Fig. 3. Catalepsy in Prosarthria teretrirostris. (A) Original recording from a female hind leg. Starting from a resting position, the joint was (almost fully) flexed to 40°, kept there for approximately 25 s and released (light arrow). When the leg had reached a constant position, it was (almost fully) extended to 170 °, kept there for 25 s and released (heavy arrow). (B) Consecutive return movements of two hind legs recorded after passive flexion to 40°. The movement velocities in animal a (female) were the fastest recorded. The animal was briefly activated by touching its abdomen between return movements 2 and 3. Movement velocities in animal b (male) were the slowest recorded. Between return movements 4 and 5, the animal was briefly activated by touching its abdomen. Other individuals yielded curves located between the sample recordings shown. The shaded area indicates the range of return movements reported for Carausius morosus (Bässler, 1972b). (C,D) Time constants () for the return movements (means ± S.D.) of seven middle (C) and six hind (D) legs of males, before and after cutting the femoral chordotonal organ receptor apodeme. Differences between the intact and operated situations are statistically significant for both hind and middle legs. The leg position was monitored with the attached-flag method in A and B and with the optical method in C and D.