1,721,001 research outputs found
An unusual peritoneal fossa: anatomic report and clinical implications
No full textThe peritoneal fossae are usually related to rotation and adhesion of the
abdominal viscera to the posterior abdominal wall during fetal development,
and/or the presence of retroperitoneal vessels running just under the peritoneum
and raising serosal folds. These fossae, therefore, are regarded as congenital
and have been considered clinically and surgically as sites of internal abdominal
hernias. The authors describe a peritoneal fossa interposed between the fourth
portion of the duodenum and the abdominal aorta. Due to a scoliosis of the lumbar
column, the abdominal aorta had shifted to the left of the duodenum, stretching
two semilunar avascular peritoneal folds connecting the vessel with the ascending
duodenum. These two folds bounded above and below an entrance into a fossa lined
by the posterior parietal peritoneum and bordered by the fourth portion of the
duodenum on the right and the aorta on the left. This recess extended as far as
the anterior surface of the second and third lumbar vertebrae. On the basis of
the anatomic findings, the authors suggest that acquired fossae, because of their
size and topography, may play a part in the etiopathogenesis of internal
abdominal hernia
Columnar cells of the parietal layer of Bowman's capsule and their relationship with sexual cycle in normal female mice.
No full textThe tubule-like cells (TLC) are present also in the parietal layer of the Bowman's capsule of the renal corpuscles in normal female mice kidney. These cells are morphologically similar to the cells of the proximal convoluted tubule. Further, significant variations of the TLC were present according to the phase of the sexual cycle
Lateral costal artery: accessory thoracic vessel of clinical interest
No full textThe lateral costal artery (LCA), a supernumerary branch of the internal thoracic artery (ITA), occurs in several ethnic groups on one side of the thorax or on both, in 15-30% of cases. It has been considered responsible for the "steal-syndrome" of the coronary blood after coronary artery bypass grafting and it used occasionally for myocardial revascularization. To clarify its functional significance, an interpretation based on our findings and human and comparative anatomy and embryology has been attempted. We report on a case where a right LCA of about 2 mm in caliber, rising from the ITA 2.5 cm below the subclavian, coursed as far as the 4th intercostal space for a distance of 13 cm after the anterior axillary line. Anastomosing with the intercostal arteries, it can act as a blood derivative circuit of the thoracic wall. Embryologically, this artery, like the normal parietal arteries of the trunk, might form a longitudinal channel connecting the intersegmental arteries. In mammals having a thoracic cage transversely restricted (quadrupeds), the ITA is more lateral than in primates having a circular thorax, and gives off a ventral branch toward the sternum. It might be hypothesized that the sternal branch occurring in quadrupeds, undergoing adaptation to the thoracic shape of primates, may become the main trunk of the ITA, whereas the LCA may be the remnant of the ITA of quadrupeds. Because the LCA ran partly along the "milk line" of humans, it might be regarded as a supernumerary mammary artery. (C) 2004 Wiley-Liss, Inc
Renal oncocytoma: misleading diagnosis of benignancy by using angular interface sign at MR imaging
No full text
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
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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