Mechanoreceptive sensillum fields at the tarsal tip of insect legs

Joel, Anna-Christin; Adamova, Hana; Bräunig, Peter

doi:10.1002/jmor.20898

Cited by 5 publications

(8 citation statements)

References 19 publications

(34 reference statements)

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“…In total, we found over 680 sensilla arranged in 26 fields, 54 groups, and 34 single CS. Based on previous work (Joel et al, 2018;Merritt & Murphey, 1992;Yasuyama & Salvaterra, 1999), it is likely that CS in males are at the same locations as in females.…”

Section: Discussionmentioning

confidence: 98%

“…(Merritt & Murphey, 1992) show four CS on the dorsal, distal end, whereas Yasuyama and Salvaterra (1999) show two CS at this location. Joel et al (2018) also show four CS at this location (leg type unspecified). However, they identified these to be on the ventral instead of the dorsal side of the segment.…”

Section: Cs Locations On the Legsmentioning

confidence: 96%

“…In Drosophila melanogaster, CS are located on the wings (Cole & Palka, 1982;Huang, Dambly-Chaudiere, & Ghysen, 1991;Lees, 1942;Palka, Lawrence, & Hart, 1979), halteres (Chevalier, 1969;Cole & Palka, 1982;Palka et al, 1979), leg segments (Hoikkala & Moro, 2000;Joel, Adamova, & Bräunig, 2018;Merritt & Murphey, 1992;Yasuyama & Salvaterra, 1999), and thorax (Cole & Palka, 1982).…”

mentioning

confidence: 99%

“…Schematics of D. melanogaster legs have been presented to show the locations of CS on the prothoracic leg (Joel et al, 2018;Merritt & Murphey, 1992;Yasuyama & Salvaterra, 1999) along with a limited selection of electron microscope images (Joel et al, 2018;Merritt & Murphey, 1992); studies to date have, however, focused mostly on the front leg. As the same CS from different legs have differential effects on motor output (Akay, Ludwar, Göritz, Schmitz, & Büschges, 2007), knowledge about the front leg only is insufficient for understanding the entire system (Zill et al, 2004).…”

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confidence: 99%

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Location and arrangement of campaniform sensilla in Drosophila melanogaster

Dinges

Chockley

Bockemühl

et al. 2020

J of Comparative Neurology

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Sensory systems provide input to motor networks on the state of the body and environment. One such sensory system in insects is the campaniform sensilla (CS), which detect deformations of the exoskeleton arising from resisted movements or external perturbations. When physical strain is applied to the cuticle, CS external structures are compressed, leading to transduction in an internal sensory neuron. In Drosophila melanogaster, the distribution of CS on the exoskeleton has not been comprehensively described. To investigate CS number, location, spatial arrangement, and potential differences between individuals, we compared the front, middle, and hind legs of multiple flies using scanning electron microscopy. Additionally, we imaged the entire body surface to confirm known CS locations. On the legs, the number and relative arrangement of CS varied between individuals, and single CS of corresponding segments showed characteristic differences between legs. This knowledge is fundamental for studying the relevance of cuticular strain information within the complex neuromuscular networks controlling posture and movement. This comprehensive account of all D. melanogaster CS helps set the stage for experimental investigations into their responsivity, sensitivity, and roles in sensory acquisition and motor control in a lightweight model organism.

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Section: Discussionmentioning

confidence: 98%

Section: Cs Locations On the Legsmentioning

confidence: 96%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Location and arrangement of campaniform sensilla in Drosophila melanogaster

Dinges

Chockley

Bockemühl

et al. 2020

J of Comparative Neurology

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“…Insects have multiple types of mechanoreceptors and other sensilla on body appendages like legs or antenna [1][2][3][4][5][6][7]. The neuronal innervation pattern shows the organization of motor nerves and muscles [8,9] or sensory nerves and their relation to different sensory organs in insect legs [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Neuronal Innervation of the Subgenual Organ Complex and the Tibial Campaniform Sensilla in the Stick Insect Midleg

Strauß

2020

Insects

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Mechanosensory organs in legs play are crucial receptors in the feedback control of walking and in the detection of substrate-borne vibrations. Stick insects serve as a model for the physiological role of chordotonal organs and campaniform sensilla. This study documents, by axonal tracing, the neural innervation of the complex chordotonal organs and groups of campaniform sensilla in the proximal tibia of the midleg in Sipyloidea sipylus. In total, 6 nerve branches innervate the different sensory structures, and the innervation pattern associates different sensilla types by their position. Sensilla on the anterior and posterior tibia are innervated from distinct nerve branches. In addition, the variation in innervation is studied for five anatomical branching points. The most common variation is the innervation of the subgenual organ sensilla by two nerve branches rather than a single one. The fusion of commonly separated nerve branches also occurred. However, a common innervation pattern can be demonstrated, which is found in >75% of preparations. The variation did not include crossings of nerves between the anterior and posterior side of the leg. The study corrects the innervation of the posterior subgenual organ reported previously. The sensory neuroanatomy and innervation pattern can guide further physiological studies of mechanoreceptor organs and allow evolutionary comparisons to related insect groups.

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