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Volume 60 (1983 - 198･･･
- Issue 6 Pages 389-
- Issue 5 Pages 311-
- Issue 4 Pages 195-
- Issue 2-3 Pages 73-
- Issue 1 Pages 1-
Predecessor
Volume 60, Issue 4
Displaying 1-5 of 5 articles from this issue
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Yoshiko K. TAKEUCHI, Hisashi SAKAI, Ikuo K. TAKEUCHI1983 Volume 60 Issue 4 Pages 195-209
Published: 1983
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSCongenital microphthalmic offspring were obtained by intraperitoneal injection of pregnant rats with 3 mg/kg cadmium sulfate (CdSO4) on gestational day 8. The offspring were reared for two months, and histological abnormalities of their neural retinae were examined light microscopically. Severe reduction in the thickness of the neural retina, which was associated with the absence of some of the nine layers, the formation of numerous rosettes and folds, and the inversion and overlap of some retinal layers, were found in the microphthalmic eyes. In the regions where numerous rosettes and folds were formed in the neural retinae, retinal pigment epithelia were frequently detached and far removed from the neural retinae. Some of these abnormalities were also encountered in the normal-sized eyes of the offspring of CdSO4 -treated mothers. These observations showed that the CdSo4 induced congenital microphthalmic rats have the same histological abnormalities as in the "retinal dysplasia"reported in human eyes and those of many other mammalian species under various pathological conditions.View full abstractDownload PDF (2806K) -
Shigeru KOBAYASHI, Taeko SHIMODA, Akitatsu SHIMAMURA1983 Volume 60 Issue 4 Pages 211-217
Published: 1983
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSThe tongues of the Insectivora; House Musk Shrew (Suncus murinus riukianus), Temminck's Mole (Mogera kobeae), and Furry Snouted Shrew Mole (Dymecodon pilirostris), were observed by lens and scanning electron microscope.
The tongue and lingual apex of the three species were distinct from each other. In House Musk Shrew, the tongue tapered and lingual apex was pointed, in Temminck's Mole rectangular and flat, and in Furry Snouted Shrew Mole elliptical and rounded. On the tongue roots of all of the species, two vallate papillae were observed. Those shapes were different. However, foliate papillae were not observed in all of the species. The fungiform papillae were scattered among the filiform papillae, and their distribution was different. The shape and distribution of filiform papillae were different. On the dorsal tongue, the sulcus terminals, sulcus medianus linguae, and lingual prominence were absent in all the species.
In only the Furry Snouted Shrew Mole's anterior margin were the papillary projections markedly distinct from the lingual papillae of the tongues observed.View full abstractDownload PDF (1363K) -
Miyako OKINAGA1983 Volume 60 Issue 4 Pages 219-241
Published: 1983
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSNC-strain mice have a constitution, that anaphylactic shock is very likely to occur, so if ovalbumin is administered in terms, almost all the mice die of shock by the third injection. The more sensitizations were performed, using ovalbumine as an antigen, the profunder became the mices allergic condition. The number of mast cells increased especially in the fascicular zone of the adrenal glands and the fluorescence intensity of them became stronger. Under light microscopic studies, the granules in a cell decreased and they were stained bluish purple by toluidine blue and under electron microscopic studies the number of the granules increased with high electron density. Once, either ovalbumin or compound 48/80 was injected under these allergic conditions, the mice showed remarkable symptoms of allergy and many of them died of anaphylactic shock. The fluorescence of histamine in the mast cells decreased and most of the mast cell granules stained pink. Under the electron microscopic studies the density of the granules decreased extremely and most of them were swollen, some of them united with each other and others released themselves from the plasma membrane. Whenever prednisolone was injected the day before the challenge or compound 48/80 the allergy symptoms were not serious. The granules became small and stained dark blue and there occurred only a small amount of degranulation. The density of the granules increased tremendous and there were many granules which had a surrounding space between the cytoplasm and themselves. Through pretreatment with prednisolone, the fluorescence intensity of histamine became slightly weaker than before. But after the challenge or compound 48/80, it scarcely changed. The symptoms of shock, changes of granules and the release of histamine etc. were clearly protected by pretreatment with prednisolone.View full abstractDownload PDF (5013K) -
Masaki MATSUMOTO1983 Volume 60 Issue 4 Pages 243-267
Published: 1983
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSThe posterior auricular artery and its whole ramifications of the cat were investigated by means of the acryl plastic injection method. This artery arose directly from the second curvature of the external carotid artery or rarely in common with the superficial temporal artery, between the origins of the digastric and the styloglossal muscles, and gave rise to the styloglossal, the sternomastoid, the mandibular glandular and the mandibular lymph nodular branches on the lateral side of the styloglossal muscle. The stylomastoid artery, one of the important branches of this artery, gave off branches to the external auditory meatus and the mucous membrane lining the tympanic cavity. The parent artery then gave rise to the temporal branch, and many branches supplying the auricle: the primary lateral, the secondary lateral, the intermediate auricular and the occipital branches. It finally divided into the medial auricular and the frontal branches. The main stream of this artery represented an important vessel which sent not only a majority of the blood to the auricle, but also to the middle ear and the retromandibular region.View full abstractDownload PDF (5111K) -
Shigenori OKADA1983 Volume 60 Issue 4 Pages 269-293
Published: 1983
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSThe present paper deals with the ultrastructure of the amelogenesis of the upper major incisor of the rabbit. Ultrastructural changes in the enamel organ of the rabbit incisor, compared to those of the rat incisor, are described on the basis of a classification into six zones/stages, ranging from the growing end to the junctional epithelium, as follows: proliferation, differentiation, secretion, early maturation, late maturation and regression.
The inner enamel epithelial cells of the proliferation stag e had wide intercellular spaces with the mitochondria located distally towards the dental papillary cell. The metabolic pathway was therefore considered to be established through this distal site. During the differentiation and secretion stages, the nucleus and mitochondria were located on the basal side (towards the stratum intermedium), but the r-ER and Golgi apparatus were on the distal side. The intercellular spaces became narrower and terminal webs were found on both the basal and distal sides. Numerous secretory granules were formed in the well-developed Golgi apparatus. The Tomes' process disappeared in the early maturation stage, and the enamel matrix began to be absorbed. In the late maturation stage, respective groups of ruffle-ended and smooth-ended ameloblasts were found one after the other three or four times. Intracellularly, a network arrangement of tonofibrils was observed in the regression stage. The cells of the stratum intermedium in both the differentiation and secretion stages prolonged their cellular processes, being interconnected by many desmosomes, and surrounded the basal cone-like projection of the ameloblasts. In the early and late maturation stages, flat-arranged papillary cells in contrast to those of the rat, contacted the blood capillaries. In the regression stage, the tonofibrils ran along the cell axis and the half desmosomes paralleled the basement membrane facing the surrounding connective tissue. The stellate reticulum began to decrease suddenly in the differentiation stage and finally disappeared in the middle of the secretion stage.
The outer enamel epithelial cells were transformed into a cylindrical, cubical and flattened shape in the proliferation stage, and arranged in a wavy course, holding fenestrated blood capillaries in the differentiation and secretion stages. The enamel formation of the rabbit incisor ended within a short period, in accordance with a shorter, early maturation and longer, late maturation, as well as other characteristic features of the enamel organ.View full abstractDownload PDF (6518K)
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