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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-
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Volume 67, Issue 5
Displaying 1-10 of 10 articles from this issue
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Bunsuke OSOGOE, Tetsuo FUKUMOTO1990 Volume 67 Issue 5 Pages 297-302
Published: December 20, 1990
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSIn an earlier series of studies on cellular labeling with [14C]adenine ([14C]A) in adult rats, Osogoe and his colleagues demonstrated the occurrence of certain cell types which are capable of incorporating [14C]A to a particularly great extent, such as the immature forms of either macrophage or fibroblast or reticulum cell lines. Further investigations have revealed that, among such cell types, a few fibroblastoid cells in the interstitium of the kidney and lung, as well as the proliferative reticulum cells in the intestinal lamina propria, express Ia antigen. In the present study, the reticulum cells in the lymphoid tissues and an appreciable number of mesenchymal cells in the interstitium of the heart and liver were also found to express Ia antigen. These two types of la-positive cells were characterized by a large cell body having a large euchromatic nucleus and abundant cytoplasm with dendritic processes. However, the mesenchymal cells were found in the interstitial tissue space of the organs, mostly scattered singly or occasionally grouped in small cell aggregations, without coexisting lymphoid cells. The biological significance of the Ia antigen expression by the two cell types, in particular the mesenchymal cells, is discussed in relation to their capacity for uptake of [14C]A.View full abstractDownload PDF (2034K) -
Fumihiko SUWA, Akimichi TAKEMURA, Yhuji EHARA, Noriaki TAKEDA, Mitsuhi ...1990 Volume 67 Issue 5 Pages 303-308
Published: December 20, 1990
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSVariations in the patterns of origin of the inferior alveolar, the posterior deep temporal and the masseteric arteries when the maxillary artery passed medial to the pterygoideus lateralis muscle on 30 sides of 24 heads (10.8%) among a total of 278 sides of 139 heads of the Japanese, were investigated. The results obtained may be summarized as follows: 1. The maxillary artery gave off a common trunk between the inferior alveolar and the posterior deep temporal (76.7%), the latter distal to the former (16.7%) and in contact with their origins (6.7%). The masseteric artery always arose from the posterior deep temporal in 24 heads.2. The above-mentioned common trunk was observed in 52.1% of males and 47.9% of females, as well as on 56.5%of left sides and 43.5% of right sides.3. It can be said that the maxillary artery always passed medial to the pterygoideus lateralis, when the inferior alveolar arose in common with the posterior deep temporal.View full abstractDownload PDF (1717K) -
Michitaka MURAKAMI, Toshikazu NAGATO, Hiroaki TANIOKA1990 Volume 67 Issue 5 Pages 309-314
Published: December 20, 1990
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSMyoepithelial cells in the intercalated ducts of rat parotid and exorbital lacrimal glands were examined by scanning electron microscopy. The basal surface of the intercalated ducts revealed myoepithelial cells running parallel with its long axis. These myoepithelial cells were linked with one another, forming a well-developed network, and numerous wrinkles running transversely were observed on the surface of the myoepithelial cells. Also, some myoepithelial cells in the terminal portion linked with those in the intercalated duct. Based on these findings, it is suggested that myoepithelial cells in the intercalated duct may function as a protective wall against constriction of the narrow lumen of the intercalated duct when it is subjected to pressure by the surrounding tissues.View full abstractDownload PDF (2188K) -
Kiyotada KATO, Paul HOPWOOD, Tatsuo SATO1990 Volume 67 Issue 5 Pages 315-324
Published: December 20, 1990
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSThe origin, course and distribution of the cutaneous nerves of the cervical plexus were examined in the crabeating macaque (4 body-halves), the grey kangaroo (5 body-halves) and koala (3 body-halves). The cutaneous nerves, n. auricularis magnus, nn. supraclaviculares, n. transversus colli, and n. transversus cervicis, were recognized. Cranial and caudal branches were identified in the latter 2 nerves. Some intermediate, relatively small branches were recognized between these main nerves. The n. occipitalis minor was not recognized in all our specimens. Four segmental nerves, C2 to C5, gave rise to all the cutaneous nerves and branches of the cervical plexus described. However, between species there was some variation. In the crab-eating macaque the n. auricularis magnus and n. transversus colli tended to arise from a lower segment than in the grey kangaroo and koala. In the grey kangaroo the nn. supraclaviculares arose from a lower segment than in the crab-eating macaque and koala.View full abstractDownload PDF (1930K) -
Masatake IMAI, Taizo SHIBATA, Keiichi MORIGUCHI, Yoshihiko TAKADA, Hir ...1990 Volume 67 Issue 5 Pages 325-331
Published: December 20, 1990
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSThe glands distributed in the narrow region of the abomasum contiguous to the omasum of the cow have been described as cardiac glands. We doubted this assertion and therefore performed histological and histochemical investigations of the glands to clarify their characteristics.1. All glandular cells except the parietal cells in a few glands contiguous to the omasum react strongly to PAS, AB(pH 2.5), and PAS-AB(pH 2.5) staining, and moderately to AB(pH 0.5) staining.2. Glandular cells at the base of these glands contain fine pepsinogen granules and a few parietal cells are distributed in these glands, indicating that they are undifferentiated gastric glands and that the so-called cardiac glands do not exist in the cow stomach.3. Glandular cells in undifferentiated gastric glands are filled with PAS, AB(pH 2.5 and 0.5) and PAS-AB(pH 2.5)positive substances. Which gradually decrease and finally disappear with differentiation, remaining only in the neck (mucous neck cells) and the cells in the upper part of the glandular body (immature chief cells), in mature gastric glands.4. Mature chief cells in differentiated gastric glands are distributed in the middle and lower bodies and base of the glands and contain a number of PAS and PAS-AB(pH 2.5) positive granules and a large number of coarse pepsinogen granules, while pepsinogen granules in the mucous neck cells and immature chief cells are finer.5. In the cow the region in which undifferentiated gastric glands are located is very narrow.6. Parietal cells in the cow stomach are numerous.7. The glandular region contiguous to the omasum in the cow and the proventriculus in the horse and swine is regarded as the cardiac region. However, the esophageal orifice to the rumen and proventriculus is the cardia. Accordingly, the caudal portion of said orifice should be called the cardiac region.View full abstractDownload PDF (1905K) -
Yoshie IWAMA, Takashi NAKANO, Kaori HASEGAWA1990 Volume 67 Issue 5 Pages 333-337
Published: December 20, 1990
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSMost gonadotropes in the pituitary of male Suncus murinus L. are immunostained with both LHβ and FSH antisera, whereas only a few gonadotropes are poshitive only for LHβ. The former gonadotropes consist of polygonal or polyhedral cells of medium size, and can be identified by the presence of two types of secretory granules of low density: smaller ones (about 150-250 nm in diameter) which are spherical in shape, and larger ones of irregular form with a maximum diameter of about 1,500 nm. The endoplasmic reticulum is not prominent, while the Golgi apparatus is distinct. Mitochondria are found 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 cells” and Kurosumi-Oota “FSH cells”.View full abstractDownload PDF (2237K) -
Hidekazu WAKURI, Tatsuma MORI, Ken-ichiro MUTOH1990 Volume 67 Issue 5 Pages 339-350
Published: December 20, 1990
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSA full-term female newborn calf of the Japanese black short-horn breed which was two-headed (dicephalus)and had two incomplete necks was carefully dissected. The calf was one of twins, the other being a normal male. There was no record of reproductive problems with the cow. The left and right heads were of almost the same size and shape. Each head had a nose, mouth, eyeballs, and ears. The brains were very congested. That is to say, in both the left and right brains, the longitudinal fissure was unclear, and these was narrower pattern in the cerebral gyri. The surfaces of the two brains displayed poly-or microgyria-like features. The cerebellar gyri ran longitudinally among the occipital lobes of the cerebral hemispheres. The caudal half of the cerebrum, the cerebellum and the brain stem were distorted ventrally at an angle of approximately 80 degrees. Twisting of the brain stem was observed in the right brain. The end of the medulla oblongata and a tongue-like process of the cerebellum extended through the foramen magnum of the skull into each enlarged vertebral canal (Arnold-Chiari malformation). They extended under the arch of the each 2nd cervical vertebra. The 4th ventricle was also displaced and irregularly dilated. The two necks were conjoined in the single 3rd cervical vertebra at an angle of approximately 45 degrees to each other. The one trunk was slightly distorted. The ribs revealed the presence of a left 14th extra tib. In the lumbar region, spina bifida was apparent. The pelvis was distorted asymmetrically. The tail was short. The viscera appeared as one set, but the rectum and anus were duplicated. Although the calf displayed female features, the vagina was undeveloped. The four limbs appeared normal and the joints moved freely.View full abstractDownload PDF (5687K) -
Hidekazu WAKURI, Yasuko SAKUMA, Ken-ichiro MUTOH, Schuichi WATANABE1990 Volume 67 Issue 5 Pages 351-363
Published: December 20, 1990
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSIn 6 equine specimens of both sexes, the morphological features of the cleavage lines of the skin over the entire body were examined using a metal probe with a sharp conical point. Wounds were produced on the skin with the probe and painted with Chinese white or Indian ink. The direction of running of the cleavage lines was determined from their relationship to the long axis of each region or area of the physical structure. The cleavage lines of the head and face revealed a fixed pattern in all specimens. They were similar to those of equine fetuses of 6 to 7 months of age. A transverse pattern was found on the skin of the neck, trunk (abdomen), roots of the ear and tail, and external genital labium, except in some localized areas. The cleavage lines of the free extremities of the appendages already displayed a strikingly longitudinal pattern. A horizontal pattern was found in the middle costal region. It was clearer in the adult horse than in the equine fetus. The cleavage lines were annular in arrangement on the skin around the nares, eyes, and preputial orifice. They showed a convergent pattern on the skin of the metacarpal and metatarsal calcars, the umbilicus and anus. Some aspects of the skin tension were compared between the horse and certain other animals.View full abstractDownload PDF (5340K) -
Masahiro IKEDA, Shigenori OKADA1990 Volume 67 Issue 5 Pages 365-379
Published: December 20, 1990
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSThe hairs of the upper lip are designated as the sinus hairs morphologically and as the tactile hairs functionally. The characteristics of the sinus hair include the equipment of a follicular blood sinus, composed of cavernous and ring sinuses located between the external and internal radical dermal capsules. The present paper deals with microvascular architectures examined under SEM using plastic microvascular casts. The arterioles diverging from the superior labial artery divided into two groups near the external capsule. The radical arterioles passed through an opening at the bottom of the capsule and formed the capillary network of the hair papilla, in part communicating with the network of the radical dermal capsule. The subcapsular arteriole penetrated the external capsule and passed in the cavernous sinus up to the internal capsule, where the capillary network of the radical dermal capsule was formed. Its meshes appeared polygonal of the papilla site and elongated at the epithelial site. The follicular blood sinus extended between the sebaceous gland and the papilla radix of the sinus hair. In its papillary two-thirds, the cavernous sinus was formed by connective tissue trabeculae and in the epithelial one-third the ring sinus was formed in the shape of a doughnut without trabeculae. Locational differences in the meshes of both networks of the hair papilla and the radial dermal capsule were apparent according to the extent of the nutrient supply to the internal and external root sheathes. The follicular blood sinus acted as a reducing apparatus against the external forces pressing on the sinus hair and the cavernous sinus may serve to enhance the function of the tactile apparatus.View full abstractDownload PDF (5204K) -
Tooru NAKANISHI, Yasutomo IWAI-LIAO1990 Volume 67 Issue 5 Pages 381-404
Published: December 20, 1990
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSThe genesis, differentiation, development and growth of the ear-ossicular joints and temporomandibular joint (TMJ) in the SIc-ICR mouse were studied by means of light and transmission electron microscopy. The differentiation of the ossicular joints and TMJ anlagen was initiated during the fetal stages. Although morphogenesis, development and growth of the TMJ were already evident in the prenatal stages, the joint-cleaving associated with the occurrence of interzones in the cartilaginous ossicular chain was observed during the neonatal stages. However, the simple diarthrodial ossicular joints were completed and became mature earlier than the double synovial TMJ having an articular disc in early postnatal life. TEM examinations revealed that the articulating epiphyseal cartilage of the ossicular joints consisted of hyaline cartilage, while the intracapsular structures in the TMJ were composed of fibrocartilage. The synovium of the diarthroidal joints was supplied by blood vessels, nerve fibers, collagen and elastic fibers. No distinct aging in the cellular and fibrous components of the synovial tissue of the completed TMJ and ossicular joints was evident in the present study.View full abstractDownload PDF (8152K)
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