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Volume 83 (2006)
- Issue 4 Pages 97-
- Issue 3 Pages 73-
- Issue 2 Pages 35-
- Issue 1 Pages 1-
Predecessor
Volume 83, Issue 3
Displaying 1-4 of 4 articles from this issue
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Shoichi EMURA, Toshihiko OKUMURA, Huayue CHEN, Shizuko SHOUMURA2006 Volume 83 Issue 3 Pages 73-76
Published: 2006
Released on J-STAGE: August 20, 2007
JOURNAL FREE ACCESSThe dorsal 1ingual surfaces of the raccoon dogs (Nyctereutes procyonoides) and fox (Vulpes vulpes japonica) were examined by scanning electron microscopical (SEM) observations. The distribution and type of the lingual papillae found in the raccoon dog were similar to those in the fox. Filiform, fungiform, foliate and vallate papillae were observed. The filiform papillae were distributed over the entire dosal surface of the tongue. Each filiform papilla on the apical surface of the tongue had several pointed processes. The filiform papillae of the 1ingual body consisted of a main papilla and some secondary papillae. The fungiform papillae were present rounded bodies, and more densely distributed on the lingual apex. The foliate papillae were seen on the dorsolateral aspect of the tongue. The vallate papillae were located on both sides of the posterior end of the lingual body. Each papilla was surrounded by groove and crescent pad. On the periphery of the papillae, 1arge conical papillae were observed.View full abstractDownload PDF (274K) -
Jun YAN, Jiro HITOMI2006 Volume 83 Issue 3 Pages 77-84
Published: 2006
Released on J-STAGE: August 20, 2007
JOURNAL FREE ACCESSThe communicating branch between the ventral rami of cervical nerves and the spinal accessory nerve (SAN) has been reported to also send motor fibers to supply the trapezius. However, the motor fiber type of the communicating branch and its peripheral distribution are still unclear. To determine the fiber elements within the branch and its peripheral distribution of the motor fibers in the trapezius, the anterograde tracing method was used in this study. The results show that a few α motor end plates from the communicating branch were observed on the extrafusal fibers, while in the muscle spindle the motor elements from the communicating branch were distributed to the polar portions of the intrafusal fibers. These results indicated that the motor fibers passing through the communicating branch to supply the trapezius are mainly γ motor fibers, with some α motor fibers. Moreover, the α and γ motor fibers from the communicating branch were observed in the clavotrapezius, acromiotrapezius and the rostral part of spinotrapezius. These findings also correlate with the clinical observation indicating that even when the spinal accessory nerve is injured, the trapezius is stil1 capable of slight movement.View full abstractDownload PDF (252K) -
Hirohiko KAKIZAKI, Masahiro ZAKO, Takashi NAKANO, Ken ASAMOTO, Osamu M ...2006 Volume 83 Issue 3 Pages 85-90
Published: 2006
Released on J-STAGE: August 20, 2007
JOURNAL FREE ACCESSThe present study aimed to elucidate microscopically the precise structure of the generally termed ‘lateral canthal tendon’ (LCT). Specimens from 9 post-mortem lower eyelids of 6 Japanese aged from 72 to 91 years old at death were fixed in 10% buffered formalin, and microscopically examined. Specimens were excised as exenterated samples including an area 5 mm wider than the orbital aperture. The removed contents were further incised longitudinally on the central eyelid and also incised parallel to the upper eyelid margin on the site 3 mm from its margin. After the preparation of microscopical examination, sections of all 9 eyelids were stained with Hematoxylin and Eosin. We found that the structure generally termed LCT consisted oftwo definitive different layers microscopically. The superficial layer was only an orbital septum (septal band). It was mainly constituted of thick fibers between adipose-rich tissues. The deep layer continued from the tarsus and projected posteriorly; which was a ligament (tarsoligamentous band). This tissue was constituted by thin, minute fibers with little adipose tissues. The structure generally termed LCT is not a tendon but a complex constitution of an orbital septum and a ligament; which we named, in a mass, ‘lateral canthal bands’, cooperatively supporting the lateral canthus.View full abstractDownload PDF (222K) -
Zhang YIHONG, Yoshitaka TAMADA, Keisuke AKAI, Fumihiko SUWA2006 Volume 83 Issue 3 Pages 91-96
Published: 2006
Released on J-STAGE: August 20, 2007
JOURNAL FREE ACCESSIt has been reported that the spinal trigeminal nucleus caudalis (Sp5C), which receives nociceptive information from the oro-facial regions, has four laminae. To clarify the role of glial cells in the transmission of the nociceptive information, the present study was conducted to examine the detailed distribution of astrocytes in each lamina and also to investigate a morphological interrelationship between the astrocytes and nerve endings in the rat Sp5C. After the preparation of the serial cryostat sections, immunohistochemistry for glial fibrillary acidic protein (GFAP) was employed to identify the astrocytes, and immunohistochemistry for substance P (SP), calcitonin gene-related peptide (CGRP), was used for the nerve endings. We also employed double-labeling immunofluorescence and electron microscopic immunohistochemistry for the GFAP/SP or GFAP/CGRP. GFAP-positive reactions were observed in all laminae of the Sp5C, and SP- or CGRP-positive nerve endings were observed in the lamina I and II. Additionally, we clarified the presence of GFAP/SP- or GFAP/CGRP-positive reactions by the double-labeling immunofluorescence and demonstrated the morphological interrelationship between the astrocytes and nerve endings by the double-labeling electron microscopic immunohistochemistry. These findings suggest that astrocytes might play some roles in the transmission of nociceptive information from the oro-facial region.View full abstractDownload PDF (287K)
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