Ceramics ; Esthetics, Dental ; Humans

Atherosclerosis ; prevention & control ; Humans ; Vaccination

Finite element analysis can be used to study the change of the structure and the interior field intensity of human and animal body organs and tissues with simulation experiment. We in our research used finite element analysis software to analyze and solve the spinal cord surface potential problems, and investigated the transmission features of signals generated by interneurons in spinal nerves which were related with body motion control and sensory processing. A three dimensional model of electrical source in rat spinal cord was built, and the influence on potential distribution on spinal cord surface caused by position changes of electrical source in transverse direction and dorsoventral direction were analyzed and calculated. We obtained the potential distribution curves of spinal cord surface and found that the potential distribution on spinal cord surface showed monotone. In addition, potentials of some registration points were smaller than that of registration points around.
Action Potentials ; Animals ; Computer Simulation ; Finite Element Analysis ; Humans ; Interneurons ; physiology ; Models, Anatomic ; Rats ; Spinal Cord ; physiology

Acupuncture Analgesia ; Animals ; Central Nervous System ; metabolism ; Electroacupuncture ; Nitric Oxide ; metabolism ; Pain Threshold ; physiology ; Rats ; Rats, Wistar

Cerebral vasospasm is the main reasons of cerebral infarction and delayed ischemic neurological deficit in patients with spontaneous subarachnoid hemorrhage. At present, the research of cerebral vasospasm is relatively focused on the spasmogens in bloody cerebro-spinal fluid. This article reviews the mechanisms of cerebral vasospasm induced by the major spasmogens in the bloody cerebrospinal fluid after subarachnoid hemorrhage.

Objective To analyze the causes, prevention and treatment of repture druing procedure for intracranial aneurysm embolization with GDC.Methods All the seven patients were embolized. Six patients were ruptured during the procedure and continuously embolized until the bleeding was halted. Another one was identified by post procedure CT. Results Four patients recovered unevent fully with one only suffering from mild deficit. Another 2 patients died of hyper intracranial pressure within one week. Conclusions Rupture during procedure of intracranial aneurysm embolization with GDC may be related to manipulation, properties of the parent artery and arneurysm. Continuous embolization with GDC will provide favorable prognosis for the patients.

There are many practical problems to be solved in 7-year program teaching.The whole teaching thought should be widened further.With practical experiences of diagnostics teaching for 7-year program students for many years,we have summed up the results of 7-year program teaching reform.Appling to the holistic teaching mode reform of diagnostics of 7-year program,we have attained the first step achievements.

The annual Live Interventional Neuroradiology & Neurosurgery Course (LINNC) is one of the most important congresses in the neurosurgery and neuroradiology field. LINNC 2009 was held on May 25th this year and lasted for 3 days. In this article, the authors introduced the main points of the congress The congress mainly discussed some hot topics at present time, including both the clinical and fundamental studies of cerebral arteriovenous malformation. Ischemic cerebral disease and intracranial aneurysm, etc. Both neurological and neuroradiological case demonstrations related to the topics, and the main course of the congress were altemately performed. Recent advances in imaging technique and clinical application, such as Dyna-CT and Xper-CT, were also presented on the congress.

Objective To evaluate the endovascular embolization treatment of large and giant ophthalmic aneurysms. Methods Three aneurysms were embolized with coils only and 5 aneurysms were treated with stent placement togather with subsequent coiling. Results In the 3 aneurysms treated only with GDC, total embolization was achieved in 1 and partial embolization in 2. In the stent placement and coiling case, 4 aneurysms were densely packed and another one was partially packed. Conclusions Combined stenting and coiling is effective and safe for the treatment of large and giant ophthalmic artery aneurysm with the preservation of parent artery.

Objective To evaluate our short term results in endovascular treatment of symptomatic vertebral arteral stenosis with stents. Methods Balloon expanded stents were utilized to pass across the vertebral arterial stenosis, and then the balloons were inflated for the deployment of stents, outcoming with restoration of the stenosis to normal size. Results Forty five patients presented with posterior circulation ischemic symptoms and refractory to medical therapy were undertaken with endovascular stenting, showing technically successful in forty three of them. The mean degrees of preoperative and postoperative stenosis were 75.7% and 10.3%, respectively. Follow up data showed disappearence of clinical symptoms in 35 patients, chinical implovement and stabilization in 2. There were no intimal dissection and distal embolization. Short term follow up angiogram revealed no restenosis and intimal hyperplasia. Conclusions Endovascular stenting may be a favorable alternative for the treatment of vertebral arterial stenosis, but long term follow up is necessary.