巻号一覧
80 巻 (2003)
- 5.6 号 p. 103-
- 4 号 p. 71-
- 2.3 号 p. 35-
- 1 号 p. 1-
80 巻, 5.6 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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Motoki YATSUNAMI, Tetsuo TAI, Yutaka IRIE, Koichi OGAWA, Ryosuke MIYAU ...2004 年 80 巻 5.6 号 p. 103-114
発行日: 2004年
公開日: 2008/01/25
ジャーナル フリーTo elucidate the essential nature of the human obturator externus muscle (OE), the gross anatomy of the anomalous muscle and anomalous fasciculus originating from this muscle as well as the posterior division of the obturator nerve (P) were examined in 73 thighs of 45 Japanese adult cadavers. The investigation of anomalous muscle and anomalous fasciculus was effected by observation of the supernumerary muscular branch and supernumerary muscular twig from the P.
The anomalous muscle occurring between the adductor brevis muscle (AB) and adductor minimus muscle (AMi) (37/73 thighs; 50.7%) and the anomalous fasciculus fused to the posterior surface of the AMi (18/73 thighs; 24.7%) were detected. It was demonstrated by the course of the P and the suppling nerve, that the OE was divided into its superior fasciculus (or fasciculi) (SF) and main belly by the P, moreover the anomalous muscle originated from the former and the anomalous fasciculus from the latter.
Presumably, in the process of ontogeny, the SF of the original OE retained its original morphology (23/73 thighs; 31.5%), a part of the SF was converted to anomalous muscle (27/73 thighs; 37.0%), the entire SF was converted to anomalous muscle (10/73 thighs; 13.7%), and the entire SF underwent retrogression and disappeared (13/73 thighs; 17.8%). The presence (50/73 thighs; 68.5%) or absence (23/73 thighs; 31.5%) of piercing of the OE by the P seemed to depend upon the circumstances surrounding the morphological change in the SF. The original OE was considered to occur as an OE pierced by the P not possessing any supernumerary muscular branch or twig. Actually, the original OE was con.rmed to occur with a low frequency (15/73 thighs; 20.5%). It was inferred that the original OE readily underwent variation in the process of ontogeny due to the in.uence of the obturator nerve. The segmental composition of the obturator nerve was considered not to be involved in the morphological change in the OE.抄録全体を表示PDF形式でダウンロード (510K) -
Harumichi SHINOHARA, Satoru YASUTAKA, Yutaka TANIGUCHI, Rieko KOMINAMI ...2004 年 80 巻 5.6 号 p. 115-118
発行日: 2004年
公開日: 2008/01/25
ジャーナル フリーThis report describes fiber dissection technique for tracing the auditory pathway from the cochlear nerve to the medial geniculate body via the lateral lemniscus, inferior colliculus and inferior brachium. Some fibers of the lateral leminiscus appear to reach the thalamus in conjunction with fibers of the medial lemniscus.抄録全体を表示PDF形式でダウンロード (117K) -
Eiwa OGIHARA, Kazuhiko OGIHARA, Shigeo AIYAMA2004 年 80 巻 5.6 号 p. 119-126
発行日: 2004年
公開日: 2008/01/25
ジャーナル フリーLateral expansion of the lower dental arch has rarely been conducted clinically because the structure of the lower jaw is considered to be unsuitable for this type of treatment. However, successful lateral expansion of the lower dental arch using SCHWALZ, an orthopedic appliance has been reported in recent years. Therefore, an experimental study was performed to examine the histological changes in the lower alveolar bone when lateral expansion is applied to the lower dental arch for periods of up to 2 weeks. An active plate model based on the Schwarz appliance was attached to the first molar region in rats. The distance between the right and left first molars was measured, and the mandible and first molar tooth were processed for light microscopy at different times after the fitting. The lateral expansion caused by lateral movement of the right and left first molars following the application of the active plate amounted to an average of 1.06 mm over a period of 14 days. Alkaline phosphatase/tartrate-resistant acid phosphatase staining revealed bone deposition on the periosteal surface of the buccal alveolar bone and the periodontal surface of the lingual alveolar bone, whereas bone absorption was observed on the periodontal surface of the buccal alveolar bone and the periosteal surface of the lingual alveolar bone. These findings demonstrate that lateral expansion of the lower dental arch through the application of an active plate model was achieved by bony deposition and absorption of alveolar bone, similar to the process that occurs in association with lateral expansion of the upper dental arch.抄録全体を表示PDF形式でダウンロード (279K) -
Bibin Bintang ANDRIANA, Tat Wei TAY, Tsuyoshi TACHIWANA, Takeshi SATO, ...2004 年 80 巻 5.6 号 p. 127-136
発行日: 2004年
公開日: 2008/01/25
ジャーナル フリーThe phthalate esters have been used as plasticizers for various plastic products, and their testicular toxicity has been reported. In this study, the effects of mono(2-ethylhexyl) phthalate (MEHP), one of the phthalate esters, on prepubertal rat testes in vitro were examined. The testes of 20-day-old Sprague Dawley (SD) rats were cut into smaller pieces and seeded in medium, and then the specimens were obtained for light and transmission electron microscopic observations. As a result, at 1 hr after exposure to MEHP, TUNEL-positive spermatogenic cells were identi.ed, and they gradually increased in number in time- and dose-dependent manners. Ultrastructurally, apoptotic spermatogenic cells (characterized with chromatin condensation, cytoplasm shrinkage without membrane rupture, still-functioning cell organelles, and packed cell contents in membrane-bounded bodies), necrotic spermatogenic cells (characterized with swollen and ruptured mitochondria, plasma membrane lysis, spilt cell contents, and chromatin clumps), apoptotic Sertoli cells (highly condensed nuclei and nuclear membrane lysis) and necrotic Sertoli cells (marginated chromatins along the nuclear membrane, some swollen and ruptured cell organelles, e.g. mitochondria) could be identi.ed. Conclusively, based on transmission electron microscopic observations, MEHP treatment may affect spermatogenic cells, and lead them to necrosis. Thus, testicular tissue cultures and cell cultures are of advantageous for screening testicular toxicity of chemicals.抄録全体を表示PDF形式でダウンロード (737K)
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