Okajimas Folia Anatomica Japonica

Functional Architecture of the Human Superior Mesenteric Vein

JOSE RICARDO BARROS PERNAMBUCO, CLAUDIO A. FERRAZ de CARVALHO, ROMEU R ...

1983 Volume 59 Issue 6 Pages 351-361
Published: 1983
Released on J-STAGE: September 24, 2012

DOIhttps://doi.org/10.2535/ofaj1936.59.6_351

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The muscular, collagen and elastic fiber dispositions of the superior mesenteric vein wall were studied in 40 antaomic specimens by various mesoscopic and microscopic techniques. The muscular fibers follow a crossed spiral pattern. Close to the superior mesenteric vein junction with the portal vein, these spirals are elongated and they become progressively flattened towards the ileocecal region where they tend to a circular disposition. At the tributary vein entrance, circular bundles of the intima layer of the superior mesenteric vein bend towards its ostium thus forming annular thickenings. The collagen fibers form pantographic networks in the superior mesenteric vein wall, crossing each other at different angles in the three layers of the vessel. The elastic fibers follow the same disposition as the muscular fibers. Morphofunctional considerations are discussed.

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Displaced Amacrine Cells in the Chick Retina: Developmental and Experimental Observations

YOSHIHIRO SUGIHARA

1983 Volume 59 Issue 6 Pages 363-385
Published: 1983
Released on J-STAGE: September 24, 2012

DOIhttps://doi.org/10.2535/ofaj1936.59.6_363

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Displaced amacrine cells in the chick retina were observed development. ally by Golgi methods under a light microscope and by elecron microscopy. Cells which were determined developmentally by electron microscopy were identified by section experiments of the optic nerve.
The displaced amacrine cells developed slightly late compared to the ganglion cells. The cells lined the cell bodies in an inner plexiform layer at stages 34 and 35 (about 8 days of incubation). The cell bodies became admixed with ganglion cells at stage 39 (about 13 days of incubation). The Golgi image of the developed displaced amacrine cells resembled one shape of amacrine cells if it was inverted. The special fine features of the cells included the distribution of chromatin granules, with slightly dense attachment to the nuclear envelope. The cytoplasm was rich in volume towards the sclera. Most of the cell organelles except the free ribosomes were distributed in the region eccentrically. These cells remained intact at 10 days postoperatively. Gradually, the cells became influenced secondarily and showed slight morphological changes in the cell organelles. However, the cells never disappeared as demonstrated in ganglion cells at 3 months postoperatively.

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An Autopsy Case of Double Inferior Vena Cava Accompanied by Atypical Lateral Branches of the Abdominal Aorta

with Special Consideration to the Embryology

KOJI KAMI, TAKASHI MORISHITA

1983 Volume 59 Issue 6 Pages 387-403
Published: 1983
Released on J-STAGE: September 24, 2012

DOIhttps://doi.org/10.2535/ofaj1936.59.6_387

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double inferior vena cava with an atypical mode of lateral branching of the abdominal aorta was observed in the cadaver of a 43-year-old Japanese male (No.781).
The left inferior vena cava was formed by the union of the left common iliac vein and an interiliac anastomosis which is derived from the interpostcardinal veins to the right inferior vena cava. The atypical vein ran upward for a distance of 123mm and communicated with the right inferior vena cava at a level anterior to the body of the first lumbar vertebra. There was another anastomosis between the right and left inferior vena cava which derived from the intersupracardinal vein.
The present case of double inferior vena cava belongs to type BC of McClure and Butler (1925) and is to be classified as type II-b-4 of Takemoto et al. (1978), and become the 72nd case in Japan since 1901.
Bilateral accessory renal arteries arose from the right side of the aorta and the left testicular artery, and pierced the lower part of the individual kidney. One right lateral splanchnic branch coming from the aorta diverged at the level of the upper border of the first lumbar vertebra, and had a common stem with the middle suprarenal, the pair of inferior suprarenal, the main renal and the testicular arteries. In the left side of the aorta, the mode of lateral splanchnic branching showed an usual manner with the exception that the accessory renal artery arose from the left testicular artery.

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