Persistent pain from an injury may help squid be more vigilant, according to a study in Current Biology. Researchers at the University of Texas Medical School at Houston found that squid reacted more defensively than their uninjured companions after being hurt by predators. But when their pain was alleviated with anesthetic, their defensiveness went away. Researchers hope the squid pain study can shed light on human pain reactions and lead to ways to treat pathological pain.
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