1,721,009 research outputs found
Imaging of acute scrotum
No full textGrayscale and Doppler modes are the imaging modalities of choice for the evaluation of patients presenting with acute scrotal pain. The informa- tion provided is vital to discriminate between situations that require immediate surgery, from those that are managed conservatively. It is therefore crucial to perform the study rapidly enough to avoid delay in surgery, when needed. Also, high-end equipment provided with sensitive Doppler modes is essential. The operator must be familiar with clinical presentation of the different scrotal pathologies and trained enough in optimizing Doppler parameters to obtain high-qual- ity imagin
Mechanisms of pain
No full textThe chapter describes in summary the main mechanism of pain based on peripheral receptors and biochemical mediators. The pathways of pain and the central nervous system centers for pain are described. Different and the current hypothesis of pain modulation, sensitization, and manipulation are described. The concept of pain matrix based on the modern functional neuromaging in humans is reported. The descending control of brainstem on spinal mechanisms and the importance of attention and cognitive state on pain perception and elaboration are described
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
- …
