From 1979 to 1989, 170 cases of firearm wounds in spinal column and spinal cord were treated. Of them 9 cases were recovered, 34 cases regained satisfactory function, 40 cases improved, 79 cases had no effects and 8 cases died. This article presented clinic materials and discussed the characteristic of such wounds. It was emphasized the early treatment and antishock should be taken, the decompression with laminectomy be done timely and any complication be actively prevented.

Objective To analyses the efficacy of treatment of blood vessels wounded with firearm in limbs by microsurgical technique Methods From March 1979 to October 2000,560 cases whose blood vessels were wounded with firearm in limbs were repaired by microsurgical technique Results Five hundred and twenty cases were good,17 cases were disable,15 cases were amputated limds,and 8 cases died Conclusions The majority of blood vessels wounded with firearm in limbs can be obtained good results being repaired by microsurgical technique

Objective To explore the effect of hyperphosphorylated tau protein on the formation of brain amyloid.Methods Okadaic acid was injected into lateral ventricle of rats, once a day for eight weeks. The place navigation and spatial probe ability of rats were assessed by Morris water maze. Immunohistochemistry techniques were used to detect the expressions of neurofibrillary tangles and amyloid.Results In the Okadaic acid group, the spatial learning and memory abilities of rats were significantly impaired. The mean incubation period of Morris water maze was longer than control group. The accumulation of neurofibrillary tangles and plenty of ?-amyloid positive cells were detected in hippocampus CA1, CA3 and CA4 regions, dentate gyrus and cortex. Deposition of ?-amyloid was observed in hippocampus CA1 and CA3 regions, dentate gyrus and cortex.Conclusion The hyperphosphorylated tau protein may significantly increase deposition of amyloid in brain.

Objective To observe the effects of repetitive transcranial magnetic stimulation (rTMS) on the expression of glial fibrillary acidic protein (GFAP) and OX-42 in hippocampus and dentate gyrus in rats.Methods The rats were treated with 1 Hz, 100 mT TMS 10 min once a day for 14 days, and then the expression of GFAP and OX-42 in hippocampus and dentate gyrus were investigated by ABC technique of immunohistochemistry.Results Compared with the control group, there were no significant difference in the expression of GFAP and OX-42 between the two groups.Conclusion rTMS using our parameters does not cause brain injury in rats.

Objective To evaluate the clinical manifestations and magnetic resonance imaging(MRI) features of the clinically isolated syndrome(CIS) of the spinal cord.Methods MRI features and expanded disability status scale(EDSS) score in 63 patients with multiple sclerosis(MS) showed early clinical manifestations of spinal CIS were retrospectively analysed.Results 52.9% of MS patients in the early performance was the spinal CIS,88.9% was acute or subacute onset,42.9% of the initial symptoms was isolated sensory dysfunction,and 54.9% had cervical spinal cord involvement.The first MRI positive rate was 91.1% and 35.3% presented with "multifocal" plagues.81.7% of the MRI lesions were not more than two vertebral segments,and 89.0% in the axial diameter of the spinal cord did not exceed 1/2.The number,volume and area of MRI lesions at baseline confirmed the positive correlation with EDSS at diagnosis of MS.Corticosteroid therapy before and after the EDSS score was of a significant difference(P= 0.003).Conclusion Spinal CIS often occurs in cervical spinal cord with acute or subacute onset,and incomplete spinal cord injury.MRI may detect "multifocal" plagues.Quantitative MRI is valuable for the assessment of prognosis.Early intravenous corticosteroid therapy can be an effective way to ease symptoms.

Objective To summarize the experience of microsurgical repair of soft tissue defects in 136 cases with firearm wound,to probe into repairing defect methods in different parts and to improve repairing results Methods According to the location,area of soft tissue defects or special needs,dorsalis pedis flap,latissimus dorsi flap,thoracoumbilical flap,forearm flap,lateral leg flap,tensor fascia lata flap or compound tissue flap were used to repair 136 cases with soft tissue defects in the firearm wound Results All 136 cases with soft tissue defects were repaired successfully Conclusions Microsurgical technique is a good method to repair soft tissue defects and reconstruct function in the firearm wound

Objective Peripheral nerve injuries are common in firearm injuries The outcomes of peripheral nerves injuries by firearm treated with microsurgical techniques were discussed Methods All 314 cases of firearm injuries of peripheral nerves were treated with five types of microsurgical techniques Results The outcome was good in a 2 year follow up The recovery rate for nerve function was 79 4% in upper extremity,and 62 6% in lower extremity Conclusions Microsurgical techniques are effective methods for treatment of firearm injuries of peripheral nerve

Objective To study the expressions of S100B and glial fibrillary acidic protein(GFAP) in the central nervous system of Sprague-Dawley rats during postnatal development. Methods Twenty-four male SD rats were divided equally into four groups according to different postnatal times:7-day group,14-day group,21-day group and adult group.Immunohistochemistry was used to investigate the expressions of S100B protein and GFAP in the brain and the spinal cord. Results The amount and density of S100B positive astrocytes decreased significantly in frontal cortex,hippocampus,striatum,substantia nigra and spinal cord during postnatal development.It seemed that the second through the third week after birth was a critical period for these changes.The amount and density of GFAP positive AST increased gradually in the brain,but it was the opposite in the spinal cord.Double-labeled immunofluorescence of S100B and GFAP in hippocampus CA1 area showed that S100B positive stains were evenly distributed in the pyramidal,polymorphic and molecular layers from the seventh till the twenty first day after birth,but apparently decreased in each layer especially in the molecular layer in adult hippocampus while the immunoreactivities of GFAP increased.The proportion of double labeled cells also increased with the aging and more of them were found in the pyramidal and polymorphic layers.Conclusion Different patterns of the expressions of S100B and GFAP exist during postnatal development.It may reflect the different roles of these proteins on the glial cell development.And it may also indicate that the expressions of S100B and GFAP are regulated by different mechanisms during the course of development,which reflects the differentiation of subpopulations of astrocytes during ontogenesis.

0.05).Conclusions The serum concentration of C_3 rises and the titer of AChRAb decreases in MG patients after treatment with glucocorticoid. There is no correlation between C_3 concentration and titer of AChRAb. The complement possibly cooperates with AChRAb in pathogenesis of MG.

Objective To observe the effects of low dose of veratrine on the discharges of rat hippocampus pyramidal neurons,and to elucidate its possible cytological mechanism.Methods The discharge features of hippocampus CA1 pyramidal neurons of 14-day-aged healthy Sprague-Dawley rats induced by low dose(0.3～0.8?mol/L)of veratrine were observed by slice patch-clamp technique.Presynap- tic stimulation was given to Schaffer collaterals.Presynaptic receptor inhibitors such as 6-cyano-7-nitroquinoxaline-2,3-dione(CNQX, 5?mol/L),DL-2-amino-5-phosphonopentanoic acid(AP-5,12.5?mol/L),bicuculline(Bic,10?mol/L)and tetrodotoxin(TTX,40～80nmol/L)were used to investigate the influence on veratrine-induced epilepsy andⅠ-Ⅴcurves were plotted under these conditions.Elec- trophysiological mechanism of veratrine-induced epilepsy was elucidated on the basis of these experiments,Results After a perfusion with low dose of veratrine,the pyramidal neurons were found to discharge relatively fixed-mode slow wave epileptoid bursts accompanied with hyperpolarization of membrane potential.These epileptoid bursts were not blocked by a mixture of CNQX,AP-5 and Bic,but by low dose of TTX.After a perfusion with veratrine,Ⅰ-Ⅴrelationship tended to be nonlinear and the depolarization rectification was enhanced,which were reversed by administration of low dose of TTX.The subthreshold TTX-sensitive persistent sodium current of CA1 pyramidal cells was enhanced by veratrine in a voltage-dependent manner.Conclusion Inducing slow wave epileptoid bursts,the low dose of veratrine can remarkably change the discharge features of CA1 pyramidal neurons.Such epileptoid activities were not influenced by the synaptic receptor inhibitors,and were obviously related to the persistent sodium current.