Global trends in research on cervicogenic headache: a bibliometric analysis

BackgroundThere has been a marked increase in cervicogenic headaches in recent years, significantly affecting sufferers’ daily lives and work. While several treatments exist for this type of headache, their long-term effects could be improved, and additional data from large clinical samples are needed. This study aims to systematically examine the current state of research in cervicogenic headaches through a bibliometric analysis, identify areas of current interest, and provide insight into potential future research directions.MethodsThis article examines research trends in the field of cervicogenic headache through a bibliometric analysis of scholarly articles in the field of cervicogenic headache over the past four decades. The bibliometric analysis method employed included searching the Web of Science database using topics related to cervicogenic headaches. Inclusion criteria were limited to articles and review papers on cervicogenic headaches published between 1982 and 2022. The retrieved dataset was then analyzed using R software and VOSviewer to identify the major research areas, countries and institutions, the most influential authors, journals and keywords, co-citations in the literature, and co-authorship networks.ResultsThis study analyzed 866 articles published between 1982 and 2022, involving 2,688 authors and generating 1,499 unique author keywords. Neuroscience and neurology were the primary focus, with participation from 47 countries, primarily led by the United States, which has the most published articles (n = 207), connections (n = 29), and citations (n = 5,238). In the cervicogenic headache study, which involved 602 institutions, the University of Queensland received the most significant number of citations (n = 876), and Cephalalgia was the journal with the most published articles and received the most local citations (n = 82) and highest growth (n = 36). Two hundred sixty-nine journals have published articles on cervicogenic headaches. Among researchers studying cervicogenic headache, Sjaastad O had the most published articles (n = 51) and citations (n = 22). The most commonly occurring keyword was “cervicogenic headache.” Except for the fourth most impactful paper, as determined by the Local Citation Score, which analyzed clinical treatments, all the top documents emphasized investigating the diagnostic mechanisms of cervicogenic headache. The most commonly occurring keyword was “cervicogenic headache.”ConclusionThis study used bibliometric analysis to provide a comprehensive overview of the current research on cervicogenic headaches. The findings highlight several areas of research interest, including the need for further investigation into the diagnosis and treatment of cervicogenic headaches, the impact of lifestyle factors on cervicogenic headaches, and the development of new interventions to improve patient outcomes. By identifying these gaps in the literature, this study provides a foundation for guiding future research to improve the diagnosis and treatment of cervicogenic headaches

Recrystallization Texture Analysis of FeCoNiCrMnAl_0.5 High-Entropy Alloy Investigated by High-Energy X-ray Diffraction

In small volume fractions, the bcc phase plays an important role in the properties of FeCoNiCrMnAl0.5 multiple-phase high-entropy alloys (HEAs). Since the small volume fraction of the bcc phase limits the detection of its texture, its texture evolution during mechanical processing is still unclear. In the current research, high-energy X-ray diffraction was used to investigate the crystallographic textures of cold-rolled and annealed FeCoNiCrMnAl0.5 dual-phase HEA with fcc and bcc phases. During cold-rolling deformation, multi-pass symmetry under isothermal conditions leads to asymmetric {200}bcc and {211}bcc peaks; the asymmetry disappears after annealing treatment, with the evolution of prominent texture components and the release of internal residual stress. The Goss texture component and {112} and {111} texture components were intensified after cold-rolling in the fcc and bcc phases, respectively, with orientation relationships of {110}bccbcc//{111}fccfcc recognized in the cold-rolled HEA. Based on this relationship, the yield strength (YS) and engineering ultimate tensile strength (UTS) of the sample reached 570 MPa and 920 MPa, respectively, which shows a fracture elongation of 27%. The study provides deeper insight into the anisotropic mechanical characteristics of the investigated HEA and demonstrates the great potential of dual-phase HEAs for mechanical applications in industry

Micromechanical behaviors related to confined deformation in pure titanium

Confined deformation, e.g. mechanical twinning, shear banding, and Lüders banding, etc. was extensively observed in metals and alloys with low stacking-fault energies, especially under complex loadings, governing the mechanical properties. It is often accompanied with gradient microstructures to accommodate the stress concentrations. Understanding the micromechanical behaviors of structural materials having confined deformation is important for evaluating the structural stabilities of engineering components. Synchrotron-based techniques provide powerful tools for multiscale microstructural characterization owing to their good resolution in real/reciprocal space, fast data collection/processing and flexible application scenarios. In this paper, the synchrotron-based high-energy X-ray diffraction (HE-XRD) and microdiffraction (μXRD) techniques in combination with traditional characterization methods are used to reveal the deformational gradient structures/stresses under different loading modes in multiscale. The structure/stress gradients induced by laser shot peening treatment and the deformation twins generated during uniaxial tensile loading in pure titanium were systematically studied by HE-XRD and μXRD, in order to elucidate the accommodating role of the deformational structures subjected to various confined scenarios. The new finding regarding the micromechanical behaviors related to confined deformation contributes to the in-depth understanding of related complex deformation behaviors