巻号一覧
48 巻, 6 号
選択された号の論文の4件中1～4を表示しています
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Fumio Ito, Shigeko Miwa1972 年 48 巻 6 号 p. 347-359
発行日: 1972年
公開日: 2012/09/24
ジャーナル フリー1. The ultrastructure of leaf-like receptors in the frog sartorius muscle was studied. The receptor and its innervating axon were isolated with some muscle fibers after the characteristic patterns of afferent discharges were recorded from the axon.2. The stem myelinated axon divided into two or four branches and often further subdivided two or three times, before the d emyelination. The axon and branches were loosely wrapped by a perineurial sheath of one or two layers.3. There were a few preparations in which a very thin thread-like nonmyelinated fiber appeared in the vicinity of the Schwann cell nucleus located arround the ramification points of the myelinated axon but could not be detected at the last myelinated segments or more distally, except in two preparations where the stein axon was accompanied by a nonmyelinated fiber.4. Nonmyelinated sprouts of 0.1- to 1 a in diameter were emitted from the last nodes of the axon. They were encircled by a Sc hwann cell process with an interspace of approximately 200 A. These nonmyelinated sprouts appeared at first in the same perineurial covering as the last myelinated branch and then they appeared in a separate compartment.5. No structural difference between the low and high threshold receptor could be detected.354 Fumio Ito and Shigeko Miwa抄録全体を表示PDF形式でダウンロード (2300K) -
Kiichiro Saito1972 年 48 巻 6 号 p. 361-411
発行日: 1972年
公開日: 2012/09/24
ジャーナル フリーIt is an indispensable need to explore the structure and function of the terminal bouton for the studies of the neuronal transmission mechanism in the central nervous system. As for the structure of the terminal bouton, light microscopy has given some idea to the structural variations of terminal boutons which might be related to the input complex of the anterior horn neuron as the final common path. From this point of view, Wyckoff and Young (1956) studied the organization of the anterior horn neuron by light microscope and by the aid of electron microscope. Unfortunately, however, they have failed to establish the details of the contacts between the neurons and the terminal boutons. It may probably be due to the limit of preparation techniques and also of resolution power of electron microscope at that time.
As mentioned previously in the introduction, present work is a summarized observation on the terminal boutons and synaptic structures in the ventro-lateral part of the anterior horn (C6∼7) in the cat spinal cord. Almost all of the contacting types of the terminal boutons has been revealed in the previous OBSERVATION, though the statistical consideration has not been given yet. Compared with researches by Bodian (1966), Uchizono (1966), Conradi (1969) and so forth, it may be concluded as follows.抄録全体を表示PDF形式でダウンロード (10504K) -
Yasumichi Fujimoto, Hitoshi Okuda, Mihoko Yamamoto1972 年 48 巻 6 号 p. 413-426
発行日: 1972年
公開日: 2012/09/24
ジャーナル フリー1) A newly discovered case of the double superior venae cavae was described, in which the left superior vana cava descended symmetrically to the right one and connected with the coronary sinus.
2) An anastomosis between the right and left superior v enae cavae was not found. The present case belonged to Type 1 (RL) by the modified Yamadori's classification.
3) The complete pair e d azygos veins did not anatomose with each other. Both vessels communicated with the supreme intercostal vein emptying to the vertebral vein.
4) The right subclavian vein consisted of two channels, between which the M. subclavius was held. The bigger anterior channel was the main stream of the subclavian proper.
5) The left external iliac vein made a ring-formation through which the left iliolumbar artery passed.
Grateful acknowledgementi s made to P rof. Y. Ohta and Dr. T. Tokioka, lecturer, for their constant interest and guidance in this work.抄録全体を表示PDF形式でダウンロード (4446K) -
II. Small and Large IntestinesKyozo Takahashi, Fusao Yamasaki1972 年 48 巻 6 号 p. 427-451
発行日: 1972年
公開日: 2012/09/24
ジャーナル フリーThe small and the large i n testines of six Platanista whose body length ranged from 76 to 127 cm were observed macro- and light microscopically and the following results were obtained.
The duodenum consists of a funnel-shaped d u odenal ampulla and duodenum proper with no sphincter between them. The hepatopancreatic duct opens into the duodenum proper and the duodenal ampulla may deposit secreted bile. The inner surface of the ampulla is smooth, devoid of circular plicae. The Brunner's gland cannot be seen in any part of the duodenum.
The circular plicae w h ich begin at the duodenum proper almost disappear at the last ca.50 cm of the ileum. Instead, a distinct longitudinal fold, ca 30 cm long, was observed at the last part of the ileum. The lamina propria mucosae of this fold and its neighboring wall of the ileum contain many well-developed lymphatic nodules.
A distinct caecum was found at the juncture between the ileum and the colon.
The colon has no memorable transverse portion and continues to the short, rectum. No signs of teniae and haustrae were found on the caecum and the colon. The anus, from the anal orifice to the recto-anal epithelial transition, is very long.
The goblet cells are very scarce i n the small and the large intestines, except for the rectum.抄録全体を表示PDF形式でダウンロード (4599K)
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