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Volume 67 (1990 - 199･･･
- Issue 6 Pages 405-
- Issue 5 Pages 297-
- Issue 4 Pages 219-
- Issue 2-3 Pages 65-
- Issue 1 Pages 1-
Predecessor
Volume 67, Issue 4
Displaying 1-11 of 11 articles from this issue
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Harumichi SHINOHARA, Satoshi MORISAWA, Masahiro TOSHIMA, Shigeki MIZUK ...1990 Volume 67 Issue 4 Pages 219-221
Published: October 20, 1990
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSThe number and distribution of valves were examined in 26 great saphenous veins. The number of valves per vein ranged from 3 to 11 with an average of 6.7. The valves tended to be concentrated in two segments; one within 10cm from the sapheno-femoral junction, and the other between 35 cm and 45 cm from the sapheno-femoral junction. More than 55% of the valves were located in these two segments. This fact should be taken into account when obtaining vein segments in graft operations.View full abstractDownload PDF (986K) -
Masahiro TOSHIMA, Harumichi SHINOHARA, Shigeki MIZUKAMI1990 Volume 67 Issue 4 Pages 223-226
Published: October 20, 1990
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSThe relative position of the sapheno-femoral junction (SFJ) with respect to the origin of the arterial trunk from which the deep femoral artery arises was examined. Among 47 SFJ's,9 (19%) were located at a proximal level to the arterial trunk, another 9 (19%) were located at an equal level to the trunk, and the remaining 29 (62%) were located at a distal level to the trunk. “In situ” saphenous vein graft for occlusion of the femoral artery is best indicated when the SFJ is located proximal to the arterial trunk. Our results suggested that such cases are encountered in as few as 19% of patients.View full abstractDownload PDF (996K) -
Harumichi SHINOHARA, Satoshi MORISAWA, Shigeki MIZUKAMI1990 Volume 67 Issue 4 Pages 227-229
Published: October 20, 1990
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSMatching examinations between the level of axillary artery perforation into the brachial plexus and the level of vertebral artery passage through the foramen transversarium were performed on 42 sides in 21 cadavers. As a result, it became clear that the two levels vary independently of each other.View full abstractDownload PDF (1058K) -
Shigenori OKADA, Yoshikuni OHTA, Ken NISHIMURA, Jun-ichi MATSUSHITA, M ...1990 Volume 67 Issue 4 Pages 231-241
Published: October 20, 1990
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSThe ultrastructure of the ameloblasts in the rabbit major incisor was investigated previously by Okada (1983)and the amelogenetic process was classified into six zones/stages. The present paper deals with changes in the microvascular architecture and ultrastructure of the blood capillaries in proportion to the amelogenetic process in the upper major incisor of the rabbit utilizing the acryl plastic injection method. Three different vascular layers were observed in the periodontal spaces of the major incisor of the rabbit. The inner vascular network consisted of a capillary network supplying the enamel organ and its meshes have vigorously changed during the amelogenesis. The capillary network was observed to be in the shape of a ladder with a continuous wall in the proliferation zone, to appear as round meshes with a fenestrated wall in the differentiation zone, as polygonal meshes with abundant fenestrations in the secretion zone, as ovoid meshes with fenestrations in the early maturation zone, and finally as coarse and ovoid meshes with a continuous wall again in the late maturation and regression zones. In the intermediate layer, arterioles and venules were located close to the capillary network, and the arterioles were derived from the short and long branches of the anterior superior alveolar artery. In the outer layer, a sinusoid network was observed to be in contact with the alveolar wall and received blood from the capillary network as well as venous vessels in the alveolar bone. The ladder-shaped capillary network mentioned above was thought to represent an intermediate form towards the succeeding zone, in which the round meshes may be suitable for supplying the nutrient elements that are needed in the differentiation of the inner enamel epithelial cells. The polygonal and ovoid meshes may be favorable for the transport of various necessary metabolic materials that are involved in the enamel ground substance formation and calcium deposition within a very short period.View full abstractDownload PDF (3767K) -
Masatake IMAI, Taizo SHIBATA, Keiichi MORIGUCHI, Yoshihiko TAKADA1990 Volume 67 Issue 4 Pages 243-247
Published: October 20, 1990
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSwe examined fluid-paths in the maxilla and mandible of the dog, and compared them with Kihara's extravascular fluid-path-system. Areolar tissue is formed in the walls of the Volkmann's and Haversian canals. This tissue is composed of collagenous and reticular fibers. Kihara confirmed the collagenous fibers were encircled, however we could not ascertain whether they were encircled or not. We have compared the paths in the walls of the Volkmann's and Haversian canals with Kihara's fluid paths, and found the paths in the bone do not belong to the category of Kihara's paths. Namely, the term “extravascular fluid path” should not be applied to the areolar tissue in the bone. We suggest the term “fluid path” for this tissue in the bone. The areolar tissue in the walls of the Volkmann's and Haversian canals and endosteum communicate with one another. We call them collectively endosteum. Yoshikawa called the areolar tissue in the Volkmann's and Haversian cansls perivasculare lymsphraume. However, this designation is inadequate considering the actual characteristics of this tissue.View full abstractDownload PDF (1405K) -
Taizo SHIBATA, Masatake IMAI, Keiichi MORIGUCHI, Yoshihiko TAKADA1990 Volume 67 Issue 4 Pages 249-256
Published: October 20, 1990
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSWe performed histological and histochemical investigations on the gastric glands of cats and dogs. So-called cardiac glands in the cat and dog have a small number of the parietal cells and the PAS-positive glandular cells in the base of these glands contain fine pepsinogen granules. Consequently, we consider them as undifferentiated gastric glands, and can find no differences between these glands in both animals. The immature chief cells in the cat gastric glands are distributed not only in the glandular body but also in the base of the glands and contain sialomucin, and weak and strong acid mucopolysaccharides. The mature chief cells in cat and dog gastric glands contain weak and strong acid mucopolysaccharides. The gastric gland region of the dog is divided into clear and dark zones, and structural differences between the two zones are recognizable. Namely, the chief cells in the glandular base in the clear zone are somewhat undifferentiated, while the chief cells in the middle and lower parts of the glandular body and those in the glandular base in the dark zone are perfectly differentiated. The structure of the gastric glands in the fundic and greater and lesser curvature regions in the cat is very similar.View full abstractDownload PDF (2341K) -
Yasuro ATOJI, Yoshitaka SUZUKI1990 Volume 67 Issue 4 Pages 257-261
Published: October 20, 1990
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSImmunohistochemistry using anti-bovine S-100 protein serum was examined in the bovine lymph node and spleen. In the lymph node, immunoreactivity was found in endothelial cells of lymph vessels and in endothelial and reticular cells of the sinuses. In the spleen, immunoreactivity was observed in endothelial cells of the trabecular artery, central artery, penicillar artery, sheathed artery, terminal capillary, trabecular vein and lymph vessel. In addition, the follicular dendritic cells in germinal centers both of the lymph node and spleen were stained with S-100 protein. These findings suggest that S-100 protein of the vascular systems may be related to the flow of lymph and blood.View full abstractDownload PDF (1733K) -
N. MATSUNAGA, T. AMEMIYA1990 Volume 67 Issue 4 Pages 263-270
Published: October 20, 1990
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSVascular casts demonstrated the capillary network and characteristic features of the inner surface of the capillaries in the chick pecten oculi. Pecten capillaries anastomosed freely with each other to form a complicated network of many layers of capillaries. The capillary diameter varied from capillary to capillary, and sometimes ampulla-like features were seen. Numerous pores in the casts of the capillaries corresponded to endothelial processes. Pits represented of nuclear imprints. These scanning electron microscopic findings in vascular casts were not incompatible with those seen by transmission electron microscopy.View full abstractDownload PDF (2276K) -
Kunio HASHIGUCHI, Kenji HASHIMOTO1990 Volume 67 Issue 4 Pages 271-279
Published: October 20, 1990
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSThe crystallographic alterations of the hydroxyapatite under the laser irradiation were evaluated by the x-ray diffraction pattern analysis and scanning electron microscopic observation. Recrystallization may occur in fused and resolidified dental enamel by the pulsed Nd: YAG laser irradiation. Two different grades of energy densities such as 400 pulses and 800 pulses were given to the powdered enamel. The irradiation was performed at a peak power of 500W with a pulse width of 10 msec.; the average output of 10W. spot size of 3mm and two pulses were given in every second. After the 800 pulses of Nd: YAG laser irradiation to the human dental enamel the x-ray diffraction pattern demonstrated both α- tricalcium phosphate and hydroxyapatite peaks. With the lower level of energy at 400 pulses, no significant differences were seen in the diffraction patterns between lased and unlased enamel. In scanning electron microscopic findings, there were no significant changes between lased and unlased enamel. When the unlased and lased enamel were exposed to acid solution, unlased enamel showed a honeycomb pattern, while the lased enamel showed preferentially removed prism core material.View full abstractDownload PDF (2632K) -
Yoshie IWAMA1990 Volume 67 Issue 4 Pages 281-287
Published: October 20, 1990
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSMouse pituitary gonadotropes were identified using immunohistochemical techniques with OsO4 single fixation. Most gonadotropes are immunostained with both LHβ and FSH antisera (FSH/LH gonadotropes), whereas a few gonadotropes are positive only for LHβ (LH gonadotropes). The former gonadotropes are large rounded or oval cells and contain two types of secretory granules: electron-dense smaller ones (about 100-200 nm in diameter) and electrontransparent larger ones (maximum diameter, about 400 nm) enclosed by a halo. The endoplasmic reticulum appears as a series of dilated sacs, and the Golgi apparatus is distinct. The mitochondria are found to have an electron-dense matrix throughout the cytoplasm, but are often concentrated in and around the region of the Golgi apparatus. These fine structural features are somewhat similar to those of the classical Barnes “FSH cell”. The LH gonadotropes are polygonal cells of medium size. Small granules, as described above, are seen, but large granules are not. The Golgi apparatus is distinct, but small. The LH gonadotropes resemble neither the Barnes “LH cell” nor the Kurosumi-Oota “LH cell”.View full abstractDownload PDF (2451K) -
Masahiko Y. KIDA1990 Volume 67 Issue 4 Pages 289-295
Published: October 20, 1990
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSTo contribute to the phylogenetic evaluation of the river dolphin, the morphology of the tracheobronchial tree of the Ganges river dolphin was analyzed according to Nakakuki's fundamental bronchial tree model of mammals. In the right lung, the bronchial tree consists of the tracheal bronchus, five lateral series bronchi, three dorsal series bronchi and one ventral series bronchus. In the left lung, it consists of five lateral series bronchi, four dorsal series bronchi and one ventral series bronchus. In the Ganges river dolphin, the tracheal bronchus corresponds to type III of Nakakuki's nomenclature. This characteristic is of especial interest in light of the fact that the Ganges river dolphin has a forestomach as do Artiodactyla.View full abstractDownload PDF (1730K)
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