Cockroaches have a memory and can be taught to salivate in response to neutral stimuli in the way that Pavlov's dogs would do when the famed Russian doctor rang his bell, Japanese researchers found.
Such "conditioning" can only take place when there is memory and learning, and this salivating response had only previously been proven in humans and dogs.
Now, cockroaches appear to have that aptitude too.
Writing in the latest edition of the online journal Public Library of Science, the researchers said they hoped to learn more about the human brain by exploring what goes on in the simpler brain of the cockroach. (Article is freely available on http://www.plosone.org/doi/pone.0000529)
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