Background: The aim of this anatomical study was to evaluate the course of the extensor pollicis longus (EPL) tendon, its positional relationship to adjacent structures, and the resulting clinical relevance under consideration of various functional positions.
Materials And Methods: Twenty upper extremities from ten adult human cadavers embalmed using Thiel's method were included in this study. The greatest possible movement/slippage of the EPL tendon, the angle at which the tendon wraps around Lister's tubercle, and its course across the extensor carpi radialis longus and brevis (ECRL and ECRB) were recorded and defined in all functional positions.
Results: Our findings demonstrate a high range of motion of the tendon in relation to clinically relevant structures.
Conclusion: Understanding the anatomical course of the EPL tendon, its potential extent of movement, and its resulting positional changes is essential for the diagnosis and surgical treatment of patients with complaints or injuries in the dorsoradial wrist region.
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http://dx.doi.org/10.1007/s10354-024-01052-w | DOI Listing |
Revision total knee arthroplasty (rTKA) is an increasingly common challenge for arthroplasty surgeons. The survivorship of rTKA is significantly lower than that of primary total knee arthroplasty, resulting in an increasing incidence of repeat rTKA. These cases present multifactorial challenges including the skin and soft-tissue envelopes, bone loss, ligamentous compromise, and often a history of periprosthetic joint infection.
View Article and Find Full Text PDFExtensor tendon injuries are commonly encountered after trauma. These injuries often result in acute weakness and have widely differing treatment options depending on the severity and the location of the injury within the upper extremity. Zone I injuries can often be treated nonoperatively with the potential for pinning of any large bony avulsion fragments.
View Article and Find Full Text PDFTendinopathies around the hand and wrist are common. Most are diagnosed easily with a thorough history and clinical examination. Common conditions involving the hand and wrist include trigger finger, de Quervain tenosynovitis, intersection syndrome, third and fourth extensor compartment tenosynovitis, extensor carpi ulnaris tendinitis, and flexor carpi radialis tendinitis.
View Article and Find Full Text PDFWorld Neurosurg
December 2024
Department of Orthopedics, Huashan Hospital, Fudan University, Shanghai, 200040, China; Spine Center Fudan University, Shanghai, 200040, China. Electronic address:
Background: To measure the muscle strength around the cervical spine; clarify the relationships among muscles, cervical sagittal alignment, and cervical spondylotic myelopathy(CSM); and understand the process underlying loss of cervical lordosis.
Methods: Sex, age, course of illness, and radiological data were obtained for patients with CSM and a control group of healthy individuals. C2-7 Cobb angles were measured in cervical radiographs, and the vertebral body areas(VBAs) and cross-sectional areas(CSAs) of the deep flexors, superficial flexors(SF), deep extensors, and superficial extensors(SE) were measured from the C3/4 to C6/7 intervertebral levels in T2-weighted axial magnetic resonance images.
Curr Biol
December 2024
School of Natural Sciences, University of Manchester, Michael Smith Building, Oxford Road, Manchester M13 9PT, UK.
The evolution of bipedal gait is a key adaptive feature in hominids, but the running abilities of early hominins have not been extensively studied. Here, we present physics simulations of Australopithecus afarensis that demonstrate this genus was mechanically capable of bipedal running but with absolute and relative (size-normalized) maximum speeds considerably inferior to modern humans. Simulations predicted running energetics for Australopithecus that are generally consistent with values for mammals and birds of similar body size, therefore suggesting relatively low cost of transport across a limited speed range.
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