In a discovery that may prove important for cognitive science, our understanding of nature and applications for robot vision, researchers at the University of Adelaide have found evidence that the dragonfly is capable of higher-level thought processes when hunting its prey.
The discovery, to be published online today in the journal Current Biology [link to article which behind a paywall], is the first evidence that an invertebrate animal has brain cells for selective attention, which has so far only been demonstrated in primates.
Here’s how the researchers made the observation (from the EurekAlert news release),
Using a tiny glass probe with a tip that is only 60 nanometers wide – 1500 times smaller than the width of a human hair – the researchers have discovered neuron activity in the dragonfly’s brain that enables this selective attention.
They found that when presented with more than one visual target, the dragonfly brain cell ‘locks on’ to one target and behaves as if the other targets don’t exist.
“Selective attention is fundamental to humans’ ability to select and respond to one sensory stimulus in the presence of distractions,” Dr Wiederman [Dr. Steven Wiederman, University of Adelaide] says.
Wiederman’s research partner suggests this observation has the potential for a number of widespread applications,
“Recent studies reveal similar mechanisms at work in the primate brain, but you might expect it there. We weren’t expecting to find something so sophisticated in lowly insects from a group that’s been around for 325 million years.
“We believe our work will appeal to neuroscientists and engineers alike. For example, it could be used as a model system for robotic vision. Because the insect brain is simple and accessible, future work may allow us to fully understand the underlying network of neurons and copy it into intelligent robots,” he [Associate Professor David O'Carroll, University of Adelaide] says.
You can find more information including pictures and a video in the Dec. 21, 2012 University of Adelaide news release.