Segmental and interganglionic projections from primary fibres of insect mechanoreceptors

Hustert, Reinhold

doi:10.1007/bf00220400

Cited by 90 publications

(43 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…6h). The location, number of sensory neurons, and dendritic orientation of these pleural COs match those in locusts (Hustert 1978). The other group is located in the medio-ventral region of abdominal sternites (Fig.…”

Section: Abdominal Chordotonal Organs In Stink Bugsmentioning

confidence: 61%

See 1 more Smart Citation

Chordotonal organs in hemipteran insects: unique peripheral structures but conserved central organization revealed by comparative neuroanatomy

2016

View full text Add to dashboard Cite

(within 250 words)Hemipteran insects use sophisticated vibrational communications by striking body appendages to the substrate or by oscillating the abdominal tymbal. There has been, however, little investigation of sensory channels for processing vibrational signals.Using sensory nerve stainings and low invasive confocal analyses, we demonstrate the comprehensive neuronal mapping of putative vibration-responsive chordotonal organs

show abstract

Section: Abdominal Chordotonal Organs In Stink Bugsmentioning

confidence: 61%

“…6f and S2a). There are two populations of COs. One group is located in the pleural fold between tergites and sternites of abdominal segments, designated pleural COs after Hustert (1978). Each pleural CO contains one sensory neuron (Fig.…”

Section: Abdominal Chordotonal Organs In Stink Bugsmentioning

confidence: 99%

Chordotonal organs in hemipteran insects: unique peripheral structures but conserved central organization revealed by comparative neuroanatomy

2016

View full text Add to dashboard Cite

show abstract

“…The information then has to travel to the neighboring segment. Hardly any direct connections from sensory neurons into neighboring segments have so far been demonstrated (Hustert, 1978), but with connective lengths averaging about 17mm between the prothorax and mesothorax and 10mm between the mesothorax and metathorax (Cruse, 1976), and with conductance velocities within the connective of about 2-2.8mms -1 (Brunner et al, 1990), one can assume at least another 4-9ms until the first spikes reach the neighboring ganglion. Depending on how far distal in the leg the innervated muscle is, it takes an additional 1-5ms for the motoneuron spikes to travel to the neuromuscular end plate (Höltje and Hustert, 2003).…”

Section: Targeting Accuracy Changes Between Standing and Moving Targementioning

confidence: 98%

Segment-specific and state-dependent targeting accuracy of the stick insect

Wosnitza

Engelen

Gruhn

2013

Journal of Experimental Biology

View full text Add to dashboard Cite

SUMMARYIn its natural habitat, Carausius morosus climbs on the branches of bushes and trees. Previous work suggested that stick insects perform targeting movements with their hindlegs to find support more easily. It has been assumed that the animals use position information from the anterior legs to control the touchdown position of the ipsilateral posterior legs. Here we addressed the question of whether not only the hindleg but also the middle leg performs targeting, and whether targeting is still present in a walking animal when influences of mechanical coupling through the ground are removed. If this were the case, it would emphasize the role of underlying neuronal mechanisms. We studied whether targeting occurred in both legs, when the rostral neighboring leg, i.e. either the middle or the front leg, was placed at defined positions relative to the body, and analyzed targeting precision for dependency on the targeted position. Under these conditions, the touchdown positions of the hindlegs show correlation to the position of the middle leg parallel and perpendicular to the body axis, while only weak correlation exists between the middle and front legs, and only in parallel to the body axis. In continuously walking tethered animals, targeting accuracy of the hindlegs and middle legs parallel to the body axis barely differed. However, targeting became significantly more accurate perpendicular to the body axis. Our results suggest that a neural mechanism exists for controlling the touchdown position of the posterior leg but that the strength of this mechanism is segment specific and dependent on the behavioral context in which it is used. Supplementary material available online at

show abstract

“…In locusts, it has been shown that signals from leg sense organs are largely conveyed by intersegmental interneurons to other ganglia and only rarely do sense organs have intersegmental projections (Hustert, 1978). The intersegmental interneurons can be descending (Laurent, 1987;Laurent and Burrows, 1989a;Laurent and Burrows, 1989b) or ascending (Laurent and Burrows, 1988).…”

Section: Gaits In Amputees and Inter-leg Controlmentioning

confidence: 99%

Quadrupedal gaits in hexapod animals - inter-leg coordination in free-walking adult stick insects

Grabowska

Godlewska

Schmidt

et al. 2012

Journal of Experimental Biology

120

View full text Add to dashboard Cite

SUMMARYThe analysis of inter-leg coordination in insect walking is generally a study of six-legged locomotion. For decades, the stick insect Carausius morosus has been instrumental for unravelling the rules and mechanisms that control leg coordination in hexapeds. We analysed inter-leg coordination in C. morosus that freely walked on straight paths on plane surfaces with different slopes. Consecutive 1.7s sections were assigned inter-leg coordination patterns (which we call gaits) based on footfall patterns. Regular gaits, i.e. wave, tetrapod or tripod gaits, occurred in different proportions depending on surface slopes. Tetrapod gaits were observed most frequently, wave gaits only occurred on 90deg inclining slopes and tripod gaits occurred most often on 15deg declining slopes, i.e. in 40% of the sections. Depending on the slope, 36-66% of the sections were assigned irregular gaits. Irregular gaits were mostly due to multiple stepping by the front legs, which is perhaps probing behaviour, not phase coupled to the middle legsʼ cycles. In irregular gaits, middle leg and hindleg coordination was regular, related to quadrupedal walk and wave gaits. Apparently, front legs uncouple from and couple to the walking system without compromising middle leg and hindleg coordination. In front leg amputees, the remaining legs were strictly coordinated. In hindleg and middle leg amputees, the front legs continued multiple stepping. The coordination of middle leg amputees was maladapted, with front legs and hindlegs performing multiple steps or ipsilateral legs being in simultaneous swing. Thus, afferent information from middle legs might be necessary for a regular hindleg stepping pattern. Supplementary material available online at

show abstract

Segmental and interganglionic projections from primary fibres of insect mechanoreceptors

Cited by 90 publications

References 19 publications

Chordotonal organs in hemipteran insects: unique peripheral structures but conserved central organization revealed by comparative neuroanatomy

Chordotonal organs in hemipteran insects: unique peripheral structures but conserved central organization revealed by comparative neuroanatomy

Segment-specific and state-dependent targeting accuracy of the stick insect

Quadrupedal gaits in hexapod animals - inter-leg coordination in free-walking adult stick insects

Contact Info

Product

Resources

About