Gravity reception in crickets: the influence of cercal and antennal afferences on the head position

In the cricket, Gryllus bimaculatus , compensatory head movements are elicited by cercal and antennal receptors when the animals are rotated around their longitudinal axis. The cercal afferences originate in the club-shaped sensilla, whereas the antennal ones probably arise in receptors measuring displacements of the flagellum at the joint between scapus and pedicellus. The club-shaped cercal sensilla are true gravity receptors different from the proprioceptive gravity receptor systems characteristic of most insects.