神经板

ABSTRACT:OBJECTIVETo study the correlation between anatomic structure of the inferior alveolar nerve canal and dental implantation by measuring mandible innervation esemplarsMETHODSThe intramandibular course of mandibular canal and its dimendion were measured in 15 mandibles with teeth; the relationship between blood vessel and nerve was observed in 5 fresh samples in which the artery was filled; and then the data were analyzed by statisticsRESULTSThe mandibular canal was close to the lingual side and the inferior margin of the mandible, the mandibular canal and the 10mm underside of mandible were parallel in the region of the first and the second molars, it runned outboard to genal aperture when it was hereabout genal aperture, and the blood vessel lay above nerve in the mandibular canalCONCLUSIONIn implant operation performed according to normal anatomy, injury to inferior alveolar nerve may be avoided.

［目的］探讨下颌管的解剖结构与牙种植的关系［方法］选取15具牙列完整的成人离体下颌骨标本和5具经过动脉血管内灌注的新鲜标本，测量下颌骨在每个牙位截面上有关牙槽嵴及下颌管的相关数据，进行统计学分析［结果］牙槽嵴顶以及下方10mm宽度由前向后逐渐增宽；牙槽嵴由上向下逐渐增宽；下颌管位于下颌骨体内下方走行中偏舌侧，并近下颌骨下缘，在下颌第1，2磨牙区下颌管走行与下颌下缘成平行状，在近颏孔处转向外和向颊侧出颏孔；下颌管内血管位于下牙槽神经之上［结论］牙种植术中按正常解剖部位并且侧重颊侧骨板操作，可避免损伤下牙槽神经；如果术中下颌管内突然涌出大量新鲜血液，则提示若继续手术可能损伤下牙槽神经。

ABSTRACT:OBJECTIVETo study the correlation between anatomic structure of the inferior alveolar nerve canal and dental implantation by measuring mandible innervation esemplarsMETHODS The intramandibular course of mandibular canal and its dimendion were measured in 15 mandibles with teeth; the relationship between blood vessel and nerve was observed in 5 fresh samples in which the artery was filled; and then the data were analyzed by statisticsRESULTSThe mandibular canal was close to the lingual side and the inferior margin of the mandible, the mandibular canal and the 10mm underside of mandible were parallel in the region of the first and the second molars, it runned outboard to genal aperture when it was hereabout genal aperture, and the blood vessel lay above nerve in the mandibular canalCONCLUSIONIn implant operation performed according to normal anatomy, injury to inferior alveolar nerve may be avoided.

［目的］探讨下颌管的解剖结构与牙种植的关系［方法］选取15具牙列完整的成人离体下颌骨标本和5具经过动脉血管内灌注的新鲜标本，测量下颌骨在每个牙位截面上有关牙槽嵴及下颌管的相关数据，进行统计学分析［结果］牙槽嵴顶以及下方10mm宽度由前向后逐渐增宽；牙槽嵴由上向下逐渐增宽；下颌管位于下颌骨体内下方走行中偏舌侧，并近下颌骨下缘，在下颌第1，2磨牙区下颌管走行与下颌下缘成平行状，在近颏孔处转向外和向颊侧出颏孔；下颌管内血管位于下牙槽神经之上［结论］牙种植术中按正常解剖部位并且侧重颊侧骨板操作，可避免损伤下牙槽神经；如果术中下颌管内突然涌出大量新鲜血液，则提示若继续手术可能损伤下牙槽神经。

A network with different topologic configurations is needed for flatness pattern recognition when strip width is changing, in this case the large learn assignment, slow convergence and local minimal in the network are observed, in order to solve these problems, first, a flatness pattern recognition GA BP network model with only 6 input and 3 output signals has been established based on Legendre orthodoxy polynomial, which is not only simple in structure but also is of clear physical meaning.

针对板宽变化时需要不同拓扑结构的神经网络才能完成板形模式识别任务，网络学习工作量大，网络存在收敛速度慢，易陷入局部极小等结构性能不佳的问题，首次建立了以勒让德正交多项式为基模式的只用 6个输入信号、3个输出信号的板形模式识别 GA- BP网络模型。

The groove that develops down the center of the neural plate .

在神经板中心下的沟槽。

PubMed abstract: Cells at the anterior boundary of the neural plate can induce telencephalic gene expression when transplanted to more posterior regions.

PubMed摘要：神经板前部的细胞可以在转移到靠后部区域时，引起前脑胞基因表达。

RESULTS: Chitin tubes containing NGF successfully induced the nerve regeneration, regularly arranged myelinated and unmyelinated axons could be observed across the 8 mm gaps, and the myelin sheath was thick with clear lamellar structure at 8 weeks after operation, The regenerated nerve fibers increased and were more mature at 16 weeks after operation.

结果 实验侧术后8周，再生神经中有髓和无髓神经纤维排列整齐，有髓神经的髓鞘厚，板层结构清晰；术后16周，再生神经中有髓和无髓神经纤维数量增加，形态接近正常神经。

METHODS: NSCs were isolated from neonatal rats by enzyme digestion and mechanical separation. At the fourth passage, cell clone masses received nestin immunocytochemistry. Remaining cells were dispersed by mechanical separation. Monoclone NSCs were incubated by limiting dilution assay, and made into 108 L-1 monoplast suspension in complete medium. NSCs were assigned into 2 groups. NSCs in the control group were incubated in 10% fetal bovine serum.

酶消化和机械分离法相结合体外分离培养新生鼠神经干细胞，传至第4代的细胞克隆团行巢蛋白免疫细胞化学染色观察，剩余细胞团用机械法分散，采用有限稀释法进行单克隆神经干细胞培养，加入完全培养基制成108 L-1的单细胞悬液，分为2组滴入培养板，对照组加入10%FBS，诱导组加入10%FBS+50 μg/L神经生长因子，培养5~7 d。

The process of establishing neural network is as follows: two-layer neuronic network configuration is selected, S-type active function is used, input parameter of network are selected for thickness, preheat temperature, heat input and sampling point, output parameter of network is selected for fracture toughness property CTOD, learning algorithm of network is used for back-propagation algorithm.

本文选择了2层神经元的神经网络结构，采用S型激活函数，将板厚、预热温度、线能量、取样位置作为神经网络的输入，将环焊接头的裂纹尖端张开位移CTOD值作为网络的输出，通过BP算法的网络学习，采用VC语言建立了X70管线钢环焊接头CTOD与环焊工艺之间的神经网络。

Method］twenty six wistar rats were divided into two groups, with 13 in each group, peroneal nerve was transacted on the right side of all the animals, in one group, the proximal end of peroneal nerve was turned back and ligated, the distal end was sutured to the side of tibial nerve with perineurial window, in another group,both ends of the transacted peroneal nerve were turned back and ligated as contrast, no operation was done on the left side.

方法］wistar大白鼠26只，随机分实验组和对照组，每组13只，实验组右侧腓总神经切断后，近端反转结扎，远端与胫神经外膜开窗处行端侧吻合，对照组右侧腓总神经切断后，两端均反转结扎，两组动物左侧作正常对照，不作处理。术后3个月，行双侧腓总神经、胫前肌组织学检查，胫前肌湿重测定，运动终板检查。

objective to investigate the effect of radiography and method of operation on the surgical indication as well as the operation treatment of lumbar disc herniation and lumbar canal stenosis.methods the data of 300 cases with lumbar disc herniation and lumbar canal stenosis were reviewed from jan 1999 to dec 2004.all cases were treated by the method of minimal invasive open operation.the nucleus was resected through an 3.5～4.5cm in length.the sacrospinalis muscle between laminae was stripped partly and the part of upper lamina and the part of medial facet was resected.

目的 探讨影像学检查和手术方法对腰椎间盘突出症和椎管狭窄症手术方式和适应证的影响。方法自1999年1月～2004年12月，为300例腰椎间盘突出症和椎管狭窄症患者实施微创开放式手术，做3.5～4.5cm长的皮肤切口，剥离椎间的部分骶棘肌，咬除部分椎板上缘及小关节内侧缘后，摘除髓核，并根据需要做半椎板或全椎板手术或扩大神经根管和切除肥厚的黄韧带及神经管内的骨性增生。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐