Discovery.
“There’s a long-standing commitment on the part of NASA to deep
space travel and with that commitment comes a need for knowing what
kinds of adverse effects deep space travel might have, what are the
risks to astronauts. That’s not been well
assessed.”
Researchers are especially interested in
long-term radiation exposure and how it alters the central nervous
system of the monkeys. NASA has sent monkeys into space before,
but is this time interested in exposing them to low doses of
radiation -- in an effort to better understand what could happen to
astronauts if sent towards Mars.
Researchers from Lawrence
Berkeley National Laboratory are now using squirrel monkeys trained
to carry out a handful of behavioral tasks. The squirrel
monkeys will then be exposed to varying levels of radiation to see at
what level performance is hindered, with researchers starting out
with low doses.
Specifically, they'll be able to monitor both
immediate effects and long-term effects from the radiation exposure.
After the monkeys are no longer being tested, they'll remain at the
McLean Hospital, where they will not be killed.
Although dogs,
monkeys and other small animals are used for biomedical testing, a
large controversy related to their use remains an issue. It
appears NASA is doing everything in its power to make sure the lab
monkeys will be taken care of, but it's possible animal rights groups
will let their voices be heard regarding the testing.
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