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Volume 82 (2005)
- Issue 4 Pages 111-
- Issue 3 Pages 79-
- Issue 2 Pages 31-
- Issue 1 Pages 1-
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Volume 82, Issue 4
Displaying 1-6 of 6 articles from this issue
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Naoki SHIRAISHI, George MATSUMURA2006 Volume 82 Issue 4 Pages 111-116
Published: 2006
Released on J-STAGE: January 12, 2008
JOURNAL FREE ACCESSWe investigated 60 cadavers to examine the accurate location of conus medullaris, lower end of dura mater,and intercrestal line (Jacoby's line).
Jacoby's line was established using the method described by Jacoby GW (1899). Then the intersection of this lineand vertical line through the spinous processes was marked by a fine nail. After a laminectomy was performed to exposethe spinal cord, spinal level of the conus medullaris, the lower end of dura mater, and Jacoby's line were examined, andmarked and recorded these locations of nailing.
In 2 of 48 cases (2.1%), Jacoby's line passed through the level superior to 3rdlumber vertebra (L3). The Conusmedullaris was at the level beneath L3 in 2 of 57 cases (3.5%). And lower end of dura mater was located beneath thesuperior margin of S3 in 1 of 28 cases (3.6%). When Jacoby's line is used as a guide-point, the site for subarachnoidpuncture is established in the L3-4 interspinous space. But when we consider the risk of spinal cord injury cannot becompletely excluded, in case that conus medullaris is located inferior to L3 in 3.5% of cases. Conseqently, it should beimportant to avoid performing subarachnoid puncture at L2-3 or higher lumbar vertebral level especially in the elderly.View full abstractDownload PDF (108K) -
Tetsu-o TAI, Yutaka IRIE, Koichi OGAWA2006 Volume 82 Issue 4 Pages 117-126
Published: 2006
Released on J-STAGE: January 12, 2008
JOURNAL FREE ACCESSThis study was performed to investigate causes of various types of topographical relationship between the lateral circumflex femoral artery (L) and the saphenous nerve (S).
Femoral artery (F), deep femoral artery (P), L and S of 186 legs of 93 Japanese adult cadavers were submitted to anatomy. Further, the levels of origin of L in thigh were measured.
L were classified into nine types by the origins of L and topographical relationship between L and S.
The incidence of various types of L is different among researchers. Our findings proved that these differences were caused by the differences in evaluations of twig from ascending branch (AB) or descending branch (DB) of L.
In cases of L originating from F, incidence of L positioned in front of S is significantly higher than L originating from P (p<0.01). In cases of L originating from F, L positioned in front of S originates from F at the significantly more proximal level compared to L positioned posterior to S (p<0.001). Furthermore, also in cases of L originating from P, L positioned in front of S originates from P at the significantly more proximal level compared to L positioned posterior to S (p<0.001). It is supposed that the topographical relationship between L and S changes depending on the artery where L originates and the level of origin of L.View full abstractDownload PDF (530K) -
Junji SHINDO, Ken YOSHIMURA, Kan KOBAYASHI2006 Volume 82 Issue 4 Pages 127-138
Published: 2006
Released on J-STAGE: January 12, 2008
JOURNAL FREE ACCESSThe lingual papillae and the connective tissue cores (CTC) of the American beaver were examined by light and scanning electron microscopy. The tongue of American beaver was about 9 cm in length, 3.5 cm in width, and has a lingual prominence. Four types of papillae (filiform, fungiform, vallate and foliate papillae) were observed. The filiform papillae can be classified into three types (filiform, large filiform and dorm-like papillae). Filiform papillae distributed on the anterior tongue and posterior of the lingual prominence consisted of a posterior thick main process and several small accessory processes. After removal of the epithelium, the CTCs of the filiform papillae had U-shaped, horseshoelike primary cores with 10-15 rod-shaped small accessory cores. Large filiform papillae were distributed at the anterior margin of the lingual prominence. Dome-like papillae were distributed at the top of lingual prominence. Fungiform papillae were observed two types. Fungiform papillae, which were distributed at the anterior tongue, were round shaped. Fungiform papillae of the posterior of the lingual prominence were large and surrounded with a papillary groove. At the posterior of the tongue, three vallate papillae were arranged in a triangular pattern. Foliate papillae were on 22 to 25 parallel ridges and grooves.View full abstractDownload PDF (548K) -
- A Radiographic Evaluation -Naoki SHIRAISHI, George MATSUMURA2006 Volume 82 Issue 4 Pages 139-146
Published: 2006
Released on J-STAGE: January 12, 2008
JOURNAL FREE ACCESSIn this study, we examined the position of intercrestal line that is called Jacoby's line at heights of the vertebral body and spinous process in different positions of the lumbar spine using radiographs of 100 subjects.
At the height of the spinous process, Jacoby's line was most often observed in the extension position in L4 spinous process middle 1/3 region in males and in L4-5 interspinous region in females. In the neutral position, it was in L4 spinous process middle 1/3 region in males and in L4-5 interspinous region in females. And that in the flexion position, it was in L4-5 interspinous region in both males and females.
At the height of the vertebral body, Jacoby's line was most often observed in the extension position in L4-5 intervertebral region in males and in L5 vertebral body upper 1/3 region in females. In the neutral position, it was in L4 vertebral body lower 1/3 region in males and in L5 vertebral body upper 1/3 region in females. In the flexion position, it was in L5 vertebral body upper 1/3 region in males and in L5 vertebral body upper 1/3 region or L4 vertebral body lower 1/3 region in females.
There was no gender difference in the most often observed position of Jacoby's line at the height of the spinous process in the flexion position.
The position of Jacoby's line was found to vary in different positions of the lumbar spine. Positioning Jacoby's line in the neutral lumbar spine from the body surface, as conventionally proposed, was not always accurate, and it was considered practical to establish Jacoby's line using the spinous process in the flexion of the lumbar spine as the standard. When Jacoby's line is established by this method, it is considered to be positioned between L4-5 spinous processes middle 1/3 regions. In subarachnoid puncture in elderly patients, the puncture may be performed at a higher position in relation to the spinal cord because of spinal degeneration. Therefore, it is important to perform subarachnoid puncture in elderly patients at a site lower than the established Jacoby's line.View full abstractDownload PDF (241K) -
Shunji KUMABE, Michiko NAKATSUKA, Gi-Seup KIM, Seong-Suk JUE, Fumiko A ...2006 Volume 82 Issue 4 Pages 147-156
Published: 2006
Released on J-STAGE: January 12, 2008
JOURNAL FREE ACCESSMany studies on tissue stem cells have been conducted in the field of regenerative medicine, and some studies have indicated that cultured dental pulp mesenchymal cells secrete dentin matrix. In the present study we used alginate as a scaffold to transplant subcultured human dental pulp cells subcutaneously into the backs of nude mice. We found that when β-glycerophosphate was added to the culture medium, dentin sialophosphoprotein mRNA coding dentin sialoprotein (DSP) was expressed. An increase in alkaline phosphatase, which is an early marker for odontoblast differentiation, was also demonstrated. At 6 weeks after implantation the subcutaneous formation of radio-opaque calcified bodies was observed in situ. Immunohistochemical and fine structure studies identified expression of type I collagen, type III collagen, and DSP in the mineralizing transplants. Isolated odontoblast-like cells initiated dentin-like hard tissue formation and scattered autolyzing apoptotic cells were also observed in the transplants. The study showed that subcultured dental pulp cells actively differentiate into odontoblast-like cells and induce calcification in an alginate scaffold.View full abstractDownload PDF (755K) -
- The Position of External and Internal Carotid Arteries May be Reversed -Hideshi ITO, Izumi MATAGA, Ikuo KAGEYAMA, Kan KOBAYASHI2006 Volume 82 Issue 4 Pages 157-168
Published: 2006
Released on J-STAGE: January 12, 2008
JOURNAL FREE ACCESSKnowledge of clinical anatomy in the neck region is useful for the diagnosis of primary tumors and metastatic lymph nodes. Arteries and nerves in the neck region of forty Japanese cadavers (80 cases), 18 males (36 cases) and 22 females (44 sides) were studied by dissection. We obtained the following results. Reverse of the location of the external and internal carotid arteries was found in 5 cases (6.3%). The course of the hypoglossal nerve made an acute curve and ran anterior-inferior in the neck region. In regard to the height of bifurcation of the common carotid artery (CC), high bifurcation was seen in 25 (31.2%), standard bifurcation in 46 (57.5%), and low bifurcation in 9 (11.3%) in a total of 80 cases. Furthermore, the facial artery had the largest inner diameter among the branches of the external carotid artery. Based on these findings, the facial artery will be one of the most beneficial arteries for transplantation as a recipient artery.View full abstractDownload PDF (468K)
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