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Volume 52 (1975 - 197･･･
- Issue 6 Pages 285-
- Issue 5 Pages 233-
- Issue 4 Pages 151-
- Issue 2-3 Pages 59-
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Volume 52, Issue 6
Displaying 1-4 of 4 articles from this issue
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Akira Tokunaga, Katsumi Otani, Jinzo Yamada1976 Volume 52 Issue 6 Pages 285-295
Published: March 20, 1976
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSThe cortical projection fibers were studied with the Nauta-Gygax method on six goats after sigmoid cortical ablations.
Pyramidal tract: Cortico-thalamic fibers terminated ipsilaterally in the ventral thalamic nuclear group, the centre median and para- fascicular nuclear complex and a part of the thalamic reticular nucleus. In the midbrain, considerable preterminal fibers were found in the red nucleus and the lateral part of the central gray matter.
The ventral part of the gigantocellular region of the medial reticular formation in the upper medulla received a small number of cortical fibers.
After pyramidal crossing, some of the fibers terminated in the posterior funicular nuclei, and remaining fibers were traced predominantly through the ventral intracommissural bundles as far as the third cervical segment and less prominently through the nuclei proprius posterioris and reticularis spinalis down to the second cervical cord.
Bagley's bundle: At the most rostral end of midbrain, many degenerating fibers left the ipsilateral cerebral peduncle to gather on the dorsal border of the substantia nigra. The discrete bundle ran more caudally through the dorso-lateral tegmentum to the medulla and was distributed ipsilaterally to the rostral part of the magnocellular subnucleus of the caudal and the oral trigeminal spinal tract nucleus.View full abstractDownload PDF (2730K) -
Scanning Electron Microscopic Studies on the Oral Mucosa 3Ikuo Yoshioka, Hiroshi Muto1976 Volume 52 Issue 6 Pages 297-311
Published: March 20, 1976
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSThe tongue, the palate and the buccal mucosa were excised from 5 male rats aged over 300 days, and were observed by scanning electron microscope. The results obtained were as follows:
1. In the anterior dorsal filiform papillae of the tongue, the epithelial cells of papillary spine overlapped each other to antero-posterior direction. The filiform papillae on the anterior part of the body of the tongue showed conical form or lingual form which varied from the conical form. The former which was mostly seen on the tip of the tongue was fewer in number than the latter. The posterior part of the body of the tongue was characterized by the presence of the filiform papillae, from the base of which rose 2 to 5 secondary papillae.
2. In some individuals, the spine of the filiform papillae was generally marked owing to numerous transverse furrows, but the fur- rows were not visible on the surface of the large filiform papillae on the intermolar eminence. In some animals, it was observed that the tip of these papillae remarkably bent toward the posterior direction in general.
3. Distinct terminal sulcus was not recognized. The base of the tongue was even and the duct of lingual glands opened on its surface.
4. The gemmal papillae on the soft palate were described. This papilla was round or oval in shape and was not flat in the surface with one taste pore.
5. The papillae projected from the oral surface were seen on the buccal mucosa. These papillae which were named buccal papillae by the authors were initially described in this paper.View full abstractDownload PDF (3023K) -
Fusao Yamasaki, Kyozo Takahashi, Toshiro Kamiya1976 Volume 52 Issue 6 Pages 313-329
Published: March 20, 1976
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSSixteen livers of Pontoporia blainvillei were observed macro- and light microscopically.
The liver of Pontoporia consists of left and right lobes and is cylindrical as a whole. Its cranical surface is rather flat with two eminences at the lateral ends. At the dorsal surface of the left lobe, a great U-shaped notch which is formed by the lower end of the oeso- phagus and the upper right part of the main stomch is observable, which we have designated as the oesophago-gastric notch.
The ratio of liver weight to body weight ranged from 1.9 to 3.0 per cent (average 2.6%).
The area nuda shows a triangular shape as in other cetaceans so far examined, except for Platanista which has no area nuda.
The vena cava inferior is completely embedded in the hepatic parenchym in most cases observed. Two hepatic venous sinuses, one coming from the left and the other coming from the right lobe, can be seen pouring into the vena cava inferior.
We have also compared our above mentioned results with those of other cetaceans, especially with those of Platanista and Inia.View full abstractDownload PDF (6326K) -
Chikayoshi Oura, Gentaro Usuku1976 Volume 52 Issue 6 Pages 331-339
Published: March 20, 1976
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSAn easy and accurate technique was devised for electron microscopical observation of the selected region in a wide tissue area. Serial one micron Epon sections were obtained by use of an ultra-microtome, stained with toluidine blue, and placed on a glass microscope slide. A small wire-loop was used for picking up and transferring of sections. A selected section of the serial sections was freed from the slide and mounted on the facet of another prepared Epon block. By warming the section-mounted block in an oven, the section was let stick fast to the block surface. The most important portion of the mounted section was ultrathin-sectioned in the ordinary way for electron microscopy. As for the thickness of initial serial sections, one micron was most suitable for light microscopy and ultrathin-sectioning.View full abstractDownload PDF (1899K)
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