...Berit Brüstle; Sabine Kreissl; Donald L. Mykles; Werner Rathmayer SUMMARY In the isopod Idotea emarginata , the neuropeptide proctolin is contained in a single pair of motoneurones located in pereion ganglion 4. The two neurones supply dorsal extensor muscle fibres of all segments. Proctolin...

... underlying this facilitatory control of body posture in the active animals, we used intracellular recordings to analyse the synaptic activities of uropod motor system neurones in an unanaesthetized whole-animal preparation. Several uropod motoneurones were found to receive sustained depolarizing inputs...

... changes in gain is described for tibial torque, for extensor tibiae muscle force and for motoneuronal activity. In open-loop experiments, sinusoidal stimuli are applied to the femoral chordotonal organ (fCO). Changes in gain that depend on fCO stimulus parameters (such as amplitude, frequency...

... abductor muscle (M126) was highly correlated with hindleg steering and was coupled to the elevator phase of the flight cycle. Fictive flight and steering could also be elicited in animals dissected for intracellular recording of motoneurones innervating M126. During fictive flight activity, motoneurones...

... of the motor rhythm ( Russell and Hartline, 1978 , 1982 ; Tazaki and Cooke, 1979 a – c , 1983 a – c , 1986 , 1990 ). Plateau potentials are not restricted to interneurones of the central pattern generator; they may also be recorded from motoneurones, which form the final output to muscles. Thus, plateau...

... cells and a dorsal scoloparium with about 420 sensory cells. The present study examines the function of these scoloparia in the femur-tibia control loop. Both scoloparia were stimulated independently and the responses in the extensor tibiae motoneurones were recorded extra-and intracellularly...

... indicates that visual inputs can speed a response which can be released by extraretinal photoreceptors alone. Recordings from electrodes implanted in intact, freely behaving animals demonstrate that ventral illumination tonically excites abdominal postural flexor motoneurones. The motoneurone discharge...