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The chordotonal organs, present in the joints of the limbs, provide neuronal signals that allow the animal to sense its position or posture—and thus might mediate feedback of a range of behaviors onto the endogenous biological clock.

In flies, the mechanosensory chordotonal organs help to coordinate the effects of temperature on circadian cycles.

The chordotonal organs, which have similarities to the mammalian ear, were also required for sensation of a vibration stimulus and its effects on the endogenous brain clock.

These consist of fine rods suspended between two points of the cuticle, and connected with nerve-fibres; they are known as chordotonal organs.

Chordotonal: responsive to vibrations; applied to the ear-like structures in Orthoptera,.