巻号一覧
38 巻, 1 号
選択された号の論文の3件中1～3を表示しています
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Masami Nishi1962 年 38 巻 1 号 p. 1-23
発行日: 1962年
公開日: 2012/09/24
ジャーナル フリーThe macroscopical and microscopical structures of the medulla oblongata and the pons of the mouse, and the retrograde degenerative changes appearing in the dorsal vagal nucleus after division of the vagus in the cervical region are presented. To study these subjects, Nissl staining, a modification of Cajal's silver impregnation and myelin technique were used. The results obtained are summarized as follows:
1. The dorsal vagal nucleus is composed of cells of three types: the large, the medium-sized and the small. The large and the medium-sized cells have a well-defined nucleus with a clear nucleolus, and a moderate amount of Nissl granules. The small cells are spindly or oval in shape, with a comparatively large nucleus and scanty Nissl granules.
2. About 70 % of the cells in the dorsal vagal nucleus undergo chromatolytic changes following section of the cervical vagus. This proves that it is one of the main sources of vagal preganglionic fibers. The chromatolytic cells are most numerous in the rostral second one-fifth part, and decrease gradually toward the rostral and the caudal parts.
3. About 30% of the cells in the nucleus, however, show- no changes after the same operation. It seems that these unchanged cells are composed of afferent vagal cells and some efferent elements other than the efferent nerve cells concerning the cervical vagus.
4. The present results do not agree with the conclus i o n of some earlier workers who mentioned that the medial part of this nucleus is motor and the lateral is sensory.
5. It is difficult to confirm strictly the localization of cardiac innervation within the dorsal vagal nucleus, though the present results seem to support roughly the view that the caudal portion of the nucleus concerns with cardiac innervation.
6. A small proportion of vagal f ibers decussate within the medulla, since a few chromatolytic cells are found in the heterolateral nucleus after cutting the cervical vagus. However, the appearance and localization of changed cells in the heterolateral side are irregular.
7. No chromatolytic change occurs in the hypoglossal nucleus and the nucleus of the solitary bundle following division of the vagus in the cervical region.
8. Macroscopically aspects of the medulla oblongata and the pons of the mouse are described.抄録全体を表示PDF形式でダウンロード (3814K) -
R. K. Shrivastava1962 年 38 巻 1 号 p. 25-38
発行日: 1962年
公開日: 2012/09/24
ジャーナル フリーThe deltoid musculature of the orders Edentata, Pholidota and Tubulidentata is described on a comparative basis. The features of phylogenetic and functional importance of the same are pointed out.抄録全体を表示PDF形式でダウンロード (1430K) -
Setsuko Ogata1962 年 38 巻 1 号 p. 39-50
発行日: 1962年
公開日: 2012/09/24
ジャーナル フリーThe following conclusion was drown through cytological study on sertoli cells and spermatogenic cells of human testes of embryos from 4 to 10 months old, of boys and adults from 10 to 73 years old.
1) At the period of embryo, sertoli cell does not show ir r e gular form yet, but its whole figure is comparatively clearly seen. Nucleus is elliptical, with uneven nuclear membrane, and there is one or two nucleoli in the nucleus. Tubuli seminiferi contori are filled with primary spermatocytes, with no lumen remained. Occasional giant cells which are considered to be primary spermatocytes are recognized in the lumen.
2) Testis tissue of 10 years old is similar in the histological aspect to that of embryo, as regard to the feature of the lumen and to the appearance of giant primary spermatocytes.
3) Osminophilic granules can be found in sertoli cells as minute granules in embryos more than 5 months old. Though, they disappear temporarily at the age of 10 years, again they come out at the age of 14 years, and hereafter, they increase in number and grow into various sizes with age. Also, as to lipoid granules in sertoli cells of adults, they show positive reaction to the A s c hbel et Se I i g m a n's method. Accordingly they are considered to be close ly related to hormone secretion of testis.
4) In embryos, minute granules which are considered to be glycogen exist in the giant cell which is supposed to be a primary spermatocyte. And, in the specimens of 14 and 17 years old, the increase of the granules of various sizes were observed in the spermatogenic and sertoil cells, which showed the PAS reaction all over the cytoplasm in diffuse pattern and increased in number with age.
As these granules resisted against the saliva digestion, it is considered that they are not mere glycogen, but some complicated compound combined with albumin or other substances, and that they exist and are preserved as source of energy necessary to division of spermatogenic cells at the process of sperm formation.抄録全体を表示PDF形式でダウンロード (2277K)
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