Investigation of mechanical properties of tibia and femur articulations of insect joints with different joint functions

Oh, Jun Kyun; Behmer, Spencer T.; Marquess, Richelle; Scholar, Ethan A.

doi:10.1557/mrc.2019.71

Cited by 6 publications

(4 citation statements)

References 17 publications

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“…Thus, future models should implement the anisotropic viscoelastic material properties which are most likely also characteristic for CS fields and their surrounding cuticle. Further, in other insects, like a mantid (Mantidae) and a beetle (Tenebrionidae), it has been shown that joint stiffness varies throughout the leg, which could have considerable effects on the nearby CS [ 41 ].…”

Section: Discussionmentioning

confidence: 99%

Ultra high-resolution biomechanics suggest that substructures within insect mechanosensors decisively affect their sensitivity

Dinges

Bockemühl

Iacoviello

et al. 2022

J. R. Soc. Interface.

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Insect load sensors, called campaniform sensilla (CS), measure strain changes within the cuticle of appendages. This mechanotransduction provides the neuromuscular system with feedback for posture and locomotion. Owing to their diverse morphology and arrangement, CS can encode different strain directions. We used nano-computed tomography and finite-element analysis to investigate how different CS morphologies within one location—the femoral CS field of the leg in the fruit fly Drosophila —interact under load. By investigating the influence of CS substructures' material properties during simulated limb displacement with naturalistic forces, we could show that CS substructures (i.e. socket and collar) influence strain distribution throughout the whole CS field. Altered socket and collar elastic moduli resulted in 5% relative differences in displacement, and the artificial removal of all sockets caused differences greater than 20% in cap displacement. Apparently, CS sockets support the distribution of distal strain to more proximal CS, while collars alter CS displacement more locally. Harder sockets can increase or decrease CS displacement depending on sensor location. Furthermore, high-resolution imaging revealed that sockets are interconnected in subcuticular rows. In summary, the sensitivity of individual CS is dependent on the configuration of other CS and their substructures.

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Section: Discussionmentioning

confidence: 99%

Ultra high-resolution biomechanics suggest that substructures within insect mechanosensors decisively affect their sensitivity

Dinges

Bockemühl

Iacoviello

et al. 2022

J. R. Soc. Interface.

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“…Nanoindentation has emerged as a leading technique for investigating small, thin, local, and specific regions of the nanomechanical properties of inhomogeneous biomaterials, and this allows for local probing at micro‐ and nanoscales [ 34 , 35 ]. In the present study, nanoindentation experiments were performed in the central regions of the claws of C. buqueti Guer using a quantitative nanomechanical testing instrument (Nano Indenter G200; Agilent Technologies, Inc. USA) equipped with a Berkovich diamond indenter tip and a scanning probe microscope; a tip radius of 200 nm was chosen.…”

Section: Methodsmentioning

confidence: 99%

Mathematical model and nanoindentation properties of the claws of Cyrtotrachelus buqueti Guer (Coleoptera: Curculionidae)

Sun

Guo

et al. 2022

IET Nanobiotechnology

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Scanning electron microscopy (SEM) was used to observe the macroscopic, microscopic, and cross‐sectional structures of the claws of Cyrtotrachelus buqueti Guer (Coleoptera: Curculionidae), and a mathematical model of a claw was used to investigate the structure–function relationships. To improve the quality of the SEM images, a non‐local means (NLM) algorithm and an improved NLM algorithm were applied. After comparison and analysis of five classical edge‐detection algorithms, the boundaries of the structural features of the claw were extracted based on a B‐spline wavelet algorithm, and the results showed that the variable curvature of the beetle claw enhances its adhesion force and improves its strength. Adhesion models of the claw were established, and the mechanical properties of its biomaterials were measured using nanoindentation. Considering that the presence of water can affect the hardness and Young's modulus, both ‘dry’ and ‘wet’ samples were examined. For the dry samples, the hardness and Young's modulus were 0.197 ± 0.074 GPa and 1.105 ± 0.197 GPa, respectively, whereas the respective values for the wet samples were both lower at 0.071 ± 0.030 GPa and 0.693 ± 0.163 GPa. This study provides data that can inform the design of climbing robots.

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“…We can conclude that leg-injuries carry a greater risk of causing lethal infections when exposed to pathogens than antennal injuries. Both the wound size -which increases the surface for pathogen exposure -and a potentially greater vascular (hemolymph) circulation in the leg may contribute to the lethality of the pathogen on the wound (Hantschk 1991;Pass 2000;Oh et al 2019;Frank et al 2022;Frank et al 2023 preprint).…”

Section: Wound Care Behavior and Survivalmentioning

confidence: 99%

Injury-dependent wound care behavior in the desert ant Cataglyphis nodus

Beydizada,

Abel,

Schultheiss

et al. 2024

Preprint

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Ants often face injuries during foraging, or interspecific competition, elevating infection risk and mortality among the wounded. To avoid this, ants engage in wound care on injured nestmates as a form of social immunity. In this study, we show that Cataglyphis nodus desert ants perform differentiated wound care behavior, depending on wound location and state. Leg-injured ants received significantly more wound care than antenna-injured ants. However, leg wounds with induced infections received barely any wound care from nestmates, leading to similar levels of mortality in isolation and inside the nest. Instead, such leg-infected ants are expelled from the nest, emphasizing the care-kill dichotomy in social immunity. Infections of antennal wounds showed no change in the level of wound care, nor increased mortality. Our results suggest that the level of wound care in ants can be flexibly adjusted to the perceived mortality risk of injuries. Leg injuries pose a greater risk of infection and mortality compared to antennal injuries, likely because of the larger wound area and increased vascular circulation, necessitating intensive prophylactic care to prevent infection. This study is the first to show wound care in Cataglyphis ants despite their short lifespan and offers significant insights into social immunity mechanisms.

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Investigation of mechanical properties of tibia and femur articulations of insect joints with different joint functions

Abstract: Abstract

Cited by 6 publications

References 17 publications

Ultra high-resolution biomechanics suggest that substructures within insect mechanosensors decisively affect their sensitivity

Ultra high-resolution biomechanics suggest that substructures within insect mechanosensors decisively affect their sensitivity

Mathematical model and nanoindentation properties of the claws of Cyrtotrachelus buqueti Guer (Coleoptera: Curculionidae)

Injury-dependent wound care behavior in the desert ant Cataglyphis nodus

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