During the teaching activities, to stimulate students' subject awareness and encour-age them to play the main role in class activities are inevitable trends in the reform of college educa-tion. Students’ subjective activity is a key to the teaching effect of regional anatomy, a course mainly based on experimental program. Department of Human Anatomy in Chongqing Medical University lay-outs regional anatomy teaching program to develop the students' subjective activities in learning from the course specialty: in preview and review, to train students' image-thinking by drawing; in anatomi-cal operation link, to cultivate students' interest in learning and innovation by discussing the relation-ship of anatomical structure and clinical disease and identifying the variation of structure; in the eval-uation process, taking the formative evaluation system to promote the students' initiatives and ensure the objectiveness and fairness. The implementation of these measures promotes the regional anatomy teaching quality.

Objective To investigate the role of demyelination and the alteration of chondrotin sulfate proteoglycan (CSPG,NG2) expression after compression injury of the spinal cord (CSCI).Methods Seventy-five adult Sprague-Dawley rats were randomly divided into a normal group,a sham-operation group,a CSCI 1 day group,a CSCI 3 day group,and a CSCI 7 day group.There were 15 rats in each group.The injuries in the CSCI groups were inflicted using a technique devised in our laboratory.Basso-Beattie-Bresnahan (BBB) neurological function assessment was used to assess the rats' motor function,osmic acid staining and transmission electronic microscopy (TEM)were used to observe any pathological changes of myelinated nerve fibers in the white matter at 1,3 and 7 days after CSCI.The amount of myelinated nerve fibers in the posterior funiculus of the spinal cord and the ratio of myelin sheath thickness to axon diameter (the G-ratio) were calculated.Any alteration in NG2 expression was observed by Western blotting.Results The average neurological function assessment scores in the CSCI groups were (1.23 ±0.45),(0.65 ± 0.35) and (0.00 ± 0.00) respectively.Compared with the normal group (21.00 ± 0.00) and the sham operation group (21.00 ± 0.00),the differences were all statistically significant.The rats' motor function deteriorated gradually with time after the CSCI.Osmic acid staining showed that the white matter was intact in the normal and sham groups.After being compressed the myelinated nerve fibers became swollen,degenerated and broke down.The amount of myelinated nerve fibers in the normal group,the sham operation group and the three CSCI groups was (2771 ± 108),(2675 ± 199),(2403 ± 161),(1708 ± 70) and (8 10 ± 95) respectively.The amount of myelinated nerve fibers decreased in the CSCI groups and reached a minimum on the 7th day.The difference was statistically significant.The TEM quantity analysis showed that the G-ratios in the normal,sham operation,and CSCI 1 day,3 day and7 day groups were (18.10±0.4),(17.70±1.0),(6.69 ±0.8),(5.73 ±0.4) and (4.95 ±0.5) respectively.Compared with the normal and sham operation groups,the G-ratios in the 3 CSCI groups were lower and reached their minimum on the 7th day after injury.The difference was statistically significant.TEM observation showed that the axons and myelin sheaths were intact in the normal and sham groups.After CSCI the axons became swollen and cell organelles in the axoplasm degenerated and decreased.The layers of myelin sheath shrank,folded and even wrinkled,which had an onion-like appearance.The oligodendrocytes exhibited chromatin condensation.Macrophages showed infiltration.Western blotting showed that the expression of NG2 in the CSCI groups reached a maximum on the 1st day after injury and then decreased with time.The expression of NG2 in the CSCI groups was higher than in the normal and sham groups,and the difference was statistically significant.Conclusion Demyelination occurs after CSCI-the amount of myelinated nerve fibers decreases and neurological deficits increase with time.The expression of NG2 was associated with changes in the myelin sheaths after CSCI and contributed to recovery of the myelin sheath through proliferation and differentiation to oligodendrocytes and perhaps other kinds of cells.

Objective To investigate the effect oftopiramate on NACHT-LRR-PYD-containing protein 3 (NALP3) inflammasome and intedeukin (IL)-1β levels in trigeminal ganglion of migraine rats.Methods Forty adult male Sprague Dawley rats were randomly divided into blank group,saline group,model group,prevention control group,10 mg/kg topiramate group,30 mg/kg topiramate group,60 mg/kg topiramate group,and 90 mg/kg topiramate group (n=5).Inflammatory soup was used to stimulate the dual matter of rats repeatedly to induce migraine models:rats in the blank group were without any treatment,those in the saline group were given saline to stimulate the dual matter,different concentrations of topiramate group were given to migraine models of the 10 mg/kg topiramate group,30 mg/kg topiramate group,60 mg/kg topiramate group,and 90 mg/kg topiramate group,respectively,and migraine models of the prevention control group were given saline containing 1％ Tween80.Three h after the last treatment,the expressions of NALP3,caspase-1 precursor (pro-caspase-1),caspase-1 and IL-1β in trigeminal ganglion of rats were detected by Western blotting,and the best concentration oftopiramate was chosen for subsequent immunofluorescence experiments.Ten healthy male adult SD rats were randomly divided into control group and topiramate group (n=5);the expression levels of NALP3,caspase-1 and IL-1β in trigeminal ganglion of the two groups were detected by immunofluorescence.Results The expression levels ofNALP3,pro-caspase-1,caspase-1 and IL-1β were not significantly different between saline group and blank group (P＞0.05);the expression levels ofNALP3,pro-caspase-1,caspase-1 and IL-1β in the model group were significantly higher than those in the saline group (P＜0.05).The expression levels of NALP3,pro-caspase-1,caspase-1 and IL-1β in 60 mg/kg topiramate group and 90 mg/kg topiramate group were significantly lower than those in the prevention control group (P＜0.05).The fluorescence intensity ofNALP3,caspase-1 and IL-1β in topiramate group was significantly lower than that in control group.Condusion Topiramate can inhibit the expression of NALP3 inflammasome and IL-1β in the trigeminal ganglion of migraine rat models,and it is likely to be one of the important mechanisms for the prevention of migraine.