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Volume 73, Issue 6
Displaying 1-5 of 5 articles from this issue
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Iwao SATO, Ryuji UENO, Masataka SUNOHARA, Katsuya SUZUKI, Takayuki KAW ...1997 Volume 73 Issue 6 Pages 283-292
Published: March 19, 1997
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSSummary: The jaw muscles of a turtle [Mauremys (Clemmys)japonica(MCJ)], have been analyzed for the histochemical characteristics of their fiber types. Six jaw muscles of the MCJ have been analyzed for histochemical characteristics of their fiber types. In this study, fiber types in two groups of muscles are classified; 1) fast twitch glycolytic (FG), fast twitch oxidative glycolytic (FOG), slow twitch oxidative (SO), and tonic fibers, according to the system of Putnam et al. (1980); 2) reacted differently in similar histochemical tests and classified, respectively, as various types. Especially tonic fibers constituted low percentage in the MAMP (ca.,0.3%), MI (ca.,3.9%) and MPtp (ca.,1.0%) were found. These results suggested that the tonic fiber play a small part of the function in jaw movement.View full abstractDownload PDF (2687K) -
Masahiro YAMASAKI1997 Volume 73 Issue 6 Pages 293-299
Published: March 19, 1997
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSSummary: The thyroid and thymic arteries were investigated in 36 male and 36 female house musk shrews. The superior thyroid artery was constant. The artery arose, in the most instances, from the external carotid and common carotid arteries. The artery, in about one fourth instances, sent both the superior and inferior branches supplying the gland and the former branch terminated in the superior and inferior laryngeal arteries. The latter branch was independent in the remaining instances. The superior laryngeal artery was independent in a few specimens. In some instances, the superior thyroid artery did not send the inferior laryngeal which was the terminal branch of the tracheo-esophageal artery arising mainly from the subclavian and costocervical trunk. The middle thyroid artery was rare only appearing in one male specimen. The inferior thyroid and the thyroid ima arteries were absent in both sexes. On the other hand, the independent thyroid arteries arising from the external carotid, occipital, common carotid and internal carotid arteries appeared in high frequency (89% per body side in an average) in that order of frequency. Most of them may be some separated component of the superior thyroid artery. The middle thymothyroid artery was absent.
The inferior thymic artery arising from the costocervical trunk or the internal thoracic (49% in an average) and the middle thymic artery arising from the subclavian (52%) shared the arteries supplying the intra-thoracic thymus. The supreme thymic and the superior thymic arteries were very rare, occurring in only one specimen, respectively.
These results show that both the thyroid and thymic arteries in house musk shrews are very simple and seemingly basic, although there are some features characteristic only to this animal.View full abstractDownload PDF (1799K) -
S. SETOYAMA, M. ZHOU, N. GOTO, K. SHIMADA1997 Volume 73 Issue 6 Pages 301-312
Published: March 19, 1997
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSSummary: Comparative morphological and morphometric studies of the motor trigeminal nucleus (MTN) were carried out on the brains of an alligator, a human being and a rat for the first time. Differences in neurons regarding sizes, areas, numbers, column volumes, neuropil indices and circularity ratios were found. The results showed that the positions and shapes of the MTN were different, and the shapes of motor neurons were different, too. The average area of motor trigeminal neurons was the largest in the alligator, compared with the area in the human being, and the rat; the number of neurons and the column volume of MTN were the largest in the human being. As for the neuropil indices, the value was in descending order: alligator, human being and rat; whereas for the circularity ratio of neuronal cell bodies, the order was: rat, alligator, and human being. We concluded that the size of motor neurons in the MTN may be related to the power of masticatory muscles, and there may be a connection between jaw sizes and shapes and sizes of the motor neurons in the MTN.View full abstractDownload PDF (2791K) -
Nobuaki IMANISHI, Hideo NAKAJIMA, Sadakazu AISO1997 Volume 73 Issue 6 Pages 313-323
Published: March 19, 1997
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSSummary: The arterial anatomy of the ear was investigated using seven auricles of seven fresh cadavers that had been injected systemically with a lead oxide gelatin mixture. The blood supplies of the upper portions of the helix, antihelix and scapha, triangular fossa, tragus and lobule were from the branches of the superficial temporal artery. The blood supplies of the chonca, the middle and lower portions of the helix and scapha, the lower part of the antihelix and most of the posterior auricular surface except the lobule were from the branches of the posterior auricular artery. The posterior auricular artery found to be the dominant blood supply for the ear.View full abstractDownload PDF (2556K) -
Takashi UEDA, Osamu FUJIMORI, Kazuyori YAMADA1997 Volume 73 Issue 6 Pages 325-334
Published: 1997
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSSummary: In the rat subfornical organ (SFO), lectin-binding glycoconjugates were histochemically examined by 9biotinylated lectins using a streptavidin-biotin peroxidase system. The strong or moderate bindings of Canavalia ensiformis (Con A), Lens culinaris (LCA) and Phaseolus vulgaris erythroagglutinin (ePHA) indicated overall distributions of high mannose, intermediate, hybrid N-linked, and non-bisected and bisected, bi/triantennate N-linked complex oligosaccharides in the rat SFO. Nonsialylated terminal N-acetylglucosamines were detected throughout this organ, as revealed by its stainabilities with Triticum vulgaris (WGA) and Limax flavus (LFA). In this organ, Ricinus communis (RCA-1) specifically bound to vessel-associated structures, whereas Arachis hypogaea (PNA) reacted with selected neurons in the central and rostral regions of this organ. Dolichos biflorus (DBA) and Ulex europaeus (UEA-1) did not stain any histologic structures in the rat SFO. The results obtained in this study provide a basis for comprehensive analyses of glycoconjugates in the rat SFO.View full abstractDownload PDF (3761K)
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