ABOVE: Manduca sexta hooked to a tether as it flies toward a plastic “flower”
ROB FELT, GEORGIA TECH
When a hawk moth (Manduca sexta) hovers around a flower to sip nectar, it uses flight muscles that are coordinated by the timing of neuronal signals down to the millisecond, according to a study published in PNAS December 16.
A hawk moth’s flight muscles are controlled by only a few motor neurons. Researchers led by neuromechanist Simon Sponberg at Georgia Tech tracked the activity of these neurons by inserting small wires into the moths’ exoskeletons. The insects were tethered in place near a moving 3D-printed plastic flower that they attempted to fly toward. As the moths flexed their muscles, a computer recorded the action potentials generated by the neurons, and an accelerometer measured torque generated by muscle movements. Together, these measurements provided a picture of neuronal activity during flight.
The researchers found that ...
