Predicting net joint moments during a weightlifting exercise with a neural network model
The purpose of this study was to develop and train a Neural Network (NN) that uses barbell mass and motions to predict hip, knee, and ankle Net Joint Moments (NJM) during a weightlifting exercise. Seven weightlifters performed two cleans at 85% of their competition maximum while ground reaction forces and 3-D motion data were recorded. An inverse dynamics procedure was used to calculate hip, knee, and ankle NJM. Vertical and horizontal barbell motion data were extracted and, along with barbell mass, used as inputs to a NN. (Source: Journal of Biomechanics)
Source: Journal of Biomechanics - April 24, 2018 Category: Biomedical Science Authors: Kristof Kipp, Matthew Giordanelli, Christopher Geiser Tags: Short communication Source Type: research
Experimental evaluation of current and novel approximations of articular surfaces of the ankle joint
Kinematics and flexibility properties of both natural and replaced ankle joints are affected by the geometry of the articulating surfaces. Recent studies proposed an original saddle-shaped, skewed, truncated cone with laterally oriented apex, as tibiotalar contact surfaces for ankle prosthesis. The goal of this study was to compare in-vitro this novel design with traditional cylindrical or medially centered conic geometries in terms of their ability to replicate the natural ankle joint mechanics. (Source: Journal of Biomechanics)
Source: Journal of Biomechanics - April 24, 2018 Category: Biomedical Science Authors: Claudio Belvedere, Sorin Siegler, Andrea Ensini, Jason Toy, Paolo Caravaggi, Ramya Namani, Luca Giuseppe Princi, Stefano Durante, Alberto Leardini Tags: Short communication Source Type: research
Effect of shoulder model complexity in upper-body kinematics analysis of the golf swing
The golf swing is a complex full body movement during which the spine and shoulders are highly involved. In order to determine shoulder kinematics during this movement, multibody kinematics optimization (MKO) can be recommended to limit the effect of the soft tissue artifact and to avoid joint dislocations or bone penetration in reconstructed kinematics. Classically, in golf biomechanics research, the shoulder is represented by a 3 degrees-of-freedom model representing the glenohumeral joint. More complex and physiological models are already provided in the scientific literature. (Source: Journal of Biomechanics)
Source: Journal of Biomechanics - April 24, 2018 Category: Biomedical Science Authors: M. Bourgain, S. Hybois, P. Thoreux, O. Rouillon, P. Rouch, C. Sauret Tags: Short communication Source Type: research
Mechanics of anesthetic needle penetration into human sciatic nerve
Nerve blocks are frequently performed by anesthesiologists to control pain. For sciatic nerve blocks, the optimal placement of the needle tip between its paraneural sheath and epineurial covering is challenging, even under ultrasound guidance, and frequently results in nerve puncture. We performed needle penetration tests on cadaveric isolated paraneural sheath (IPS), isolated nerve (IN), and the nerve with overlying paraneural sheath (NPS), and quantified puncture force requirement and fracture toughness of these specimens to assess their role in determining the clinical risk of nerve puncture. (Source: Journal of Biomechanics)
Source: Journal of Biomechanics - April 24, 2018 Category: Biomedical Science Authors: Joseph E. Pichamuthu, Spandan Maiti, Maria G. Gan, Nicole M. Verdecchia, Steven L. Orebaugh, David A. Vorp Source Type: research
A quantitative study on magnesium alloy stent biodegradation
In this study, the effects of multi-dimensional corrosion were studied using experiment quantitatively, then a phenomenological corrosion model was developed to consider these effects. (Source: Journal of Biomechanics)
Source: Journal of Biomechanics - April 24, 2018 Category: Biomedical Science Authors: Yuanming Gao, Lizhen Wang, Xuenan Gu, Zhaowei Chu, Meng Guo, Yubo Fan Source Type: research
Confirmation bias affects user perception of knee braces
This study assessed confirmation bias in 18 healthy young adults walking in knee braces. (Source: Journal of Biomechanics)
Source: Journal of Biomechanics - April 24, 2018 Category: Biomedical Science Authors: Brittany Balsamo, Mark D. Geil, Rebecca Ellis, Jianhua Wu Tags: Short communication Source Type: research
Kinematics and Kinetics of the Shoe during Human Slips
Slips and falls are among the leading causes of occupational injuries. Slips, trips and falls (STF) lead to over 9 million treated cases in hospital emergency departments (Centers for Disease Control and Prevention, 2017) and more than one-fourth of the non-fatal occupational injuries in 2015 (U.S. Department of Labor- Bureau of Labor Statistics, 2016). A survey among young adults indicated that about half of the falling accidents are caused by slips (Heijnen and Rietdyk, 2016). STF prevention programs often recommend use of slip-resistant footwear to reduce slip risk (Bell et al., 2008). (Source: Journal of Biomechanics)
Source: Journal of Biomechanics - April 24, 2018 Category: Biomedical Science Authors: Arian Iraqi, Raki é Cham, Mark S. Redfern, Natasa S. Vidic, Kurt E. Beschorner Source Type: research
Microscale Frictional Strains Determine Chondrocyte Fate in Loaded Cartilage
Mounting evidence suggests that altered lubricant levels within synovial fluid have acute biological consequences on chondrocyte homeostasis. While these responses have been connected to increased friction, the mechanisms behind this response remain unknown. Here, we combine a frictional bioreactor with confocal elastography and image-based cellular assays to establish the link between cartilage friction, microscale shear strain, and acute, adverse cellular responses. Our incorporation of cell-scale strain measurements reveals that elevated friction generates high shear strains localized near the tissue surface, and that t...
Source: Journal of Biomechanics - April 24, 2018 Category: Biomedical Science Authors: Edward D. Bonnevie, Michelle L. Delco, Lena R. Bartell, Naveen Jasty, Itai Cohen, Lisa A. Fortier, Lawrence J. Bonassar Source Type: research
Predicting net joint moments during a weightlifting exercise with a neural network model
The purpose of this study was to develop and train a Neural Network (NN) that uses barbell mass and motions to predict hip, knee, and ankle Net Joint Moments (NJM) during a weightlifting exercise. Seven weightlifters performed two cleans at 85% of their competition maximum while ground reaction forces and 3-D motion data were recorded. An inverse dynamics procedure was used to calculate hip, knee, and ankle NJM. Vertical and horizontal barbell motion data were extracted and, along with barbell mass, used as inputs to a NN. (Source: Journal of Biomechanics)
Source: Journal of Biomechanics - April 24, 2018 Category: Biomedical Science Authors: Kristof Kipp, Matthew Giordanelli, Christopher Geiser Tags: Short communication Source Type: research
Experimental evaluation of current and novel approximations of articular surfaces of the ankle joint
Kinematics and flexibility properties of both natural and replaced ankle joints are affected by the geometry of the articulating surfaces. Recent studies proposed an original saddle-shaped, skewed, truncated cone with laterally oriented apex, as tibiotalar contact surfaces for ankle prosthesis. The goal of this study was to compare in-vitro this novel design with traditional cylindrical or medially centered conic geometries in terms of their ability to replicate the natural ankle joint mechanics. (Source: Journal of Biomechanics)
Source: Journal of Biomechanics - April 24, 2018 Category: Biomedical Science Authors: Claudio Belvedere, Sorin Siegler, Andrea Ensini, Jason Toy, Paolo Caravaggi, Ramya Namani, Luca Giuseppe Princi, Stefano Durante, Alberto Leardini Tags: Short communication Source Type: research
Effect of shoulder model complexity in upper-body kinematics analysis of the golf swing
The golf swing is a complex full body movement during which the spine and shoulders are highly involved. In order to determine shoulder kinematics during this movement, multibody kinematics optimization (MKO) can be recommended to limit the effect of the soft tissue artifact and to avoid joint dislocations or bone penetration in reconstructed kinematics. Classically, in golf biomechanics research, the shoulder is represented by a 3 degrees-of-freedom model representing the glenohumeral joint. More complex and physiological models are already provided in the scientific literature. (Source: Journal of Biomechanics)
Source: Journal of Biomechanics - April 24, 2018 Category: Biomedical Science Authors: M. Bourgain, S. Hybois, P. Thoreux, O. Rouillon, P. Rouch, C. Sauret Tags: Short communication Source Type: research
Mechanics of anesthetic needle penetration into human sciatic nerve
Nerve blocks are frequently performed by anesthesiologists to control pain. For sciatic nerve blocks, the optimal placement of the needle tip between its paraneural sheath and epineurial covering is challenging, even under ultrasound guidance, and frequently results in nerve puncture. We performed needle penetration tests on cadaveric isolated paraneural sheath (IPS), isolated nerve (IN), and the nerve with overlying paraneural sheath (NPS), and quantified puncture force requirement and fracture toughness of these specimens to assess their role in determining the clinical risk of nerve puncture. (Source: Journal of Biomechanics)
Source: Journal of Biomechanics - April 24, 2018 Category: Biomedical Science Authors: Joseph E. Pichamuthu, Spandan Maiti, Maria G. Gan, Nicole M. Verdecchia, Steven L. Orebaugh, David A. Vorp Source Type: research
A quantitative study on magnesium alloy stent biodegradation
In this study, the effects of multi-dimensional corrosion were studied using experiment quantitatively, then a phenomenological corrosion model was developed to consider these effects. (Source: Journal of Biomechanics)
Source: Journal of Biomechanics - April 24, 2018 Category: Biomedical Science Authors: Yuanming Gao, Lizhen Wang, Xuenan Gu, Zhaowei Chu, Meng Guo, Yubo Fan Source Type: research
Confirmation bias affects user perception of knee braces
This study assessed confirmation bias in 18 healthy young adults walking in knee braces. (Source: Journal of Biomechanics)
Source: Journal of Biomechanics - April 24, 2018 Category: Biomedical Science Authors: Brittany Balsamo, Mark D. Geil, Rebecca Ellis, Jianhua Wu Tags: Short communication Source Type: research
Proteoglycans contribute locally to swelling, but globally to compressive mechanics, in intact cervine medial meniscus
Loss of charged proteoglycans in the knee meniscus, which aid in the support of compressive loads by entraining water, is an effect of degeneration and is often associated with osteoarthritis. In healthy menisci, proteoglycan content is highest in the inner white zone and decreases towards the peripheral red zone. We hypothesized that loss of proteoglycans would reduce both osmotic swelling and compressive stiffness, spatially localized to the avascular white zone of the meniscus. This hypothesis was tested by targeted enzymatic digestion of proteoglycans using hyaluronidase in intact cervine medial menisci. (Source: Journal of Biomechanics)
Source: Journal of Biomechanics - April 23, 2018 Category: Biomedical Science Authors: Arthur J. Michalek, Laurel Kuxhaus, Daniel Jaremczuk, Nicole L. Zaino Source Type: research
