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Full-Text Articles in Life Sciences

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 Jan 2013

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 …


Mechanical And Functional Assessment Of The Wrist Affected By Rheumatoid Arthritis: A Finite Element Analysis, Bajuri Mn, Kadir Mr, Murali Mr, Kamarul T Jan 2012

Mechanical And Functional Assessment Of The Wrist Affected By Rheumatoid Arthritis: A Finite Element Analysis, Bajuri Mn, Kadir Mr, Murali Mr, Kamarul T

Murali Malliga Raman

Understanding the pathomechanics involved in rheumatoid arthritis (RA) of the wrist provides valuable information, which will invariably allow various therapeutic possibilities to be explored. The computational modelling of this disease permits the appropriate simulation to be conducted seamlessly. A study that underpins the fundamental concept that produces the biomechanical changes in a rheumatoid wrist was thus conducted through the use of finite element method. The RA model was constructed from computed tomography datasets, taking into account three major characteristics: synovial proliferation, cartilage destruction and ligamentous laxity. As control, a healthy wrist joint model was developed in parallel and compared. Cartilage …


Strength And Hypertrophy Responses To Constant And Decreasing Rest Intervals In Trained Men Using Creatine Supplementation, Tacito P. Souza-Junior, Jeffrey M. Willardson, Richard Bloomer, Richard D. Leite, Steven J. Fleck, Paulo R. Oliveira, Robert Simao Jan 2011

Strength And Hypertrophy Responses To Constant And Decreasing Rest Intervals In Trained Men Using Creatine Supplementation, Tacito P. Souza-Junior, Jeffrey M. Willardson, Richard Bloomer, Richard D. Leite, Steven J. Fleck, Paulo R. Oliveira, Robert Simao

Jeffrey Willardson

The purpose of the current study was to compare strength and hypertrophy responses to resistance training programs that instituted constant rest intervals (CI) and decreasing rest intervals (DI) between sets over the course of eight weeks by trained men who supplemented with creatine monohydrate (CR).


Effect Of Surface Stability On Core Muscle Activity For Dynamic Resistance Exercises, Jeffrey Willardson, Fabio E. Fontana, Eadric Bressel Jan 2009

Effect Of Surface Stability On Core Muscle Activity For Dynamic Resistance Exercises, Jeffrey Willardson, Fabio E. Fontana, Eadric Bressel

Jeffrey Willardson

To compare core muscle activity during resistance exercises performed on stable ground vs. the BOSU Balance Trainer. Methods: Twelve trained men performed the back squat, dead lift, overhead press, and curl lifts. The activity of the rectus abdominis, external oblique abdominis, transversus abdominis/internal oblique abdominis, and erector spinae muscles was assessed. Subjects performed each lift under three separate conditions including standing on stable ground with 50% of a 1-RM, standing on a BOSU Balance Trainer with 50% of a 1-RM, and standing on stable ground with 75% of a 1-RM. Results: Significant differences were noted between the stable 75% of …