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RISPeak Stress in the Annulus Fibrosus Under Cyclic Biaxial Tensile Loading
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Numerous in vitro studies have examined the initiation and propagation of fatigue injury pathways in the annulus fibrosus (AF) using isolated motion segments; however, the cyclevarying changes to the AF under cyclic biaxial ...
Model-Aided Design of a Rear-Impact Collision Testing System for In Vivo Investigations
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A collision testing device used to simulate rear-end impacts on human volunteers was developed and validated. The testing device was designed using impact parameters obtained from real crash-test-derived vehicle-to-vehicle ...
Reaction Forces and Flexion–Extension Moments Imposed on Functional Spinal Units With Constrained and Unconstrained In Vitro Testing Systems
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A mechanical goal of in vitro testing systems is to minimize differences between applied and actual forces and moments experienced by spinal units. This study quantified the joint reaction forces and reaction flexion–extension ...
Characterizing the Mechanical and Viscoelastic Response of the Porcine Facet Joint Capsule Ligament in Response to a Simulated Impact
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The facet capsule ligament (FCL) is a structure in the lumbar spine that constrains motions of the vertebrae. Subfailure loads can produce microdamage resulting in increased laxity, decreased stiffness, and altered ...
Strain Response in the Facet Joint Capsule During Physiological Joint Rotation and Translation Following a Simulated Impact Exposure: An In Vitro Porcine Model
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Low back pain (LBP) is frequently reported following rear impact collisions. Knowledge of how the facet joint capsule (FJC) mechanically behaves before and after rear impact collisions may help explain LBP development ...
Exploring the Influence of Facet Orientation and Tropism on Neutral Zone Properties
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Lumbar spine pathologies have been linked independently to both neutral zone (NZ) properties and facet joint anatomical characteristics; however, the effect of facet joint orientation (FO) and tropism (FT) on NZ properties ...
The Impact of Posture on the Mechanical Properties of a Functional Spinal Unit During Cyclic Compressive Loading
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: To assess how posture affects the transmission of mechanical energy up the spinal column during vibration, 18 porcine functional spinal units (FSUs) were exposed to a sinusoidal force (1500 آ±â€‰1200 N) at 5 Hz for ...
The Effect of Local Hydration Environment on the Mechanical Properties and Unloaded Temporal Changes of Isolated Porcine Annular Samples
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Preventing dehydration during in vitro testing of isolated layers of annulus fibrosus tissue may require different test conditions than functional spine units. The purpose of the study was twofold: (A) to quantify changes ...
Acute Surgical Injury Alters the Tensile Properties of Thoracolumbar Fascia in a Porcine Model
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Recent work utilizing ultrasound imaging demonstrated that individuals with low back pain (LBP) have increased thickness and decreased mobility of the thoracolumbar fascia (TLF), an indication that the TLF may play a role ...