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Morphology of Acetabulum and Femoral Head-Neck Junction in Hip Dysplasia Which Underwent Rotational Acetabular Osteotomy

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Open Journal of Orthopedics 2015年第5期5卷 126-134页

作者： Ryo Kanto Hiroshi Nakayama Shoji Nishio Yuki Fujihara Yu Takeda Shigeo Fukunishi Shinichi Yoshiya toshiya tachibana Department of Orthopaedic Surgery Hyogo College of Medicine Nishinomiya Japan

The purpose of this study was to evaluate the preoperative radiographs with cases of developmental dysplasia of the hip (DDH) leading to rotational acetabular osteotomy (RAO) or curved peri-ace-tabular osteotomy (CPO), and examine the frequency of femoroacetabular impingement (FAI) related bone morphology in the acetabulum and femoral head-neck junction. Twenty-four hips with hip dyaplasia who underwent CPO or RAO were included in this study. Six hips had grade 0 and eighteen hips had grade 1 OA according to the Tönnis classification. We excluded patients with moderate and severe hip osteoarthritis and major femoral head deformities. Preoperative radiograph was evaluated on sharp angle, center-edge angle, alpha angle, crossover sign and posterior wall sign. Crossover signs were revealed in 7 hips (29.2%);posterior wall signs were revealed in 16 hips (66.7%);and cam-type deformities with an alpha angle of ≥50.5°were observed in 19 hips (79.2%) in preoperative evaluation. As determined using the Tönnis scale, no progression of osteoarthritis was found in 16 of the 24 hips;there was a one-grade progression in 8 hips. Among the 8 hips, either positive cross-over sign or posterior sign in acetabulum, and an alpha angle of ≥50.5°in femur were observed in six hips with progression of osteoarthritis. The presence of cam-type deformity and acetabular retroversion in patients who underwent RAO or CPO was relatively high in preoperative radiographs, and caution should be employed during surgery in patients with DDH. There is a possibility of secondary FAI due to excessive forward coverage of the bone fragments after RAO and CPO.

关键词： Acetabular Hip Dysplasia Acetabular Osteotomy Femoroacetabular Impingement

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The Role of Occipitotemporal Network for Speed-Reading:An fMRI Study

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Neuroscience Bulletin 2024年第9期40卷 1261-1273页

作者： Dexin Sun Zhilin Zhang Naoya Oishi Qi Dai Dinh Ha Duy Thuy Nobuhito Abe Jun tachibana Shintaro Funahashi Jinglong Wu toshiya Murai Hidenao Fukuyama Research Center for Medical Artificial Intelligence Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen518055China University of Chinese Academy of Sciences Beijing100049China Department of Psychiatry Graduate School of MedicineKyoto UniversityKyoto606-8501Japan Medial Innovation Center Graduate School of MedicineKyoto UniversityKyoto606-8501Japan Human Brain Research Center Graduate School of MedicineKyoto UniversityKyoto606-8501Japan Kokoro Research Center Kyoto UniversityKyoto606-8501Japan Speed Reading Academy Kyoto600-8439Japan

The activity of occipitotemporal regions involved in linguistic reading processes,such as the ventral occipitotemporal cortex(vOT),is believed to exhibit strong interactions during higher-order language processing,specifically in the connectivity between the occipital gyrus and the temporal *** this study,we utilized functional magnetic resonance imaging(fMRI)with psychophysiological interaction(PPI)and dynamic causal modeling(DCM)to investigate the functional and effective connectivity in the occipitotemporal network during speed *** conducted the experiment with native Japanese speakers who underwent and without speed-reading training and subsequently performed established reading tasks at different speeds(slow,medium,and fast)while undergoing 3-Tesla Siemens *** activation analyses revealed significant changes in occipital and temporal regions as reading speed increased,indicating functional connectivity within the occipitotemporal *** results further demonstrated more intricate effective connections and high involvement within the occipitotemporal pathway:(1)reading signals originated from the inferior occipital gyrus(iO),distributed to the vOT and the posterior superior temporal sulcus(pSTS),and then gathered in the anterior superior temporal sulcus(aSTS);(2)reading speed loads had modulation effects on the pathways from the aSTS to vOT and from the iO to *** findings highlight the complex connectivity and dynamic interactions within the occipitotemporal network during speed-reading processes.

关键词： Speed reading fMRI The occipitotemporal network Functional connectivity Effective connectivity

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