Ceramics ; Esthetics, Dental ; Humans

Atherosclerosis ; prevention & control ; Humans ; Vaccination

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

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

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.

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.

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 alternately performed.Recent advances in imaging technique and clinical application, such as Dyna-CT and Xper-CT, were also presented on the congress.

ObjectiveTo evaluate the safety and efficacy o f microvascular deco mpression in the management of primary trigeminal neuralgia.Methods We review ed 13 patients with unilateral primary trigeminal neuralgia treated by microvasc ular decompression. Conventional spin-echo (SE) sequence and 3-D fast inflow wit h steady-state precession (3-D-FISP) sequence MRI scans were used preoperatively to find evidence of neurovascular compression. The operation was accessed by re trosigmoidal approach and the nerve root was separated away from pressure vessel s by artificial vascular patch.ResultsDuring operations it w as found that tr igeminal nerves were pressed on by blood vessels in all the cases (by the superi or cerebellar artery in 11 cases; by the basilar artery and the superior cerebel lar artery in 1 case; and by the vein in 1 case). Complete pain relief was achie ved in all the patients without mortality or permanent complications. Eleven pat ients were clinically followed for 6～24 months with a mean of 13 months, and no recurrence was seen. ConclusionsMicrovascular decompression is a safe and effective procedure in the treatment of primary trigeminal neuralgia.

ObjectiveTo probe the short-term efficacy of endovascu lar stent-as sisted angioplasty for basilar artery stenosis.MethodsTwenty p atients with s ymptomatic basilar artery stenosis were treated by angioplasty using a balloon-e xpandable coronary stent.ResultsThe basilar artery caliber r eturned to norma l size in 12 cases and restored by more than 80% in the remaining 8 cases. No tr ansient ischemic attack (TIA), stroke, or other peri-operative complications rec urred. Follow-up angiography in 13 patients revealed no re-stenosis.Co nclusionsShort-term efficacy of endovascular stenting for basilar arte ry stenosis is promising.

ObjectiveTo assess the value of stent-assisted angiopl asty in the treatment of extracranial carotid stenosis.Methods A total o f 164 cases of ex tracranial carotid stenosis from October 2000 to December 2002, including 146 ca ses of carotid bifurcation stenosis, 13 cases of extracranial internal carotid s tenosis, and 5 cases of common carotid stenosis, were treated by self-expandable stent placement and angioplasty.ResultsStent placement and angioplasty was successfully accomplished in all the 164 patients. The degree of stenosis was re duced from (78 8?13 6)% before the treatment to (10 2?7 5)% after the oper atio n. There were 1 case of transient ischemic attack (TIA) (0 6%) and 1 case of mi n or stroke (0 6%) during the peri-operative period, but no death or major stroke took place. Follow-up for 3～30 months (mean, 8 9 months) in 145 cases found no T IA, cerebral apoplexy or death. Forty-five patients were followed by digital sub traction angiography (DSA) 6 months after the treatment, and asymptomatic re-ste nosis occurred in 1 case (2 2%).ConclusionsEndovascular ste nt-assisted angio plasty for extracranial stenosis is safe and effective, with favorable short-ter m outcomes.