Results 181 to 190 of about 135,088 (218)

The Influence of Backrest Inclination and Lumbar Support on Lumbar Lordosis

Spine, 1979
The influence of backrest inclination and lumbar support on the shape of the lumbar spine in sitting positions has been studied radiographically on 38 healthy subjects. Four angles of backrest inclination and four different sizes of lumbar support were studied. In addition, the lumbar support was placed at three different lumbar levels.
G B, Andersson, R W, Murphy, R, Ortengren, A L, Nachemson   +3 more
openaire   +2 more sources

Biomechanics in lumbar lordosis

1974
For the purpose of analysis, lumbar lordosis, being a product of functional adaptation to dynamic stress, always should be compared with its opposite, i.e., the flattened lumbar lordosis which from the functional point of view must be regarded as the response to static stress.
J. Polster, U. Spieker, H. R. Hoefert, J. U. Krenz   +3 more
openaire   +1 more source

Lumbar Lordosis Measurement

Spine, 1998
A historic cross-sectional study of lumbar lordosis in 199 healthy individuals aged 1-30 years.To evaluate the magnitude and rate of the development of the normal lumbar lordotic curve with age using two methods of measurement.There is no agreement among spine physicians on the range of the normal lumbar lordotic curve. In certain conditions, such as a
K V, Chernukha, R H, Daffner, D H, Reigel   +2 more
openaire   +2 more sources

Measurement of Lumbar Lordosis

Spine, 1996
Sixty radiographs were measured on two separate occasions by three physicians using four different techniques to evaluate the reliability and reproducibility of the measurement of lumbar lordosis.To evaluate clinical methods of measuring lumbar lordosis, determining intraobserver and interobserver reliability.Several different methods are used to ...
D W, Polly, F X, Kilkelly, K A, McHale, L M, Asplund, M, Mulligan, A S, Chang   +5 more
openaire   +2 more sources

Severe Lumbar Lordosis After Dorsal Rhizotomy

Journal of Pediatric Orthopaedics, 1996
Two children with spastic quadriplegia who developed excessive lumbar lordosis after selective dorsal rhizotomy are described. The rhizotomy did not change the ambulatory status of either child (one nonambulator, one household ambulator). Preservation of unopposed hip flexion in the presence of multiple laminectomies may lead to the development of a ...
K, Crawford, L A, Karol, J A, Herring
openaire   +2 more sources

Effect of Lordosis on the Stress in the Lumbar Spine

Clinical Orthopaedics and Related Research, 1976
A simple mathematical model is used to explore the influence of lordosis on the stress in the human spine. It is shown that flatter spines would tend to fail by flexion while spines with more lordosis would tend to fail by torsion.
openaire   +2 more sources

The impact of total lumbar disc replacement on segmental and total lumbar lordosis

Clinical Biomechanics, 2005
One of the goals of total lumbar disc replacement is restoration of the physiological sagittal alignment. There is little evidence if this goal is reached in vivo and further affects the clinical outcome.In 29 patients segmental lordosis and total lumbar lordosis were measured on X-rays pre- and postoperatively.
Balkan Cakir, Wolfram Käfer
exaly   +3 more sources

Lumbar Lordosis in Female Collegiate Dancers and Gymnasts

Medical Problems of Performing Artists, 2014
OBJECTIVE: Postural deviations can predispose an individual to increased injury risk. Specifically, lumbar deviations are related to increased low back pain and injury. Dancers and gymnasts are anecdotally suggested to have exaggerated lumbar lordosis and subsequently may be at increased risk of lumbar pathologies.
Jatin P, Ambegaonkar, Amanda M, Caswell, Kristen L, Kenworthy, Nelson, Cortes, Shane V, Caswell   +4 more
openaire   +2 more sources

The Effect of Harrington Rod Contouring on Lumbar Lordosis

Spine, 1987
The effect of Harrington rod sagittal plane contouring, or lack of it, on total lumbar, segmental lumbar, and lumbosacral lordosis was studied retrospectively in a series of 36 patients operated on for idiopathic scoliosis. Regardless of contouring, there was a decrease in total lumbar lordosis and lordosis above L4, with an increase in lordosis below ...
M P, Casey, M A, Asher, R R, Jacobs, J M, Orrick   +3 more
openaire   +2 more sources

Effect of Changes in Lordosis on Mechanics of the Lumbar Spine-Lumbar Curvature in Lifting

Journal of Spinal Disorders, 1999
Using a realistic nonlinear three-dimensional finite element model, biomechanics of the entire lumbar spine L1-S1, risk of tissue injury, and required local lumbar muscle exertion in extended and flexed postures are investigated under moderate to relatively large compression loads as great as 2800 N as the lumbar lordosis is altered from the undeformed
A, Shirazi-Adl, M, Parnianpour
openaire   +3 more sources