Magdalena Stania, Ewa Emich-Widera, Anna Kamieniarz-Olczak, Beata Kazek, Martyna Swatowska-Wenglarczyk, Grzegorz Juras
BACKGROUND: Instrumented measurements of postural control provide a more accurate insight into the motor development of children with autism. This study aimed to identify postural control deficits in autistic children during quiet standing before and after transient locomotor task. It was hypothesized that the parameters that characterize the trajectory of center of foot pressure (COP) displacement would be higher in autistic children compared to typically developing children. METHODS: Sixteen autistic children aged 6-10 but without a comorbidity diagnosis, were enrolled in the study group...
April 12, 2024: Clinical Biomechanics
James W Scott, K C Geoffrey Ng, Alexander D Liddle, Jonathan R T Jeffers
BACKGROUND: Knowing the mechanical properties of trabecular bone is critical for many branches of orthopaedic research. Trabecular bone is anisotropic and the principal trabecular direction is usually aligned with the load it transmits. It is therefore critical that the mechanical properties are measured as close as possible to this direction, which is often perpendicular to a curved articulating surface. METHODS: This study presents a method to extract trabecular bone cores perpendicular to a curved articulating surface of the distal femur...
April 10, 2024: Clinical Biomechanics
Krishnan Sircar, Maximilian Weber, Sebastian G Walter, Nadine Ott, Andreas Prescher, Peer Eysel, Nikolaus Kernich
BACKGROUND: The application of expandable titanium-cages has gained widespread use in vertebral body replacement for indications such as burst fractures, tumors and infectious destruction. However, torque forces necessary for a satisfactory expansion of these implants and for subsidence of them into the adjacent vertebrae are unknown within the osteoporotic spine. METHODS: Six fresh-frozen human, osteoporotic, lumbar spines were dorsally instrumented with titanium implants (L2-L4) and a partial corpectomy of L3 was performed...
April 9, 2024: Clinical Biomechanics
Do Weon Lee, Hyuk-Soo Han, Du Hyun Ro
BACKGROUND: High tibial osteotomy is an established surgical option for medial compartment osteoarthritis of the knee with varus alignment. It can be divided into open wedge and closing wedge by operative technique. Although they have fundamental differences, little is known about the biomechanical consequences of the two surgical methods. METHODS: Thirty-eight patients with medial compartment osteoarthritis who underwent high tibial osteotomy (19 open-wedge and 19 closing-wedge) were retrospectively reviewed...
April 5, 2024: Clinical Biomechanics
R Jamil Pugh, Rosemary D Higgins, Hua Min, Clinton J Wutzke, Andrew A Guccione
BACKGROUND: Individuals with Parkinson's disease are challenged in making turns while walking, evidenced by reduced intersegmental coordination and reduced dynamic postural stability. Although overground locomotor training previously improved ambulation among people with Parkinson's disease, its effect on walking turns remained unknown. We sought to understand the effects of overground locomotor training on walking turns among individuals with mild-Parkinson's disease. METHODS: Twelve participants with Parkinson's (7 Males/5 Females; Age: 68...
April 3, 2024: Clinical Biomechanics
S P Shultz, S M Kung, A C Atack, A N Buck, R Mahaffey
BACKGROUND: Obesity impacts a child's ability to walk with resulting biomechanical adaptations; however, existing research has not comprehensively compared differences across the gait cycle. We examined differences in lower extremity biomechanics across the gait cycle between children with and without obesity at three walking speeds. METHODS: Full gait cycles of age-matched children with obesity (N = 10; BMI: 25.7 ± 4.2 kg/m2 ) and without obesity (N = 10; BMI: 17...
March 29, 2024: Clinical Biomechanics
Tobias Schöbel, Maximilian Gemkow, Toni Wendler, Stefan Schleifenbaum, Sabine Löffler, Jan Theopold, Pierre Hepp
BACKGROUND: Stability is regarded as an important factor for proper healing and avoiding secondary dislocation in osteoporotic fractures of the proximal humerus. Several surgical techniques have been proposed for treatment, including intramedullary nail osteosynthesis and locking plate fixation. This study introduces a novel approach that combines both techniques and compares its primary stability with conventional methods. METHODS: The study involved 25 osteoporotic humeri with two-part fracture models, which were randomly assigned to locking-plate fixation, intramedullary nailing, or a combination of both techniques...
March 28, 2024: Clinical Biomechanics
Yuzhu Yang, Yuan Guo, Changjiang Wang, Xushu Zhang, Kai Zhang, Binping Ji
BACKGROUND: Unicompartmental knee arthroplasty is an effective treatment for knee osteoarthritis, but it has the risk of failure, and the installation position of the prosthesis is one of the factors affecting the failure. There are few biomechanical studies on the installation angle of unicompartmental knee prosthesis. METHODS: Constructed a finite element model of a normal human knee joint, and the validity of the model was verified by stress and front anterior methods...
March 24, 2024: Clinical Biomechanics
Ryota Toyohara, Toshiro Ohashi
BACKGROUND: Sacroiliac joints are affected by mechanical environments; the joints are formed under mechanical stimulation, receive impact of walking between the upper and lower parts of the bodies and can be a cause of pain due to non-physiological loads. However, there are so far very few studies that reviewed biomechanics of physiological and pathological sacroiliac joints. This review article aims to describe the current sacroiliac joint biomechanics. METHODS: Previous original papers have been summarized based on three categories: articular surface structure, sacroiliac joint motion and sacroiliac joint dysfunction and treatments...
March 21, 2024: Clinical Biomechanics
José Luis Alaniz-Arcos, Xochiquetzalli Tejeda Castellanos, Carlos Maximiliano Sánchez Medina, Horacio Márquez González, Ma Elena Ortiz Cornejo, Juliette Marie Brito Suárez, Claudia Gutiérrez Camacho
BACKGROUND: Peripheral neuropathy due to chemotherapeutic drugs causes alterations in ankle movement during gait. This study aimed to describe the spatiotemporal parameters and ankle kinematics during gait in schoolchildren with acute lymphoblastic leukemia with clinically suspected peripheral neuropathy. METHODS: In children with acute lymphoblastic leukemia in the maintenance phase, we calculated spatiotemporal and kinematic parameters of the ankle during gait using Kinovea® software...
May 2024: Clinical Biomechanics
Keita Honda, Yusuke Sekiguchi, Dai Owaki, Ryusuke Okamoto, Shino Inuzuka, Norihiro Morimoto, Shin-Ichi Izumi
BACKGROUND: Reduced ankle quasi-joint stiffness affects propulsion in the paretic side of patients with hemiparesis, contributing to gait asymmetry. We investigated whether the use of an ankle-foot orthosis with dorsiflexion resistance to compensate for reduced stiffness would increase quasi-joint stiffness and spatiotemporal symmetry in patients with hemiparesis. METHODS: Seventeen patients walked along a 7-m walkway in both ankle-foot orthosis with dorsiflexion resistance and control (i...
May 2024: Clinical Biomechanics
Elke Warmerdam, Dominik Horn, Ramona Filip, Kolja Freier, Bergita Ganse, Carolina Classen
BACKGROUND: The ability to walk safely after head and neck reconstruction with fibular free flaps in tumor surgery is a high priority for patients. In addition, surgeons and patients require objective knowledge of the functional donor-site morbidity. However, the effects of fibular free flap surgery on gait asymmetries have only been studied for step length and stance duration. This study analyses whether patients who have undergone fibular free flap reconstruction have enduring gait asymmetries compared to age-matched controls...
May 2024: Clinical Biomechanics
G E Giddins, S Sassi
BACKGROUND: The aim was to assess the direction of distal radius fractures and their relationship to the ulnar head. METHODS: We reviewed the 160 wrist radiographs. The fracture line was measured on the postero-anterior and lateral radiographs relative to the long axis of the forearm and the relationship to the ulnar head. FINDINGS: PA radiographs: the fracture line ran distal ulnar to proximal radial (ulnar to radial) in 11%, transverse in 74% and distal radial to proximal ulnar (radial to ulnar) in 16%...
May 2024: Clinical Biomechanics
Shuai Wang, Junzhe Gao, Liangpeng Lai, Xiaojing Zhang, Xiaofeng Gong, Heng Li, Yong Wu
BACKGROUND: The majority of the ankle osteoarthritis cases are posttraumatic and affect younger patients with a longer projected life span. Hence, joint-preserving surgery, such as supramalleolar osteotomy becomes popular among young patients, especially those with asymmetric arthritis due to alignment deformities. However, there is a lack of biomechanical studies on postoperative evaluation of stress at ankle joints. We aimed to construct a verifiable finite element model of the human hindfoot, and to explore the effect of different osteotomy parameters on the treatment of varus ankle arthritis...
May 2024: Clinical Biomechanics
Kentaro Watanabe, Yuta Koshino, Kosumi Nakagawa, Tomoya Ishida, Satoshi Kasahara, Mina Samukawa, Harukazu Tohyama
BACKGROUND: Perceived instability is a primary symptom among individuals with chronic ankle instability. However, the relationship between joint kinematics during landing remains unclear. Therefore, we investigated the relationships between landing kinematics and perceived instability in individuals with chronic ankle instability. METHODS: In 32 individuals with chronic ankle instability, we recorded ankle, knee, and hip joint angles during a single-leg drop landing...
April 2024: Clinical Biomechanics
Ryan M Sicard, Dennis O Frank-Ito
BACKGROUND: The nose is a viable pathway for topical drug delivery to the olfactory cleft for treatment of obstructive smell loss and nose-to-brain drug delivery. This study investigates how variations in nasal vestibule morphology influence intranasal spray drug transport to the olfactory cleft and olfactory roof/bulb regions. METHODS: The unilateral nasal vestibule morphology in three healthy subjects with healthy normal nasal anatomy was classified as Elongated (Subject DN001), Notched (Subject DN002), and Standard (Subject DN003)...
March 13, 2024: Clinical Biomechanics
Xiyao Shan, Shun Otsuka, Tomohito Okubo, Takao Takeuchi, Kaori Fukushige, Munekazu Naito
BACKGROUND: Hamstring muscles are the most frequently reported sites of muscle strain injuries, especially near the bi-articular muscles' myotendinous junction, where aponeurosis provides a connective tissue network linking muscle fibers to the tendon. This study aimed to investigate the reliability and site-specific differences of hamstring aponeuroses under different conditions (formalin and urea) using MyotonPRO. METHODS: Eight hamstring muscle groups were dissected from four human cadavers (two males and two females) aged 83-93 years...
March 13, 2024: Clinical Biomechanics
Paige E Rice, Gabriel A Pate, Ryan D Hill, Paul DeVita, Stephen P Messier
BACKGROUND: Obesity and knee osteoarthritis adversely affect activities of daily living in older adults. Together, the complexities of their interaction on mobility, including stair negotiation, are unresolved. The purpose of this study was to determine the relationship between obesity, pain, and stair negotiation in older adults with knee osteoarthritis. METHODS: Older adults with symptomatic knee osteoarthritis and overweight or obesity participated in the study (n = 28; age range = 57...
March 12, 2024: Clinical Biomechanics
Alex Nilius, Derek R Dewig, Christopher D Johnston, Brian G Pietrosimone, J Troy Blackburn
BACKGROUND: Quadriceps dysfunction is common following anterior cruciate ligament reconstruction and contributes to aberrant gait biomechanics. Changes in quadriceps composition also occur in these patients including greater concentrations of non-contractile tissue. The purpose of this study was to evaluate associations between quadriceps composition, function, and gait biomechanics in individuals with anterior cruciate ligament reconstruction. METHODS: Forty-eight volunteers with anterior cruciate ligament reconstruction completed gait biomechanics and quadriceps function and composition assessments...
March 12, 2024: Clinical Biomechanics
Emilie Mathieu, David Gasq, Sylvain Crémoux, Célia Delcamp, Camille Cormier, Philippe Pudlo, David Amarantini
BACKGROUND: Characterization of motor deficits after brain injury is important for rehabilitation personalization. While studies reported abnormalities in the kinematics of paretic and non-paretic elbow extension for patients with brain injuries, kinematic analysis is not sufficient to explore how patients deal with musculoskeletal redundancy and the energetic aspect of movement execution. Conversely, interarticular coordination and movement kinetics can reflect patients' motor strategies...
March 7, 2024: Clinical Biomechanics
Fetch more papers »
Fetching more papers... Fetching...
Remove bar
Read by QxMD icon Read

Save your favorite articles in one place with a free QxMD account.


Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"

We want to hear from doctors like you!

Take a second to answer a survey question.