In revision surgery of the hip, reconstruction of the acetabulum often constitutes the most complex procedure. There is frequently a considerable loss of bone substance, and correct repositioning of the rotation center of the femoral head is required. Based on surgical experience supported by clinical results the authors affirm that both of these objectives may be achieved when the OCTOPUS socket system is used. This implant, with anchoring to the iliac bone and the use of bone transplants, allows for the reconstruction of the original anatomy of the cotyle.
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Nat Commun
January 2025
Committee on Development, Regeneration and Stem Cell Biology, The University of Chicago, Chicago, IL, USA.
Prehensile arms are among the most remarkable features of the octopus, but little is known about the neural circuitry controlling arm movements. Here, we report on the cellular and molecular organization of the arm nervous system, focusing on its massive axial nerve cords (ANCs). We found that the ANC is segmented.
View Article and Find Full Text PDFMater Horiz
December 2024
Department of Mechanical Engineering, Stony Brook University, Stony Brook, NY 11794, USA.
Soft actuators hold great promise for applications in biomimetic robots, artificial muscles, and drug delivery systems due to their adaptability in diverse environments. A critical aspect of designing thermally responsive soft actuators is to achieve spatially programmable actuation under a global thermal stimulus. Different local actuation behaviors can be encoded in one actuator to enable complex morphing structures for different tasks.
View Article and Find Full Text PDFBiol Open
December 2024
Laboratorio de Neurofisiología Integrativa. Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Ciudad de México, C.P. 14370, México.
Cell Discov
November 2024
Shanghai Institute of Hematology, State Key Laboratory of Medical Genomics, National Research Center for Translational Medicine, Rui-Jin Hospital, School of Medicine and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China.
Proc Natl Acad Sci U S A
November 2024
Department of Biological Sciences, Walla Walla University, College Place, WA 99324.
For many animals, color change is a critical adaptive mechanism believed to carry a substantial energetic cost. Yet, no study to date has directly measured the energy expenditure associated with this process. We examined the metabolic cost of color change in octopuses by measuring oxygen consumption in samples of excised octopus skin during periods of chromatophore expansion and contraction and then modeled metabolic demand over the whole octopus as a function of octopus mass.
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