Objective To explore the method for establish the temporal lobe epilepsy model in SD rats with stereotactic technique and to study the characteristic of electroencephalography (EEG) after epileptic seizure. Methods Kainic acid was injected into right hippocampus via stereotactic technique in 20 rats, and the behavior of rat was recorded by a video camera. The electrical activity changes of brain were recorded by EEG in bilateral hippocampus, amygdala and frontal lobe. Results According to Racine's scale, 6 rats were typeⅤ,10 rats were type Ⅳ,3 rats were type Ⅲ,1 rat was type Ⅱ. The spike wave was originated from hippocampus and spread to amygdala and frontal lobe. Pathologic changes showed that prolonged seizures induced pyramidal cell loss and death in hippocampus. Conclusions The method to establish kainic acid induced temporal lobe epilepsy model with stereotactic technique was credible, economical and useful. The spike wave originated from hippocampus was the basic feature of EEG of temporal lobe epilepsy model in rats.

Objective To study the changes of amplitude of low-frequency fluctuation (ALFF) of the resting state fMRI in heroin abuser (HD), and discussed its underlying neurophysiological mechanism.Methods The resting state fMRI data of 15 heroin abusers and 15 normal volunteers were analyzed by ALFF.The amplitude of the blood oxygenation level dependent activation of the resting state brain was investigated.The brain structures showing increased and decreased ALFF in TLE patients were demonstrated by comparing to normal subjects with 2-sample t -test with threshold of P＜0.05.Results Compared with normal subjects,the regions showing decreased ALFF in HD patients were distributed in right temporal lobe(45, - 30, -21 ) ,left hippocampus( - 36,- 33, - 6), right thalamus ( 24, - 12,27 ), left posterior cingulum gyrus ( - 15, - 54,24 ), right parietal lobe /precuneus ( 21, - 51,36 ), right inferior parietal lobule ( 21, - 48,78 ) and dorsal lateral aspect of the right frontal lobe(21, - 48,78) ,while ALLF of left(45, - 42,63 ) lateral frontal cortex(0 ,39,72) in HD patients was significantly higher.Conclusion HD shows abnormal brain functional organization in resting state, which may play an important role in the production, maintenance and relapse after withdrawal of heroin abuse.

PURPOSE: To observe changes in audiology, intellectual development, behavior development, and physical growth during systematic follow-up of infants with asymptomatic congenital human cytomegalovirus (HCMV) infection. MATERIALS AND METHODS: Fifty-two infants diagnosed with asymptomatic congenital HCMV infection from July 2003 to July 2007 served as the infection group, and 21 healthy infants served as the control group. All infants were confirmed to have HCMV infection by Fluorescent Quantative polymerase chain reaction (FQ-PCR). In both the infection and control groups, the neonates and infants at 3 months, 6 months, and 1 year of age underwent examinations. RESULTS: 1) 20 items of National Black Nurses Association (NBNA) scores of neonates 12-14 days after birth in 2 groups were 38.3 +/- 1.95 and 38.5 +/- 2.29, without significant differences. 2) Auditory test: 50 ears of 25 cases in the infection group showed abnormal auditory thresholds in V waves with an abnormal rate of 14%, while no abnormalities were found in 21 cases in the control group. 3) Mental and psychomotor development index scores in the control group (107.49 +/- 11.31 and 107.19 +/- 10.98) were compared with those in 41 asymptomatically infected infants at 1 year of age (107.21 +/- 9.96 and 108.31 +/- 11.25), and no statistically significant difference was noted. CONCLUSION: 1) An elevated threshold in the V wave was present in asymptomatically infected infants, but could not be detected through otoacoustic emission (OAE) screening. 2) Either in the neonatal or infant periods, asymptomatic congenital HCMV infection did not have a significant influence on nervous behavior or on physical and intellectual development.
Auditory Threshold ; *Child Development ; Cytomegalovirus Infections/*complications/congenital ; Female ; Humans ; Infant ; Infectious Disease Transmission, Vertical ; Male ; Neuropsychological Tests ; Psychomotor Performance

AIM:To investigate atrial natriuretic peptide(ANP) circadian in the encapsulated human ANP(hANP) cDNA transfected cells,to alter the ANP circadian by artificial control to achieve the objective of effectively treat hypertension or congestive heart failure(CHF). METHODS:ANP cDNA was transfected into Chinese hamster ovary(CHO) cells,which were encapsulated in polycarprolactone(PCL) tubes.The longterm survival of transfected CHO cells and the levels of ANP secreted were detected.Circadian rhythm of ANP secreted by encapsulated transfected cells was also studied,which was regulated by melatonin. RESULTS:During culturing,the ANP level secreted by transfected CHO cells in 2 mL of culture medium within 24 hours could reach 210.3 ng/L in a 20 mm-long and 2 mm-diameter PCL tube.The section of ANP displayed a circadian variation:higher in daytime,but lower at night.The acrophase of circadian rhythm was 4:15 but could be shifted to 7:55 after melatonin management. CONCLUSION:ANP cDNA transfected CHO cells that encapsulated into PCL tube can secret ANP,which might be suitable for the future implantation into human body.Our research provides a new approach in the treatment of hypertension and CHF by ANP.

Objective To explore surgical techniques and curative effects of microsurgical treatment for neurilemmoma in upper cervical spinal canal. Methods From Jan. 2004 to Nov. 2007, 59 cases of schwannoma was resected through microoperation, the operation was conducted through a posteromedial approach, using German Laika microscope resection of the tumor, large tumors cannot complete resection,block or sac, resection postoperative neck activity conventional neck restrictions, with following observation of 6 months-2 years. Results A complete recovery was achieved in 54 cases, an improvement of symptoms was achieved in 5 cases, no death was encountered. Follow-up observations were carried out in 55 cases from 3 months-2 years (6.5 ± 1.5 months). MRI examinations 3-12 months after operation in 35 cases found no residual or recurrent tumor. X-ray radiography under anteroposterior, lateral, and open-mouth view 6 months after operation in 42 cases showed no spinal deformation and good vertebral stability. Conclusions As long as neurilemmoma in upper cervical spinal canal are diagnosed, a microsurgical treatment should be given as early as possible. Appropriate selection of surgical approach, skillful microsurgical techniques in accordance with pathological types of lesions, and principles of minimal invasion are critical for the operation safety.

Objective To investigate the characteristic of P30o event-related potentials(ERP) of impulsive behavior in heroin addicts.Methods The Iowa gambling task (IGT) were performed by using the paradigm for psychological experiment both in heroin addiction group (HA group) and health control group (HC group),the inspection of electroencephalography were underwent in all the subjects concurrently.Following the collection of data of ERP,amplitude and latency of P300 were compared between the two groups,and then the relationship betweenamplitude or latency of P300 and the results of Barratt impulsiveness scale were analyzed separately.Results Compared to HC group,BIS score as well as the numbers of high frequency loss cards were significantly higher in HA group ( HA:75.12 ± 12.49,91.14 ± 21.35 ; HC:66.54 ± 8.61,73.71 ± 18.91 ; P ＜ 0.05 ),while the both two groups had visible waveforms of P30o,and the amplitude and latency were markedly lower ( HA:4.92 ± 1.14,293.43 ± 36.21 ; HC:7.65 ± 1.59,332.68 ± 40.15 ; P ＜ 0.05 ) and were negatively associated with BIS score in HA group( r =-0.76,-0.52,P＜ 0.05).Logistic regression results showed that the scores of BIS-11 were related to amplitude of P30o merely( P ＜ 0.05 ).Conclusion Impulsive behavior can be observed from the abnormal characteristic of the P300 event-related potential of impulsive behavior in heroin addicts,which may partly contribute to both addiction and relapse of heroin addict.

Objective To explore the abnormalities in the posterior cingulated cortex structure by voxel based morphometry(VBM)and changes of functional connectivity by resting-state functional magnetic resonance imaging(fMRI)in long-term heroin addictions.Methods High-resolution volumetric T1-weighted images and resting state fMRI examination were performed on 13 long-term heroin addicts and 14 matched healthy volunteers.The T1-weighted images were processed using optimized voxel-based morphometry to investigate abnormalities in the gray matter,at the sarne time,the posterior cingulated cortex was setted as the region-of-interest(ROI)seed,with which a whole-brain voxel temporal correlation in low frequency fMRI fluctuations was calculated,to find changes of the posterior cingulated cortex functional connectivity.Results Compared with the control group,gray matter concentration significantly decreased in the posterior cingnlated cortex,at the same time,the functional connectivity between the left posterior cingulated cortex and the right temporal lobe was increased,but the functional connectivity between the left posterior eingulated cortex and the left thalamus,the left parietal lobe,the left cerebrum were all decreased in heroin addicts.At the same time,the functional connectivity between the fight posterior cingulated cortex and the left thalamus,the left parietal lobe,the left frontal lobe were decreased in heroin addicts(t testing,P<0.01).Conclusion The structure and the functional connectivity in posterior cingulated cortex in long-term heroin addicts are changed,which may affect the dysfunction of the addictive brain and the function of reward mechanism.

Objective To analysis the therapeutic effect of microsurgery through single-nostril transsphenoidal approach on pituitary adenomas and to study the surgical skill and postoperative complications about microsurgery for pituitary adenomas.Methods The clinical manifestations,pathological type, removal percentage,postoperative complications and follow-up data of 241 cases with pituitary ademoma by microsurgery through single-nostril transsphenoidal approach were analysed retrospectively.Results 171(7 1%)cases were achieved total tumor removal,28(11.6%)cases were achieved subtotal tumor removal,26(10.7%)cases were achieved most tumor removal and 16(6.6%)cases were achieved partial tumor removal.Most of patients achieved better results,however there were 38(15.8%)eases with diabetes insipidus,12(4.9%)cases with transient worse sight,4(1.6%)cases with cerebrospinal fluid leakage,2(0.8%)cases with oculomotor paralysis,and no death.The postoperative complications were cured and outcome was considered as good.The follow-up period was 1-36 months in 241 patients and the clinical symptoms were improved by different degrees.Conclusion Pituitary adenomas can be treated by microsurgery through single-nostril transsphenoidal approach due to the time of operation shorten,the postoperative complications.

Objective To explore the functional imaging alteration of dorsal attention network (DAN) between heroin addicts and heroin abstainers and probe into its influence on attentional function.Methods Attention-related neuropsychological assessments were applied to evaluate the difference of attentional function between heroin addicts and heroin abstainers.With the functional magnetic resonance imaging (fMRI) data obtained from 17 heroin addicts and 15 heroin abstainers at resting state,we extracted the DANs of heroin withdrawal group and heroin dependence group respectively by using independent component analysis (ICA) and analysed the differences of intra-group and inter-group,then correlation analysis was performed among brain areas which have significant difference between groups and Stroop interference effect test.Results Compared with the heroin dependence group,there was a better result of attentional function in the heroin withdrawal group (P＜0.05),especially at the digit span test(backward) (P=0.0363),digit symbol test (writing) (P =0.0195),Stroop test C (reaction) (P =0.0379),Stroop test C (error) (P=0.0014) and Stroop interference effect test (P=0.0002).Neuroimaging findings demonstrated that there was a similar DAN in the heroin withdrawal group and heroin dependence group which mainly included the bilateral intraparietal suleus,postcentral gyrus and frontal eye field.Compared with the DAN of heroin addicts,significantly enhanced functional connectivity within the DAN of heroin abstainers was observed in the left superior parietal lobule (MIN:-24,-75,48),right inferior parietal lobule (MIN:39,-54,45) and left inferior parietal lobule (MIN:-33,-51,57).Significant negative correlations were observed between these brain areas and Stroop interference effect test in the heroin dependence group (r=-0.79,-0.69,-0.64,P＜0.01),but not in the heroin withdrawal group.Conclusions Heroin addiction can impair attentional function,compared with the DAN of heroin addicts,significantly enhanced functional connectivity in the left superior parietal lobule as well as bilateral inferior parietal lobule are observed in the heroin abstainers at resting state,which may be one of the neural mechanisms of attentional function improvement.

Objective To discuss the reoperation method for recurrent pituitary apoplexy after the successful initial transnasal-sphenoidal surgery.Methods Twenty-one patients with pituitary apoplexy were found recurrence after previous tumor resection via transsphenoidal surgery in 9 months to 5 years.In the reoperation,transsphenoidal approach would be still used.The anterior wall of sphenoid sinus and the sellar floor were located accurately,and then the remnants of them were removed as large as possible to expand the range of bone window.Next,the intrasellar hematoma was cleared away gently,and the residual tumor was removed progressively and thoroughly to make sure the sellar diaphragm subsiding fully and finally removed the whole tumor.Results Most of recurrent tumors were found to be of soft texture with rich blood supply,and 17 cases were still apoplexy.In 18 cases of the 21 patients,total resection was achieved.However,for the other 3 cases with tumor aggressive growth,only massive resection was achieved,and underwent stereotactic radiosurgery postoperatively.Postoperative clinical symptoms were alleviated in 15 cases,whose hormones were also decreased.Temporary diabetes insipidus and hypopituitarism appeared in 5 and 3 cases respectively,but all of these postoperative complications were relieved after symptomatic treatment.Two cases of intraoperative cerebrospinal fluid leakage were resolved by packing the cavity with muscle and fat flaps.All cases were followed up for 3 months- 5 years,residual tumor enlarged in only 1 case of massive resection,which umderwent transsphenoidal surgery for the third time,no other cases recurred.Conclusion Operation via the transsphenoidal approach of recurrent pituitary apoplexy after successful initial transsphenoidal surgery could achieve high total resection rate.While the accurate locating,full expansion of the saddle bone window,and repeatedly scraping the apoplexy tumor to get a full subsidence for the sellar diaphragm,are the key points to remove tumors totally as well as to improve the symptoms.