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Articles 1 - 16 of 16
Full-Text Articles in Medicine and Health Sciences
Lower Extremity Prostheses Related Biomechanics, Valeria Chiu, Ming-Chuan Lin
Lower Extremity Prostheses Related Biomechanics, Valeria Chiu, Ming-Chuan Lin
Rehabilitation Practice and Science
During heel strike, a prosthetic foot must perform ground-reaction force shock absorption, and thereafter, must provide control of the smooth-rhythm plantar flexion movement. During the midstance phase, the foot must provide the controlled advancement of the tibia. During the terminal stance, the anterior part of the foot must act as a hard rocker to provide progression and roll over the toe and to allow center of gravity switching to the opposite site as the tibia advances. The biomechanics of the four-bar linkage knee simulates the motion of the actual human knee joint. It can be discussed by analyzed by five …
In Vitro Manual Therapy And Biorobotic Simulation Of Glenohumeral Joint Mobilization Techniques, Hunter Johnson Smith
In Vitro Manual Therapy And Biorobotic Simulation Of Glenohumeral Joint Mobilization Techniques, Hunter Johnson Smith
Theses and Dissertations (ETD)
Physical therapists (PT) employ mobilization techniques for restoring range of motion to joints. Few studies have attempted to quantify the biomechanics of manual therapy on the glenohumeral (GH) joint. The objectives of this study were to develop an in vitro protocol to determine the biomechanical effects of joint mobilization on the GH joint, and to then simulate these mobilizations in the University of Tennessee Health Science Center (UTHSC) Joint Implant Biomechanics Laboratory’s Robotic Testing Platform (RTP).
The GH joint is an incredibly shallow socket joint. This gives the joint an unusually large range of motion (ROM) compared to other ball …
Correlation Of Shoulder And Elbow Kinetics With Ball Velocity In College Baseball Pitchers, Eric Post
Correlation Of Shoulder And Elbow Kinetics With Ball Velocity In College Baseball Pitchers, Eric Post
Theses and Dissertations
Specific injuries at the elbow and glenohumeral joints have been linked to several kinetic variables that occur throughout the throwing motion. Ulnar collateral ligament (UCL) sprains have been linked to excessive elbow valgus and shoulder external rotation torques occurring during the late-cocking phase of throwing. Shoulder external rotation torque during the late arm-cocking phase and shoulder distraction forces during the deceleration phase contribute to tears of the labrum. Additionally, it is believed that the peak distraction force generated during the arm deceleration phase also contributes to SLAP tears and rotator cuff pathologies. Very little research has been done to directly …
Design And Development Of A Novel Expanding Pedicle Screw For Use In The Osteoporotic Lumbar Spine, Parham Rasoulinejad
Design And Development Of A Novel Expanding Pedicle Screw For Use In The Osteoporotic Lumbar Spine, Parham Rasoulinejad
Electronic Thesis and Dissertation Repository
Pedicle screws are commonly utilized in spinal surgery; however, traditional designs often do not provide adequate fixation in osteoporotic spines. The objective of this thesis was to develop a novel expanding screw for use in osteoporotic lumbar pedicles. Helical screws capable of expanding post insertion were built on a rapid prototype machine. A materials testing machine performed axial load to failure tests in both Sawbones and cadaveric specimens comparing the new design to traditional screws (rate = 10mm/min to 20 mm). Output parameters included yield load, ultimate load, stiffness, energy to failure and total energy. The expanding screw showed a …
Complex Shoulder Instability: The Role Of The Latarjet Coracoid Transfer, Ryan Degen
Complex Shoulder Instability: The Role Of The Latarjet Coracoid Transfer, Ryan Degen
Electronic Thesis and Dissertation Repository
Recurrent anterior shoulder instability is a common clinical entity often requiring surgical stabilization. Recurrence rates following soft-tissue stabilization procedures are moderately high and have been attributed to associated bony defects of either the glenoid or humeral head. Complex shoulder instability, defined as instability associated with bony defects around the shoulder, is a challenging clinical problem. The Latarjet coracoid transfer has been proposed as a treatment option and its resultant stabilizing effects have been explored in this biomechanical cadaver-based study.
For both glenoid and humeral head defects, the Latarjet coracoid transfer adequately stabilized the shoulder, outperforming other procedures often utilized for …
Effects Of Lateral Shoe Wedges And Toe-In Foot Progression Angles On The Biomechanics Of Knee Osteoarthritis During Stationary Cycling, Jacob Kale Gardner
Effects Of Lateral Shoe Wedges And Toe-In Foot Progression Angles On The Biomechanics Of Knee Osteoarthritis During Stationary Cycling, Jacob Kale Gardner
Doctoral Dissertations
Exercise is important for individuals with knee osteoarthritis (OA) but certain activities can be painful and discourage participation. Cycling is commonly prescribed for OA but practically no previous literature exists. Due to their altered knee kinematics, OA patients may be at greater risk of OA progression or other knee injuries during cycling. The purpose of Study One was to investigate the effects of lateral wedges on knee joint biomechanics and pain in patients with medial compartment knee OA. The purpose of Study Two was to investigate the effects of toe-in foot progression angles on the same variables. Thirteen OA subjects …
The Development And Application Of A Custom Robotic Biomechanical Testing Platform Employing Real-Time Load-Control To Compare Spinal Biomechanical Testing Protocols: Pure Moment, Ideal Follower Load, And A Novel Trunk Weight Protocol, Charles Ramsey Bennett
Theses and Dissertations (ETD)
The human lumbar spine has been the subject of biomechanical study for many decades owing to the numerous medical cases resulting in the development of various corrective surgical procedures and medical devices intended to relieve patient discomfort. Spinal biomechanics is a broad field containing but not limited to the in vitro study of cadaveric tissue utilizing testing platforms used to apply motion- or load-profiles to tissue in the investigation of the various kinetic or kinematic responses, respectively. The particular arena field of this research concerns the field of robotics as it applies to testing platforms and how they are applied …
Effects Of Footstrike Pattern On Low Back Posture, Shock Attenuation, And Comfort During Running, Traci L. Delgado, Emilia Kubera-Shelton, Robert R. Robb
Effects Of Footstrike Pattern On Low Back Posture, Shock Attenuation, And Comfort During Running, Traci L. Delgado, Emilia Kubera-Shelton, Robert R. Robb
UNLV Theses, Dissertations, Professional Papers, and Capstones
Purpose: Barefoot running (BF) is popular in the running community. Biomechanical changes occur with BF, especially when initial contact changes from rearfoot strike (RFS) to forefoot strike (FFS). In addition, changes in lumbar spine range of motion (ROM), particularly involving lumbar lordosis, have been associated with increased low back pain (LBP). However it is not known how changing from RFS to FFS affects lumbar lordosis or LBP. Thus, the purpose of this study was to determine if a change from RFS to FFS would change lumbar lordosis, and/or decrease shock attenuation, and/or change comfort levels in healthy recreational/experienced runners.
Methods: …
Determination Of Biomechanical Differences Between Elite And Novice San Shou Female Athletes, Chuanyin Jiang, Michael W. Olson, Li Li
Determination Of Biomechanical Differences Between Elite And Novice San Shou Female Athletes, Chuanyin Jiang, Michael W. Olson, Li Li
Department of Health Sciences and Kinesiology Faculty Publications
Determining the key factors in athletic performance is important for developing the technique and strength of athletes. Many martial arts forms have been studied, but a relatively new form of martial arts competition, San Shou, has not been analyzed. The purpose of this study was to determine key attributes necessary in the development of the San Shou athlete, particularly in female participants. Six elite and six novice competitors performed 30 continuous repetitions of cyclic extension and flexion of the trunk segment, knee joints, and elbows joints at two velocities, 60°/second and 180°/second, using an isokinetic dynamometer. Variables of interest were …
Correlations Between Internal And External Power Outputs During Weightlifting Exercise, Kristof Kipp, Chad Harris, Michelle B. Sabick
Correlations Between Internal And External Power Outputs During Weightlifting Exercise, Kristof Kipp, Chad Harris, Michelle B. Sabick
Exercise Science Faculty Research and Publications
Identifying loads that maximize mechanical power is important because training at such loads may optimize gains in dynamic athletic performance. The purpose of this study was to examine correlations between measures of external mechanical power output and internal mechanical joint power output across different loads during a weightlifting exercise. Ten subjects performed 3 sets of the clean exercise at 65, 75, and 85% of 1 repetition maximum (1RM). Peak external mechanical power output was calculated with 4 commonly used methods, whereas an inverse dynamics approach was used to calculate peak internal mechanical power output for the hip, knee, and ankle …
An Informational Algorithm As The Basis For Perception-Action Control Of The Instantaneous Axes Of The Knee, Wangdo Kim, Margarida M. Espanha, António P. Veloso, Duarte Araújo, Filipa João, Luis Carrão, Sean S. Kohles
An Informational Algorithm As The Basis For Perception-Action Control Of The Instantaneous Axes Of The Knee, Wangdo Kim, Margarida M. Espanha, António P. Veloso, Duarte Araújo, Filipa João, Luis Carrão, Sean S. Kohles
Mechanical and Materials Engineering Faculty Publications and Presentations
Traditional locomotion studies emphasize an optimization of the desired movement trajectories while ignoring sensory feedback. We propose an information based theory that locomotion is neither triggered nor commanded but controlled. The basis for this control is the information derived from perceiving oneself in the world. Control therefore lies in the human-environment system. In order to test this hypothesis, we derived a mathematical foundation characterizing the energy that is required to perform a rotational twist, with small amplitude, of the instantaneous axes of the knee (IAK). We have found that the joint’s perception of the ground reaction force may be replaced …
What's New In Adult Reconstructive Knee Surgery., Carl A Deirmengian, Jess H Lonner
What's New In Adult Reconstructive Knee Surgery., Carl A Deirmengian, Jess H Lonner
Rothman Institute Faculty Papers
No abstract provided.
The Use Of X-Shaped Cross-Link In Posterior Spinal Constructs Improves Stability In Thoracolumbar Burst Fracture: A Finite Element Analysis, Alizadeh M, Kadir Mr, Fadhli Mm, Fallahiarezoodar A, Azmi B, Murali Malliga Raman, Kamarul T
The Use Of X-Shaped Cross-Link In Posterior Spinal Constructs Improves Stability In Thoracolumbar Burst Fracture: A Finite Element Analysis, Alizadeh M, Kadir Mr, Fadhli Mm, Fallahiarezoodar A, Azmi B, Murali Malliga Raman, Kamarul T
Murali Malliga Raman
Posterior instrumentation is a common fixation method used to treat thoracolumbar burst fractures. However, the role of different cross-link configurations in improving fixation stability in these fractures has not been established. A 3D finite element model of T11-L3 was used to investigate the biomechanical behavior of short (2 level) and long (4 level) segmental spine pedicle screw fixation with various cross-links to treat a hypothetical L1 vertebra burst fracture. Three types of cross-link configurations with an applied moment of 7.5 Nm and 200 N axial force were evaluated. The long construct was stiffer than the short construct irrespective of whether …
Micro-Biomechanics Of The Kebara 2 Hyoid And Its Implications For Speech In Neanderthals, Ruggero D'Anastasio, Stephen Wroe, Claudio Tuniz, Lucia Mancini, Deneb T. Cesana, Diego Dreossi, Mayoorendra Ravichandiran, Marie Attard, William C. H Parr, Anne Agur, Luigi Capasso
Micro-Biomechanics Of The Kebara 2 Hyoid And Its Implications For Speech In Neanderthals, Ruggero D'Anastasio, Stephen Wroe, Claudio Tuniz, Lucia Mancini, Deneb T. Cesana, Diego Dreossi, Mayoorendra Ravichandiran, Marie Attard, William C. H Parr, Anne Agur, Luigi Capasso
Faculty of Science, Medicine and Health - Papers: part A
The description of a Neanderthal hyoid from Kebara Cave (Israel) in 1989 fuelled scientific debate on the evolution of speech and complex language. Gross anatomy of the Kebara 2 hyoid differs little from that of modern humans. However, whether Homo neanderthalensis could use speech or complex language remains controversial. Similarity in overall shape does not necessarily demonstrate that the Kebara 2 hyoid was used in the same way as that of Homo sapiens. The mechanical performance of whole bones is partly controlled by internal trabecular geometries, regulated by bone-remodelling in response to the forces applied. Here we show that the …
A Feedback Inclusive Neuromuscular Training Program Alters Frontal Plane Kinematics, Eric K. Greska, Nelson Cortes, Bonnie L. Van Lunen, James A. Oñate
A Feedback Inclusive Neuromuscular Training Program Alters Frontal Plane Kinematics, Eric K. Greska, Nelson Cortes, Bonnie L. Van Lunen, James A. Oñate
Rehabilitation Sciences Faculty Publications
-Anterior cruciate ligament (ACL) neuromuscular training programs have demonstrated beneficial effects in reducing ACL injuries, yet further evaluation of their effects on biomechanical measures across a sports team season is required to elucidate the specific factors that are modifiable. The purpose of this study was to evaluate the effects of a 10-week off-season neuromuscular training program on lower extremity kinematics. Twelve Division I female soccer players (age: 19.2 ± 0.8 years, height: 1.67 ± 0.1 m, weight: 60.2 ± 6.5 kg) performed unanticipated dynamic trials of a running stop-jump task pretraining and posttraining. Data collection was performed using an 8-camera …
The Effects Of A Semi-Rigid Ankle Brace On A Simulated Isolated Subtalar Joint Instability, Julie Choisne, Matthew C. Hoch, Sebastian Bawab, Ian Alexander, Stacie I. Ringleb
The Effects Of A Semi-Rigid Ankle Brace On A Simulated Isolated Subtalar Joint Instability, Julie Choisne, Matthew C. Hoch, Sebastian Bawab, Ian Alexander, Stacie I. Ringleb
Mechanical & Aerospace Engineering Faculty Publications
Subtalar joint instability is hypothesized to occur after injuries to the calcaneofibular ligament (CFL) in isolation or in combination with the cervical and the talocalcaneal interosseous ligaments. A common treatment for hindfoot instability is the application of an ankle brace. However, the ability of an ankle brace to promote subtalar joint stability is not well established. We assessed the kinematics of the subtalar joint, ankle, and hindfoot in the presence of isolated subtalar instability, investigated the effect of bracing in a CFL deficient foot and with a total rupture of the intrinsic ligaments, and evaluated how maximum inversion range of …