... provided by proprioceptors monitoring positions and movements of body parts and providing feedback to other components of locomotor networks. In insects, proprioceptive chordotonal organs span joints and encode parameters of relative movement between segments. Previous studies have used whole-organ...

... half of the posterior side of the outer membrane,while at higher frequencies (5–20 kHz) the entire membrane contributed to the vibration. The maximum deflection points of the two vibrational modes correspond to the locations of the associated chordotonal organs, suggesting that M. peleides has...

... was chosen to examine possible targets of the insecticide. The femoral chordotonal organ, which monitors joint position and movement, turned out to be the primary site of pymetrozine action, while interneurons,motoneurons and central motor control circuitry in general did not noticeably respond...

... anonymous reviewers for providing helpful comments. References Conner W. E. ( 1999 ). `Un chant d'appel amoureux': Acoustic communication in moths. J. Exp. Biol. 202 , 1711 -1723. Field, L. H. and Matheson, T. ( 1998 ). Chordotonal organs of insects. Adv. Insect Physiol. 27 , 1 -228...

...-mail: [email protected] 8 2 2002 © The Company of Biologists Limited 2002 2002 acoustic communication auditory tuning biomechanics bioacoustics chordotonal organ courtship dynamic range compression ear insect antenna hearing song Johnston's organ mechanosensation non...

... a proprioceptor in the tailfan of the crayfish. Twenty identified interneurones responded during stimulation of the exopodite–endopodite chordotonal organ. Of these 20 interneurones, three were excited phaso-tonically, nine were excited phasically and eight were inhibited. All received convergent exteroceptive...

... in different regions of the pilifer revealed that the auditory afferent response originates in the basal pilifer region. The sensory organ was identified as a chordotonal organ that attaches to the base of the pilifer. This organ is the only sensory structure in the basal pilifer region and consists...

...Thomas Matheson ABSTRACT A multineuronal proprioceptor, the femoral chordotonal organ (feCO), monitors the position and movements of the tibia of an insect leg. Superfusing the locust metathoracic feCO with the neuromodulator octopamine, or the octopamine agonist synephrine, affects the position...

...M. S. Nowel; P. M. J. Shelton; R. O. Stephen ABSTRACT The metathoracic chordotonal organ of the cricket Acheta domesticus (Gryllidae) consists of two closely associated scoloparia situated proximally within the femur with their distal ends connected by a pair of ligaments to an apodeme arising from...

... joint. In invertebrates, this sensory feedback is provided by external (e.g. hair fields, hair rows) and/or internal sense organs (e.g. chordotonal organs). The femoral chordotonal organ (fCO) serves as the main proprioceptor in the control loop governing the femur–tibia (FT) joint of the insect leg...

... and femoral chordotonal organ (the afferent source of the reflex). We conclude that position-dependency originates from a decrease in the number of phasic femoral chordotonal organ neurones sensitive to joint movement as larger FTAs are approached. Position-dependency is only roughly correlated...

...P. M. J. Shelton; R. O. Stephen; J. J. A. Scott; A. R. Tindall ABSTRACT The mechanical connections of the metathoracic femoral chordotonal organ (mtFCO) with its insertion at the femoro-tibial joint are described. The apodeme complex is shown to consist of a distal cuticular rod that is replaced...

..., the femoral chordotonal organ (ChO). The nonspiking interneurones in the femur-tibia control loop were characterized by their inputs from the ChO, their output properties onto the extensor motoneurones and their morphology. Eight different morphological and physiological types of nonspiking interneurones...

...K. G. Pearson; B. Hedwig; H. Wolf ABSTRACT Anatomical and electrophysiological techniques were used to examine the structure, central nervous connections and discharge patterns of afferents arising from the hindwing chordotonal organs in the locust, Locusta migratoria . The hindwing chordotonal...

...Ansgar Büschges ABSTRACT The femoral chordotonal organ (ChO) of the right middle leg of the inactive stick insect Carausius morosus was stimulated by applying movements having a ramp-like time course, while recordings were made from local and interganglionic interneurones in the anterior ventral...

...Ulrich Bässler ABSTRACT A rampwise stretch of the femoral chordotonal organ is known often to elicit a response in the active decerebrate stick insect that is termed an ‘active reaction’, and which can be considered to represent part of the step cycle. During the first part of the response...

...Peter Bräunig ABSTRACT The so-called flexor strand of the femoral chordotonal organ of the locust jumping leg was found to be innervated by a single sensory neurone with its cell body in the metathoracic ganglion. The strand is therefore a new mechanoreceptor of the strand receptor class...

...T. Hofmann; U. T. Koch ABSTRACT The femoral chordotonal organ of the stick insect Cuniculina impigra was stimulated by moving its apodeme with staircase-like waveforms having independently controllable acceleration and velocity values. Intracellular recordings were made of receptor units...

...T. Hofmann; U. T. Koch; U. Bässler ABSTRACT The femoral chordotonal organ of the stick insect Cuniculina impigra Redtenbacher (Phasmida) can be stimulated precisely by moving the receptor apodeme. Single sensory units in the sensory nerve are recorded using glass microelectrodes. The units...