Minimally invasive (MI) lumbar decompression became a common approach to treat lumbar stenosis. This approach may potentially mitigate postoperative increases in segmental motion. The goal of this study was to evaluate modifications to segmental motion in the lumbar spine following a MI unilateral approach as compared to traditional facet-sparing and non-facet sparing decompressions. Six human ...

In elastography we are capable of estimating the two in-plane principal strain components following an applied compression, namely the axial and lateral components, along and perpendicular the compressor/transducer axis, re pectively. However, the motion resulting from the compression is threedimensional. Therefore, in order to fully describe the resulting three-dimensional motion we need to al...

Optical coherence tomography (OCT) and optical coherence microscopy (OCM) allow the acquisition of quantitative three-dimensional axial flow by estimating the Doppler shift caused by moving scatterers. Measuring the velocity of red blood cells is currently the principal application of these methods. In many biological tissues, blood flow is often perpendicular to the optical axis, creating the ...

OBJECTIVE To determine kinematic movements of the vertebral column of horses during normal locomotion. ANIMALS 5 Dutch Warmblood horses without apparent lameness or problems associated with the vertebral column. PROCEDURE Kinematics of 8 vertebrae (T6, T10, T13, T17, L1, L3, L5, and S3) and both tuber coxae were determined, using bone-fixated markers. Horses were recorded while walking on a...

SUMMARY OF BACKGROUND DATA Previous work has demonstrated the efficacy of lumbar pedicle screw hook rod (PSHR) techniques and the Buck screw in the stabilization of spondylolysis. The mechanical behavior of lower profile cervical implants used to create PSHR, hybrid cable plate constructs, and titanium miniplating has not previously been described. METHODS Calf lumbar spines (L2-L6) were util...

STUDY DESIGN A biomechanical and anatomic study with human cadaveric lumbar spine. OBJECTIVES The purpose of this study is to examine the morphologic changes in the intervertebral foramen during flexion, extension, lateral bending, and axial rotation of the lumbar spine and to correlate these changes with the flexibility of the spinal motion segments. SUMMARY OF BACKGROUND DATA Previous stu...

Therapsids covered the entire spectrum of terrestrial locomotion from sprawling to parasagittal. Switching between and more erect may have been possible in earlier taxa. First, axial skeleton shows little regionalization allows lateral undulation, evolving then increasingly towards enabling dorsoventral swinging. During locomotion, every step invokes a ground reaction force functional loadings ...

Conventional pipeline failure pressure assessment codes do not allow for prediction of interacting defects subjected to combined loadings. Alternatively, numerical approaches may be used; however, they are computationally expensive. In this work, an analytical equation based on finite element analysis the API 5L X52, X65, and X80 corroded pipes with a longitudinal corrosion defect loadings is p...

In this paper, transverse vibration analysis of rotating micro-beam is investigated based on the modified couple stress theory. The simply-supported modeled utilizing Euler-Bernoulli and Timoshenko beam theories. system around a fixed axis perpendicular to axial direction beam. For first time, displacement filed introduced as coupled field translational field. other words, mentioned rotational ...