The Experts below are selected from a list of 348 Experts worldwide ranked by ideXlab platform
Rehman Irving - One of the best experts on this subject based on the ideXlab platform.
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Illustration of bones of right hemipelvis, sacrum and coccyx, posterior view
Norris Medical Library; University of Southern California. Norris Medical Library, 2011Co-Authors: Rehman IrvingAbstract:Includes labels: Superior articular process, Median sacral crst, Post. sacral foramina, Sacrum, Sacral hiatus, Coccyx, Post. superior iliac spine, Iliac crest, Iliac fossa, Post. inferior iliac spine, Greater Sciatic Notch, Ischial spine, Lesser Sciatic notc
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Illustration of left hip joint, anterior view, showing bones and ligament
Norris Medical Library; University of Southern California. Norris Medical Library, 2010Co-Authors: Rehman Irving, Barker HelenAbstract:Includes labels: Pubic tubercle, Obturator foramen, Body of pubis, Ischial spine, Ischial tuberosity, Lesser trochanter, Femur, Greater Sciatic Notch, Ant. superior iliac spine, Ant. inferior iliac spine, Acetabular ligament, Femoral head, Greater trochanter, Femoral nec
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Natural color photograph of dissection of the right gluteal region, posterior view, with much of the dorsal musculature dissected away to expose the hip capsule; the piriformis has been cut and reflected to expose the Greater Sciatic foramen
Norris Medical Library; University of Southern California. Norris Medical Library, 2010Co-Authors: Rehman IrvingAbstract:Includes labels: Capsule of hip, Obturator externus m., Lesser trochanter, Linea aspera, Femur, Iliotibial tract, Piriformis m., Greater Sciatic Notch, Quadratus femoris m.-cut and retracted, Gluteus maximus m.-retracte
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Natural color photograph of dissection of the left hip capsule, the gluteus maximus muscle retracted
Norris Medical Library; University of Southern California. Norris Medical Library, 2010Co-Authors: Rehman IrvingAbstract:Includes labels: Capsule of hip, Short lateral rotator-tendons, Greater Sciatic Notch, Gluteus maximus-retracte
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Illustration of bones of right hemipelvis, sacrum and coccyx, posterior view
Norris Medical Library; University of Southern California. Norris Medical Library, 2010Co-Authors: Rehman IrvingAbstract:Includes labels: Sacrum, Coccyx, Post. superior iliac spine, Articular surface, Articular surface, Greater Sciatic Notch, Acetabulum, Ischial spin
Jaroslav Bruzek - One of the best experts on this subject based on the ideXlab platform.
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comparison of methods to determine sex by evaluating the Greater Sciatic Notch visual angular and geometric morphometrics
Forensic Science International, 2012Co-Authors: Jorge Gomezvaldes, Mirsha Quintosanchez, Antinea Menendez Garmendia, Jana Veleminska, Gabriela Sanchezmejorada, Jaroslav BruzekAbstract:Sex estimation is the first step for biological profile reconstruction of an unknown skeleton (archaeological or contemporary) and consequently for positive identification of skeletal remains recovered from forensic settings. Several tools have been developed using different osseous structures. With the intention to provide an objective method comparison, we reported the analysis of three different methods (visual, metric and geometric morphometrics) for sex assessment of the Greater Sciatic Notch. One hundred and thirty pelvic bones (45.4% females and 54.6% males) from the National Autonomous University of Mexico Skeletal Collection pertaining to the contemporary Mexican population were analyzed. We used the ROC-analysis to test between desired false positive thresholds (1-specificity) and expected true positive rates (sensitivity) in order to predict the best approach to sex assessment. The comparison of the area under the ROC-curves shows significant differences among visual and metric methods. At the same time, the analysis suggested that higher morphological variation among the sexes is independent of the methodological approach. The results indicate that the metric (angle), with a high percent of indeterminate cases (34.6%), and visual, with 26.2% of the cases allocated as intermediate cases, were poorly accurate; we cannot recommend these techniques for sexing an unknown specimen. On the other hand, the geometric morphometrics approach improves sex estimation in 82.3% of correctly classified individuals with more than 95% of posterior probability. In addition to the method comparison, the major sexual variation of the Greater Sciatic Notch was determined to be located on its posterior border.
Barker Helen - One of the best experts on this subject based on the ideXlab platform.
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Illustration of left hip joint, anterior view, showing bones and ligament
Norris Medical Library; University of Southern California. Norris Medical Library, 2010Co-Authors: Rehman Irving, Barker HelenAbstract:Includes labels: Pubic tubercle, Obturator foramen, Body of pubis, Ischial spine, Ischial tuberosity, Lesser trochanter, Femur, Greater Sciatic Notch, Ant. superior iliac spine, Ant. inferior iliac spine, Acetabular ligament, Femoral head, Greater trochanter, Femoral nec
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Illustration of left hip joint, anterior view, showing bones and ligament
Norris Medical Library; University of Southern California. Norris Medical Library, 2010Co-Authors: Rehman Irving, Barker HelenAbstract:Includes labels: Greater Sciatic Notch, Ischial spine, Lesser Sciatic Notch, Ischiofemoral ligament, Ilium, Ant. superior iliac spine, Ant. inferior iliac spine, Iliofemoral ligament, Greater trochanter, Femoral nec
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Illustration of dissection of the right hip and sacrum, posterior view, indicating the overlying structures
Norris Medical Library; University of Southern California. Norris Medical Library, 2010Co-Authors: Rehman Irving, Barker HelenAbstract:Includes labels: Sacrum, Greater Sciatic Notch, Ischial spine, Lesser Sciatic Notch, Gluteus maximus m., Ischial tuberosity, Iliac crest, Gluteus medius aponeurosis, Ant. superior iliac spine, Ant. inferior iliac spine, Iliotibial trac
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Illustration of bones of right hemiplevis and hip, posterior view
Norris Medical Library; University of Southern California. Norris Medical Library, 2010Co-Authors: Rehman Irving, Barker HelenAbstract:Includes labels: Posterior superior iliac spine, Posterior inferior iliac spine, Greater Sciatic Notch, Ischial spine, Lesser Sciatic Notch, Ischial tuberosity, Lesser trochanter, Iliac fossa, Iliac tubercle, Iliac crest, Anterior superior iliac spine, Anterior inferior iliac spine, Acetabulum, Head of femur, Greater trochanter, Neck, Femu
Jaroslav Brůžek - One of the best experts on this subject based on the ideXlab platform.
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technical note geometric morphometrics and sexual dimorphism of the Greater Sciatic Notch in adults from two skeletal collections the accuracy and reliability of sex classification
American Journal of Physical Anthropology, 2013Co-Authors: Jana Veleminska, Jorge Gomezvaldes, Gabriela Sanchezmejorada, Vaclav Krajicek, Jan Dupej, Petr Veleminský, Alena Sefcakova, Josef Pelikan, Jaroslav BrůžekAbstract:A3P-PACEA, UMR 5199 CNRS, University Bordeaux I, Talence 33405, FranceKEY WORDS shape analysis; hip bone; sex assessment; curve segmentation; SVM learn-ing modelABSTRACT The Greater Sciatic Notch (GSN) is one ofthe most important and frequently used characteristics fordetermining the sex of skeletons, but objective assessmentof this characteristic is not without its difficulties. We testedthe robustness of GSN sex classification on the basis of geo-metric morphometrics (GM) and support vector machines(SVM), using two different population samples. Using pho-tographs, the shape of the GSN in 229 samples from twoassemblages (documented collections of a Euroamericanpopulation from the Maxwell Museum, University of NewMexico, and a Hispanic population from Universidad Nacio-nal Autonoma de Mexico, Mexico City) was segmentedautomatically and evaluated using six curve representa-tions. The optimal dimensionality for each representationwas determined by finding the best sex classification. Theclassification accuracy of the six curve representations inour study was similar but the highest and concurrentlyhomologous cross-validated accuracy of 92% was achievedfor a pooled sample using Fourier coefficient and Legendrepolynomial methods. The success rate of our classificationwas influenced by the number of semilandmarks or coeffi-cients and was only slightly affected by GSN marginalpoint positions. The intrapopulation variability of thefemale GSN shape was significantly lower compared withthe male variability, possibly as a consequence of theintense selection pressure associated with reproduction.Males were misclassified more often than females. Ourresults show that by using a suitable GSN curve represen-tation, a GM approach, and SVM analysis, it is possible toobtain a robust separation between the sexes that is stablefor a multipopulation sample. Am J Phys Anthropol152:558–565, 2013.
Garry S. Gruen - One of the best experts on this subject based on the ideXlab platform.
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Case Report
Clinical Orthopaedics and Related Research, 2008Co-Authors: Philipp Kobbe, Boris A. Zelle, Garry S. GruenAbstract:Piriformis syndrome is an uncommon condition characterized by Sciatic nerve entrapment at the Greater Sciatic Notch. Nonoperative treatment such as physical therapy, nonsteroidal antiinflammatory drugs, and local injections often results in relief of symptoms. For patients who do not benefit from nonoperative therapy, surgical exploration and decompression of the Sciatic nerve has been effective. However, the success of surgery may be diminished by scar formation or hematoma in the anatomically restricted Sciatic Notch. We report two patients with piriformis syndrome who responded primarily to surgical decompression and had recurrent symptoms resulting from scar tissue formation in the Sciatic Notch. On revision surgery, polytetrafluoroethylene pledgets were placed around the Sciatic nerve to avoid compression and entrapment by scar tissue. Both patients had satisfactory outcomes at 3 years followup.
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Case Report: Recurrent Piriformis Syndrome After Surgical Release
Clinical Orthopaedics and Related Research, 2008Co-Authors: Philipp Kobbe, Boris A. Zelle, Garry S. GruenAbstract:Piriformis syndrome is an uncommon condition characterized by Sciatic nerve entrapment at the Greater Sciatic Notch. Nonoperative treatment such as physical therapy, nonsteroidal antiinflammatory drugs, and local injections often results in relief of symptoms. For patients who do not benefit from nonoperative therapy, surgical exploration and decompression of the Sciatic nerve has been effective. However, the success of surgery may be diminished by scar formation or hematoma in the anatomically restricted Sciatic Notch. We report two patients with piriformis syndrome who responded primarily to surgical decompression and had recurrent symptoms resulting from scar tissue formation in the Sciatic Notch. On revision surgery, polytetrafluoroethylene pledgets were placed around the Sciatic nerve to avoid compression and entrapment by scar tissue. Both patients had satisfactory outcomes at 3 years followup.
