A giant flower beetle is shown flying with an electronic backpack. Researchers remotely control its untethered flight by stimulating a newly discovered steering muscle. (Credit: Tat Thang Vo Doan and Hirotaka Sato/NTU Singapore)
Provided by Sarah Yang, University of California-Berkeley
Hard-wiring beetles for radio-controlled flight turns out to be a fitting way to learn more about their biology. Cyborg insect research led by engineers at the University of California, Berkeley, and Singapores Nanyang Technological University (NTU) is enabling new revelations about a muscle used by beetles for finely graded turns.
By strapping tiny computers and wireless radios onto the backs of giant flower beetles and recording neuromuscular data as the bugs flew untethered, scientists determined that a muscle known for controlling the folding of wings was also critical to steering. The researchers then used that information to improve the precision of the beetles remote-controlled turns.
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This study, to be published Monday, March 16, in the journalCurrent Biology, showcases the potential of wireless sensors in biological research. Research in this field could also lead to applications such as tools to aid search-and-rescue operations in areas too dangerous for humans.
The giant flower beetles in this study averaged 6 centimeters long and weighed about 8 grams. (Credit: Tat Thang Vo Doan and Hirotaka Sato/NTU Singapore)
This is a demonstration of how tiny electronics can answer interesting, fundamental questions for the larger scientific community, said Michel Maharbiz, an associate professor in UC Berkeleys Department of Electrical Engineering and Computer Sciences and the studys principal investigator. Biologists trying to record and study flying insects typically had to do so with the subject tethered. It had been unclear if tethering interfered with the insects natural flight motions.
In particular, the researchers said, it had been difficult to elucidate the role that smaller muscles play in fine steering. What the new study found was that the coleopteran third axillary sclerite (3Ax) muscle, found in the articulation of insect wings, plays a key function in the beetles ability to steer left or right.
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