Acta of bioengineering and biomechanics最新文献

{"title":"Effects of rifle handling length and supporting length on aiming performance and biomechanics.","authors":"Yuan Wang, Cheng Xu, Yaping Wang, Long He","doi":"10.37190/abb-02555-2024-02","DOIUrl":"10.37190/abb-02555-2024-02","url":null,"abstract":"<p><p><i>Purpose</i>: One of the most crucial factors affecting shooting performance is aiming stability, which is affected by the human-gun parameters. The effect of human-gun parameters on performance and biomechanics has not been investigated due to experimental limitations. This paper analyzed the aiming stability and biomechanics under different rifle handling length and supporting length based on experiments and musculoskeletal model. <i>Methods</i>: The aiming performance and balance posture with various rifle handling length and supporting length was obtained by the motion capture system. The artificial neural network was established to map the handling length and supporting length to the body balance posture. The human-gun musculoskeletal model calculated the joint reaction forces and muscle activation with different balance postures. <i>Results</i>: The effect of handling length and supporting length on aiming stability and biomechanics was analyzed. The muscle activation pattern was identified, and it could explain 83.8-98.2% of the variance in aiming stability. <i>Conclusions</i>: The outcomes of this study could find the most suitable human-gun parameters for shooters to improve performance and reduce the risk of musculoskeletal injury.</p>","PeriodicalId":519996,"journal":{"name":"Acta of bioengineering and biomechanics","volume":" ","pages":"33-45"},"PeriodicalIF":0.0,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144045954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modelling and analysis of cerebrospinal fluid flow in the human brain - is cerebrospinal fluid an effective protective mechanism during high-impact loading?","authors":"Claudia Sbriglio, Mariusz Ptak, Mateusz Dymek, Marek Sawicki, Artur Kwiatkowski","doi":"10.37190/abb-02591-2025-02","DOIUrl":"10.37190/abb-02591-2025-02","url":null,"abstract":"<p><p><i>Purpose</i>: This study investigates cerebrospinal fluid (CSF) flow dynamics to enhance the understanding of brain biomechanics and the importance of CSF during high-impact loading. <i>Methods</i>: Comparative analyses were conducted using the benchmark model with smoothed particle hydrodynamics (SPH), without cerebrospinal fluid, and with an additional element - the arachnoid trabeculae - which functions as rigid connections between the brain and skull. The numerical modelling of cerebrospinal fluid and the derived conclusions were validated and calibrated through experiments performed in the additional research phase. <i>Results</i>: The research emphasises the challenges of accurately modelling cerebrospinal fluid dynamics and brain biomechanics. The results were unexpected in several ways. Initially, a rigid cortex-skull connection was anticipated to yield results nearly identical to those observed in Hardy's experiments. Even more surprising were the results for the models with cerebrospinal fluid modelled as smoothed particle hydrodynamics and the model without cerebrospinal fluid, which showed almost identical results in comparison to each other. The novel physical experiment with a gelatine insert subjected to controlled loading and numerical model simulations revealed that SPH models exhibited closely resembling fluid displacement, while tetrahedral elements imposed unrealistic rigidity. <i>Conclusions</i>: The simulations and the novel experiment provide key insights into cerebrospinal fluid dynamics during traumatic brain injury. The findings suggest that the protective function of CSF might be less pronounced under extreme conditions than previously assumed. The smoothed particle hydrodynamics method demonstrates clear advantages over tetrahedral finite element approaches by offering superior brain-in-skull flexibility and avoiding the excessive rigidity inherent to traditional finite element models. We concluded that mechanism of brain protection by CSF is performed rather by hydraulic damping than the brain immersion in vast volume of CSF.</p>","PeriodicalId":519996,"journal":{"name":"Acta of bioengineering and biomechanics","volume":"27 1","pages":"143-155"},"PeriodicalIF":0.0,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144370046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative analysis of orthopaedic scaffold fixation methods - a finite element study.","authors":"Anita Gryko, Piotr Prochor","doi":"10.37190/abb-02538-2024-02","DOIUrl":"10.37190/abb-02538-2024-02","url":null,"abstract":"<p><p><i>Purpose</i>: Critical-size bone defects (CSBD) are a serious challenge in current orthopaedics. Natural healing processes are insufficient, leading to complications such as muscle atrophy, joint stiffness, impaired limb function and reduced quality of life. Currently used autologous or allogeneic bone grafts have disadvantages, such as long surgery time, secondary injuries and immunological reactions. A promising alternative in the treatment of CSBD is the use of a scaffold. The key element of the effective use of scaffolds is their proper anchoring in the bone defect. The article presents numerical analyses of the effectiveness of selected anchoring methods of the scaffold in the bone. <i>Methods</i>: Scaffolds were placed in a 60 mm long CSBDs. Four methods of anchoring the scaffold in the bone were selected: locking plate, external ring, intramedullary nail and double anti-rotation wedge. A simulation of the forces generated during the entire gait cycle was performed. The parameters obtained were: Huber Mises Hencky (HMH) max stress, strain energy density (SED), sliding distance, frictional stress and bone-scaffold gap. <i>Results</i>: Based on the conducted research, it was determined that the most effective of the evaluated solutions, in terms of load transfer, were the use of external ring or double anti-rotation wedge. <i>Conclusions</i>: The conducted research confirm that in the treatment of CSBD, an effective solution is the use of a scaffold, which effectiveness can be improved with appropriate anchoring method.</p>","PeriodicalId":519996,"journal":{"name":"Acta of bioengineering and biomechanics","volume":"26 4","pages":"123-136"},"PeriodicalIF":0.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143660295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of backpack loads on shoulder strap tension in male adolescents: a biomechanical study.","authors":"Yunqi Tang, Jiachen Fan, Meilian Lyu, Tao Zhou, Xie Wu, Kezhun Cao, Shutao Wei","doi":"10.37190/abb-02522-2024-02","DOIUrl":"10.37190/abb-02522-2024-02","url":null,"abstract":"<p><p><i>Purpose</i>: The widespread use of heavy backpacks among adolescents raises concerns about the impact on musculoskeletal health. This study aims to investigate the effects of different backpack loads on shoulder strap tension during walking and running, using a springloaded shock-absorbing backpack. <i>Methods</i>: Fifteen healthy male adolescents participated in the study. Each carried a backpack with loads of 3.5 kg, 7 kg and 10.5 kg while walking at 2 m/s and running at 4 m/s. Shoulder strap tension was measured using custom-made tension sensors, and kinematic data were collected with a 3D motion capture system. Statistical Parametric Mapping (SPM) was applied to analyze tension variations across different gait phases. <i>Results</i>: Shoulder strap tension increased significantly with heavier loads during both walking and running (<i>p</i> < 0.001). The tension varied throughout the gait cycle, with distinct patterns observed between walking and running. During walking, tension peaked at mid-stance, while in running, tension decreased during the absorption phase and increased sharply during propulsion. Significant differences between 7 kg and 10.5 kg loads were noted at specific gait intervals ( <i>p</i> < 0.05). <i>Conclusions</i>: Backpack load significantly influences shoulder strap tension, with variations closely linked to gait phases. These findings highlight the importance of ergonomic backpack design, particularly for reducing shoulder strain in adolescents.</p>","PeriodicalId":519996,"journal":{"name":"Acta of bioengineering and biomechanics","volume":"26 4","pages":"51-59"},"PeriodicalIF":0.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143660300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Circadian variability of bioelectric muscle tone in static and dynamic anaerobic exercises in men.","authors":"Aleksandra Stawiarska, Ryszard Gajdosz, Wiesław Chwała, Anna Gajdosz","doi":"10.37190/abb-02527-2024-02","DOIUrl":"10.37190/abb-02527-2024-02","url":null,"abstract":"<p><p><i>Purpose</i>: Physiological processes in the body are characterized by a 24-hour circadian rhythm. The circadian variability of physiological processes affects exercise capacity. The aim of the study was to determine the circadian variability of bioelectric muscle tone in static and dynamic exercises with the use of surface electromyography (sEMG), which allows for the assessment of neuromuscular activity and muscle function during physical activity. <i>Methods</i>: The research sample consisted of 16 men aged 21.6 ± 0.62 years, with intermediate chronotypes, who were not professional athletes. The tests were conducted at 2:00, 10:00, 18:00 and 22:00 and included measurements of bioelectric tension (sEMG) of the vastus lateralis muscle of the right and left limbs during static exercise with maximum voluntary isometric contraction (MVC) and during dynamic exercise, such as the Jumping test - vertical jump with arm swing (CMJ) and without arm swing (ACMJ), as well as during a 10-second cycle ergometer test. The tests were repeated after 24 hours. <i>Results</i>: The circadian periodization of biopotential has a varied course with a noticeable decline in values at night time. The level of bioelectric tension recorded during static exercise did not show significant circadian variability. However, in dynamic exercises, significant variability ( <i>p</i> < 0.05) in bioelectric tension (sEMG) of the vastus lateralis muscle of the left limb during the Jumping test with arm swing (CMJ) was observed between 22:00 and 18:00 in the first series of tests. A tendency to achieve higher average amplitude values was observed at 10:00 in both limbs, with the lowest values observed at 2:00. After 24 hours, the highest bioelectric activity was observed in both limbs at 10:00 during the jump with arm swing (CMJ), while the lowest values in the left limb were observed at 2:00. During the jump without arm swing (ACMJ), the lowest level of bioelectric activity of the tested muscle in the right limb was observed at 2:00. In the 10-second anaerobic cycle ergometer test, significant variability ( <i>p</i> < 0.05) in bioelectric tension of the muscle in the left limb was shown between 18:00 (highest result) and 2:00 (lowest result). After 24 hours, the measurement values were generally lower compared to the results of identical measurements from the first series of tests. <i>Conclusions</i>: the level of bioelectric tension in the studied muscles during anaerobic exercises at different times of the day varies depending on the time and type of workout. The highest sEMG biopotential amplitude values were recorded in the evening and afternoon, while the lowest values were recorded at night time, at 2:00.</p>","PeriodicalId":519996,"journal":{"name":"Acta of bioengineering and biomechanics","volume":"26 4","pages":"111-122"},"PeriodicalIF":0.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143660294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design and application of ISSA-BP neural network model for predicting soft tissue relaxation force.","authors":"Yongli Yan, Teng Ren, Li Ding, Tiansheng Sun","doi":"10.37190/abb-02529-2024-03","DOIUrl":"10.37190/abb-02529-2024-03","url":null,"abstract":"<p><p><i>Purpose</i>: Accurate biomechanical modeling is crucial for enhancing the realism of virtual surgical training. This study addressed the computational cost and complexity associated with traditional viscoelastic models by incorporating neural network algorithms, thereby augmenting the predictive capability of soft tissue modeling. <i>Methods</i>: To address these challenges, the present study proposed a novel biomechanical modeling approach. The approach establishes a relaxation prediction model based on the backpropagation (BP) neural network and optimizes it using an enhanced sparrow search algorithm (ISSA). This hybrid method leverages the dynamic characteristics of forceps to predict the relaxation force of soft tissues more accurately. The ISSA optimizes the model by integrating chaos mapping, nonlinear inertia weight, and vertical-horizontal crossover strategy, which helps overcome the issue of local optima and boosts the predictive performance. <i>Results</i>: The experimental results demonstrated that the <i>R</i> ₂ values reached 0.9956 for the pig kidney and 0.9896 for the pig stomach, indicating the model's exceptional precision in predicting relaxation forces. <i>Conclusions</i>: The relaxation force prediction model based on ISSA-BP neural network provides excellent predictive performance, offering a new and effective strategy for biomechanical modeling of soft tissues in virtual surgical systems.</p>","PeriodicalId":519996,"journal":{"name":"Acta of bioengineering and biomechanics","volume":"26 4","pages":"89-98"},"PeriodicalIF":0.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143660298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of the mechanical properties of muscles in adults in relation to the position of the hip bones - preliminary study.","authors":"Sebastian Szajkowski, Michał Dwornik, Jarosław Pasek, Grzegorz Cieślar","doi":"10.37190/abb-02477-2024-02","DOIUrl":"10.37190/abb-02477-2024-02","url":null,"abstract":"<p><p><i>Purpose</i>: Asymmetry in the form of Lumbo-Pelvic-Hip Complex (LPHC) is a common phenomenon in the adult population. No consensus has been reached in the literature reviewed, as far as the impact of posture defects upon the occurrence of muscle imbalance, faster development of degenerative changes in the joints and pain intensity are concerned. Thus, it needs to be defined clearly in which cases the diagnosis of (LPHC) asymmetry in adults provides the basis for starting rehabilitation. The aim of the study was to determine whether in the case of this asymmetry changes in the viscoelastic and biomechanical properties of LPHC muscles occur. <i>Methods</i>: The study comprised 64 adults, divided into two groups on the basis of physical examination: pelvic symmetrical (<i>n</i> = 34), and pelvic asymmetrical (<i>n</i> = 30). Myotonometric measurements of output parameters: tension, stiffness and elasticity were carried out to assess the mechanical properties of LPHC muscles in both groups. <i>Results</i>: Tension, stiffness and elasticity of the examined muscles, namely: abdominal muscles, rectus femoris muscle, erector muscle of the spine and biceps femoris muscle were measured. The pelvic symmetrical group, and the pelvic asymmetrical group did not differ with statistical significance as regards the comparison between the left and right sides of the body of the subjects. Also, no statistically significant differences in the occurrence of pain were found between the study groups. <i>Conclusions</i>: Our findings have important clinical implications. The asymmetry of LPHC, commonly diagnosed in adults during functional examination for the purpose of physiotherapy, should not provide the basis for starting rehabilitation, in the absence of pain.</p>","PeriodicalId":519996,"journal":{"name":"Acta of bioengineering and biomechanics","volume":"26 4","pages":"19-27"},"PeriodicalIF":0.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143660292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of muscle strength profiles in taekwondo and judo elite athletes.","authors":"Michał Górski, Rafał Kubacki, Krzysztof Buśko","doi":"10.37190/abb-02530-2024-02","DOIUrl":"10.37190/abb-02530-2024-02","url":null,"abstract":"<p><p><i>Purpose</i>: Sports training, of which muscle strength development is a part, should be aimed at optimally preparing athletes for competition. Differences in the demands of judo and taekwondo sports combat lead to different results in developing the strength potential of athletes. The aim of this study was to assess the strength capabilities of athletes training taekwondo and judo. <i>Methods</i>: The study included 14 taekwondo and 17 judo elite athletes. Measurements were taken of the maximum muscle torques developed under static conditions of 20 muscle groups responsible for flexion and extension of the limbs, at the shoulder, elbow, knee, hip joints and trunk flexion and extension. Based on the results, the topography of muscle torques was calculated as the percentage of the ratio of the muscle torques developed at a given joint to the sum of all the torques tested. <i>Results</i>: Judo athletes developed significantly higher values of muscle torques than taekwondo athletes during flexion and extension of the upper limb joints and extension at the hip joint ( <i>p</i> < 0.05). Judo athletes achieved higher topography index values in flexion of the left shoulder joint and extension of both elbow and shoulder joints ( <i>p</i> < 0.05). Taekwondo athletes achieved higher topography index values in flexion of the knee and hip joints of the right and left lower limbs ( <i>p</i> < 0.05). <i>Conclusions</i>: The calculation of muscle topography allowed us to assess the differences in the strength profiles of judo and taekwondo athletes and can provide additional information for evaluating the effects of strength training.</p>","PeriodicalId":519996,"journal":{"name":"Acta of bioengineering and biomechanics","volume":"26 4","pages":"79-88"},"PeriodicalIF":0.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143660297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of material properties in key components of the porcine crystalline lens during overshooting.","authors":"Milad Salimibani, Ali Dahaghin, Agnieszka Boszczyk, Jorge Grasa, Damian Siedlecki","doi":"10.37190/abb-02463-2024-03","DOIUrl":"10.37190/abb-02463-2024-03","url":null,"abstract":"<p><p><i>Purpose</i>: The porcine eye serves as a valuable surrogate for studying human ocular anatomy and physiology because of its close resemblance. This study focuses on the influence of material properties, specifically Young's modulus and Poisson's ratio, on the crystalline lens overshooting amplitude during rapid eye rotation. <i>Methods</i>: The finite element method (FEM) was employed to explore various material property scenarios, and sensitivity analysis was conducted to assess their impact on the mechanical displacement of the crystalline lens apex. The measurements were made of three output parameters: maximum displacement, time of maximum displacement appearance and stabilization time. <i>Results</i>: The results highlight the significance of fine-tuning of the zonule's material properties, particularly Young's modulus, in achieving a reliable model. They suggest that fine-tuning of these parameters can lead to a highly reliable model, enabling in-depth research in the opto-dynamic simulations. <i>Conclusions</i>: Having a complete examination of crystalline lens displacement in <i>ex vivo</i> porcine eye models and detailing crucial factors for accurate modeling will open the path for future studies especially in conditions affected by dynamic aspects of the crystalline lens or in <i>in vivo</i> research.</p>","PeriodicalId":519996,"journal":{"name":"Acta of bioengineering and biomechanics","volume":"26 4","pages":"39-50"},"PeriodicalIF":0.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143660291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Finite element analysis of double diamond lattice structured lumbar interbody fusion cage with different biomaterials.","authors":"D Athikesavan, M S Alphin, S Meganathan","doi":"10.37190/abb-02488-2024-05","DOIUrl":"10.37190/abb-02488-2024-05","url":null,"abstract":"<p><p><i>Purpose</i>: In recent years, low back pain has emerged as a significant global health issue, largely attributed to the prevalence of lumbar disc degeneration (LDD). This increases high demand on implant manufacturing due to the uniqueness of each patient's anthropometry. Which creates a surge in the implant design and its performance study. This work employed finite element analysis to evaluate the efficacy of Interbody cage fusion in combination with different biostructures and biomaterials. <i>Methods</i>: The Lumbar Model was created by incorporating a surgical implant cage that featured three different lattice architectures using Boolean operations. We constructed four models, one model that was not altered and three models that underwent surgical procedures. The surgical models consist of three types of lattice implants are double diamond (DD), double diamond centre support (DDCS), double diamond side support (DDSS). <i>Results</i>: The results indicate that the double diamond (DD) lattice-structured polyether ether ketone (PEEK) material implant experiences the most deformation, measuring 0.67 mm, when subjected to axial rotation motion. An analysis indicates the implant made with the DDCS lattice structure and Ti-6Al-4V material is subjected to the least stress - it stood at 75.47 MPa as the smallest stress level recorded. <i>Conclusions</i>: The result of endplate von mises stress shows the PEEK material with DDCS lattice structured implant have low stress. Ti-6Al-4V and Stainless steel having high stress of 20 MPa on endplates. Comparatively Ti-6Al-4V having very good response with literature data. These results are providing insights towards the selection of implant in future medical treatment.</p>","PeriodicalId":519996,"journal":{"name":"Acta of bioengineering and biomechanics","volume":"26 4","pages":"3-18"},"PeriodicalIF":0.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143660301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}