Mechanical Properties of a Drosophila Larval Chordotonal Organ

Proprioception is an integral part of the feedback circuit that is essential for locomotion control in all animals. Chordotonal organs perform proprioceptive and other mechanosensory functions in insects and crustaceans. The mechanical properties of these organs are believed to be adapted to the sensory functions, but had not been probed directly. We measured mechanical properties of a particular chordotonal organ—the lateral pentascolopidial (lch5) organ of Drosophila larvae—which plays a key role in proprioceptive locomotion control.

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